Dr David Williams

Committees

Member, General Committee for Nomenclature, 2016 - on going.

Memberships

Council member, Book Series: Species and Systematics, University of California Press, 2011 - on going.

Fellow, The Linnean Society, 1992 - on going.

Member, Systematics Association, 1990 - on going.

Fellow, International Willi Hennig Society, 1985 - on going.

Member, International Society for Diatom Research, 1985 - on going.

Publications

Williams DM, Ebach MC (2018) Aphyly: identifying the flotsam and jetsam of systematics. Cladistics, 34 (4) : 459 - 466. doi: 10.1111/cla.12207

Liu B, Williams DM, Ector L (2018) Entomoneis triundulatasp. nov. (Bacillariophyta), a New Freshwater Diatom Species from Dongting Lake, China. Cryptogamie, Algologie, 39 (2) : 239 - 253. doi: 10.7872/crya/v39.iss2.2018.239

LIU B, WILLIAMS DM, LIU Q (null) A new species of Cymbella (Cymbellaceae, Bacillariophyceae) from China, possessing valves with both uniseriate and biseriate striae. Phytotaxa, 344 (1) : 39 - 39. doi: 10.11646/phytotaxa.344.1.5

Cesar EA, Wilbraham J, Williams D (2018) Diatom Collections at the Natural History Museum: Using digitisation to maximise research potential. Presented at British Phycological Society Conference - Southend, Essex 2018.

Williams DM, Ebach MC (2018) A Cladist is a systematist who seeks a natural classification: some comments on Quinn (2017). Biology & Philosophy, 33 (1-2) : doi: 10.1007/s10539-018-9621-7

JÜTTNER I, WILLIAMS DM, GURUNG S, VAN DE VIJVER B, LEVKOV Z, SHARMA CM, SHARMA S, COX EJ (null) The genus Odontidium (Bacillariophyta) in the Himalaya—a preliminary account of some taxa and their distribution. Phytotaxa, 332 (1) : 1 - 1. doi: 10.11646/phytotaxa.332.1.1

Williams DM, Sims PA, Ashworth M, Theriot EC (2017) (2561–2562) Proposals to reject the names Microtheca and Anuraea octoceras (M. octoceras) (Bacillariophyceae). TAXON, 66 (6) : 1466 - 1467. doi: 10.12705/666.13

Kociolek JP, Balasubramanian K, Blanco S, Coste M, Ector L, Liu Y, Kulikovskiy M, Ludwig T, Lundhom N, Potapova M, Rimet F, Sabbe K, Sala S, Sar E, Taylor J, Van de Vijver B, Wetzel CE, Williams DM, Witkowski A, Witkowski J, Vandepitte L, Decock W, Vanhoorne B (2017) BEYOND NAMES: DEVELOPING A NAMES DATABASE AND OTHER APPLICATIONS FOR DIATOMS. PHYCOLOGIA 56 (4) : 102 - 103.

LIU B, WILLIAMS DM, TAN LIN (null) Three new species of Ulnaria (Bacillariophyta) from the Wuling Mountains Area, China. Phytotaxa, 306 (4) : 241 - 241. doi: 10.11646/phytotaxa.306.4.1

LIU B, WILLIAMS DM, OU Y (null) Adlafia sinensis sp. nov. (Bacillariophyceae) from the Wuling Mountains Area, China, with reference to the structure of its girdle bands. Phytotaxa, 298 (1) : 43 - 43. doi: 10.11646/phytotaxa.298.1.4

Kitching IJ, Forey PL, Williams DM (2017) Cladistics ☆. Elsevier

Williams DM, Ebach MC (null) What is Intuitive Taxonomic Practise?. Systematic Biology, syw094 - syw094. doi: 10.1093/sysbio/syw094

Williams DM, Gololobova M, Glebova E (2016) Boris Vasil’evich Skvortzov (1896–1980): notes on his life, family and scientific studies. Diatom Research, 31 (3) : 313 - 321. doi: 10.1080/0269249x.2016.1211556

Williams D, Schmitt M, Wheeler Q (2016) The Future of Phylogenetic Systematics The Legacy of Willi Hennig. Williams DM, Schmitt M, Wheeler Q (Eds). Cambridge University Press : Cambridge. 508.

Ung V, Zaragueta-Bagils R, Williams DM (2016) Comparative biogeography of Southeast Asia and the West Pacific region. Biological Journal of the Linnean Society, 117 (2) : 372 - 385. doi: 10.1111/bij.12670

Williams DM, Buczko K (2016) Fragilariforma Hajosiae: re-description and revision of Pantocsek's species Diatoma fossile (Bacillariophyta). PHYTOTAXA, 244 (2) : 181 - 190. doi: 10.11646/phytotaxa.244.2.6

Williams DM, Buczko K (null) Fragilariforma Hajósiae: re-description and revision of Pantocsek’s species Diatoma fossile (Bacillariophyta). Phytotaxa, 244 (2) : 181 - 181. doi: 10.11646/phytotaxa.244.2.6

Williams DM (2016) Examination of type specimens forColliculoamphora reichardtiana(Grunow) Williams and Reid, with a description of a new species,Colliculoamphora johnwrightiinov. sp.. Diatom Research, 31 (1) : 77 - 83. doi: 10.1080/0269249x.2016.1139627

Williams DM (2016) Petroplacus gen. nov. (Bacillariophyta): a new genus of diatom from Lake Baikal. Phytotaxa, 272 (4) : 267 - 276.

Juettner I, Williams DM, Levkov Z, Falasco E, Battegazore M, Cantonati M, de Vijver BV, Angele C, Ector L (2015) Reinvestigation of the type material for Odontidium hyemale (Roth) Kutzing and related species, with description of four new species in the genus Odontidium (Fragilariaceae, Bacillariophyta). PHYTOTAXA, 234 (1) : 1 - 36.

Jüttner I, Williams DM, Levkov Z, Falasco E, Battegazzore M, Cantonati M, Van de Vijver B, Angele C, Ector L (null) Reinvestigation of the type material for Odontidium hyemale (Roth) Kützing and related species, with description of four new species in the genus Odontidium (Fragilariaceae, Bacillariophyta). Phytotaxa, 234 (1) : 1 - 1. doi: 10.11646/phytotaxa.234.1.1

Witkowski J, Sims PA, Strelnikova NI, Williams DM (2015) Entogoniopsis gen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser. PHYTOTAXA, 209 (1) : 1 - 89.

WITKOWSKI JAKUB, SIMS PATRICIA, STRELNIKOVA NINA, WILLIAMS DAVID (2015) Entogoniopsisgen. nov. and Trilamina gen. nov. (Bacillariophyta): a survey of multipolar pseudocellate diatoms with internal costae, including comments on the genus Sheshukovia Gleser. Phytotaxa, 209 (1) : 1 - 1. doi: 10.11646/phytotaxa.209.1.1

Kociolek JP, Theriot, EC, Williams, DM, Julius, M, Stoermer, EF, Kingston JC (2015) Centric and Araphid Diatoms, In: Freshwater Algae of North America, Elsevier : 653 - 708.

Liu B, Williams DM, Huang B (2015) Gyrosigma rostratum sp. nov. (Bacillariophyta) from the low intertidal zone, Xiamen Bay, southern China. PHYTOTAXA, 203 (3) : 254 - 262. doi: 10.11646/phytotaxa.203.3.4

LIU BING, WILLIAMS DAVIDM, HUANG BANGQIN (2015) Gyrosigma rostratum sp. nov. (Bacillariophyta) from the low intertidal zone, Xiamen Bay, southern China.. Phytotaxa, 203 (3) : 254 - 254. doi: 10.11646/phytotaxa.203.3.4

Blanco Lanza S, WILLIAMS DAVIDM (2015) Corrections to the nomenclature of genus Diatoma (Bacillariophyta: Fragilariaceae). Phytotaxa, 202 (3) : 225 - 225. doi: 10.11646/phytotaxa.202.3.7

Kociolek JP, Williams DM (2015) How to define a diatom genus? Notes on the creation and recognition of taxa, and a call for revisionary studies of diatoms. Acta Botanica Croatica, 74 (2) : 195 - 210. doi: 10.1515/botcro-2015-0018

Williams DM, Hasle G (2015) Pat Sims: A bibliography with annotations concerning type material. NOVA HEDWIGIA, 1 - 33. doi: 10.1127/nova_suppl/2015/0028

PENG YUMEI (2014) Morphology and ultrastructure of Hippodonta qinghainensis sp. nov (Bacillariophyceae), a new diatom from Lake Qinghai, China. Phytotaxa, 186 (2) : 61 - 61. doi: 10.11646/phytotaxa.186.2.1

Williams DM (2014) The diatom genus Tetracyclus (Fragilariaceae, Bacillariophyta) from Chile. Phytotaxa, 178 (2) : 151 - 151. doi: 10.11646/phytotaxa.178.2.7

EBACH MALTEC, WILLIAMS DAVIDM (2014) Reading Trees. Zootaxa, 3814 (2) : 297 - 297. doi: 10.11646/zootaxa.3814.2.10

de Carvalho MR, Ebach MC, Williams DM, Nihei SS, Trefaut Rodrigues M, Grant T, Silveira LF, Zaher H, Gill AC, Schelly RC, Sparks JS, Bockmann FA, Séret B, Ho H-C, Grande L, Rieppel O, Dubois A, Ohler A, Faivovich J, Assis LCS, Wheeler QD, Goldstein PZ, de Almeida EAB, Valdecasas AG, Nelson G (2014) Does counting species count as taxonomy? On misrepresenting systematics, yet again. Cladistics, 30 (3) : 322 - 329. doi: 10.1111/cla.12045

Zhang H-X, Zhang M-L, Williams DM (2014) Genetic evidence and species distribution modelling reveal the response of Larix sibirica and its related species to Quaternary climatic and ancient historical events. Biochemical Systematics and Ecology, 54 : 316 - 325. doi: 10.1016/j.bse.2014.02.017

Williams DM (2014) ‘There are two kinds of light — the glow that illuminates, and the glare that obscures’ (James Thurber).. The Systematist, 36 : 23 - 23.

Levkov Z, Williams DM (2014) Observations on Caloneis Cleve (Bacillariophyceae) species from the ancient lakes Oh rid and Prespa. NOVA HEDWIGIA, 141 - 158. doi: 10.1127/1438-9134/2014/008

Riaux-Gobin C, COMPÈRE P, ROMERO OE, WILLIAMS DM (null) Cocconeis pinnata W. Gregory ex Greville (Bacillariophyta): Lectotypification and an emended description after examination of type material and South Pacific specimens. Phytotaxa, 156 (3) : 81 - 81. doi: 10.11646/phytotaxa.156.3.1

Williams DM (2013) Why is Synedra berolinensis so hard to classify? More on monotypic taxa. PHYTOTAXA, 127 (1) : 113 - 127.

Ebach MC, Williams DM (2013) E quindi uscimmo a riveder le stelle. Cladistics, 29 (3) : 227 - 227. doi: 10.1111/cla.12004

EBACH MC, WILLIAMS DM, VANDERLAAN TA (null) Implementation as theory, hierarchy as transformation, homology as synapomorphy. Zootaxa, 3641 (5) : 587 - 587. doi: 10.11646/zootaxa.3641.5.7

Hamilton PB, Williams DM, Sterrenburg F (2013) Some notes on locating specimens in the microscope. Diatom Research, 28 (4) : 517 - 518. doi: 10.1080/0269249x.2013.821426

PAVLOV A, LEVKOV Z, WILLIAMS DM, EDLUND MB (null) Observations on <i>Hippodonta</i> (Bacillariophyceae) in selected ancient lakes. Phytotaxa, 90 (1) : 1 - 1. doi: 10.11646/phytotaxa.90.1.1

Rieppel O, Williams DM, Ebach MC (2013) Adolf Naef (1883–1949): On Foundational Concepts and Principles of Systematic Morphology. Journal of the History of Biology, 46 (3) : 445 - 510. doi: 10.1007/s10739-012-9338-4

Tuji A, WILLIAMS DM (null) Fragilaria vaucheriae - intermedia species complex. Journal of the National Museum of Tokyo (Botany),

Vanderlaan TA, Ebach MC, Williams DM, Wilkins JS (2013) Defining and redefining monophyly: Haeckel, Hennig, Ashlock, Nelson and the proliferation of definitions. Australian Systematic Botany, 26 (5) : 347 - 347. doi: 10.1071/sb13031

Gomes DF, Caldas O, da Silva EM, Gell PA, Williams DM (2012) Father Zimmermann (1871–1950): the first Brazilian diatomist. Diatom Research, 27 (3) : 177 - 188. doi: 10.1080/0269249x.2012.698646

JARVIS C, WILLIAMS DM (2012) From the Beginning to the End: The Keepers of Botany, 1836-2012. 4 - 13.

Karthick B, Williams DM (2012) The International Code for Nomenclature for algae, fungi and plants - a significant rewrite of the International Code of Botanical Nomenclature. CURRENT SCIENCE, 102 (4) : 551 - 552.

Levkov Z, Williams DM (2012) Checklist of diatoms (Bacillariophyta) from Lake Ohrid and Lake Prespa (Macedonia), and their watersheds. PHYTOTAXA, 45 : 1 - 76.

Levkov Z, Williams DM (2011) Fifteen new diatom (Bacillariophyta) species from Lake Ohrid, Macedonia. PHYTOTAXA, 30 : 1 - 41.

Nagumo T, Matsuoka T, Tanaka J, WILLIAMS DM (2012) Research on the diatom slides of Wallich housed in Natural History Museum, UK. Bulletin of the Nippon Dental University, 42 : 12 - 15.

Sterrenburg FAS, Hamilton P, Williams D (2012) Universal coordinate method for locating light-microscope specimens. Diatom Research, 27 (2) : 91 - 94. doi: 10.1080/0269249x.2012.688493

Williams DM (2012) Diatoma moniliforme: Commentary, relationships and an appropriate name. NOVA HEDWIGIA, 255 - 261.

Williams DM, Ebach MC (2012) Confusing homologs as homologies: a reply to “On homology”. Cladistics, 28 (3) : 223 - 224. doi: 10.1111/j.1096-0031.2011.00387.x

Williams DM, Jarvis C, Seberg O, Vane-Wright RI (2011) Chris Humphries (1947-2009): botanist, cladist and biogeographer: an appreciation. Cladistics, 27 (3) : 223 - 229. doi: 10.1111/j.1096-0031.2011.00359.x

Christenhusz MJM, Baker W, Chase MW, Fay MF, Lehtonen S, Van Ee B, Von Konrat M, Lumbsch T, Renzaglia KS, Shaw J, Williams DM, Zhang Z-Q (2011) The first anniversary of Phytotaxa in the International Year of Biodiversity. PHYTOTAXA, 15 : 1 - 8.

Ebach MC, Williams DM (2011) A Devil's Glossary for Biological Systematics. HISTORY AND PHILOSOPHY OF THE LIFE SCIENCES, 33 (2) : 249 - 257.

Ebach MC, WILLIAMS DM (2011) Commentary and perspectives: A Devil's glossary for biological systematics. History and Philosophy of the Life Sciences, 33 : 249 - 257.

EBACH MC, DE CARVALHO MR, WILLIAMS DM (null) Opening Pandora’s Molecular Box. Zootaxa, 2946 (1) : 60 - 60. doi: 10.11646/zootaxa.2946.1.13

Jüttner I, COX EJ, Kelly M, Mann DG, WILLIAMS DM (2011) Freshwater diatom flora of the British Isles. The Phycologist, 80 :

Mooi RD, Williams DM, Gill AC (2011) Numerical cladistics, an unintentional refuge for phenetics-a reply to Wiley et al.. ZOOTAXA, 17 - 28.

Patterson C, Williams DM, Gill AC (2011) Adventures in the fish trade. ZOOTAXA, 118 - 136.

Williams DM (2011) Additions to and comments on the bibliography of Robert Ross. Diatom Research, 26 (4) : 317 - 318. doi: 10.1080/0269249x.2011.630895

Williams DM (2011) Synedra, Ulnaria: definitions and descriptions – a partial resolution. Diatom Research, 26 (2) : 149 - 153. doi: 10.1080/0269249x.2011.587646

Williams DM, Ebach MC (2012) “Phenetics” and its application. Cladistics, 28 (3) : 229 - 230. doi: 10.1111/j.1096-0031.2011.00383.x

WILLIAMS DM, Gill AC (2011) Editorial. ‘Adventures in the fish trade’ by Colin Patterson, [edited and with an introduction by David M. Williams & Anthony C. Gill.]. Zootaxa, 2946 : 118 - 136.

WILLIAMS DM, Kociolek JP (2011) An overview of diatom classification with some prospects for the future, In: The Diatom World, Sebach J, Kociolek JP (Eds). null : 47 - 91.

Ebach MC, Williams DM (2010) Aphyly: A Systematic Designation for a Taxonomic Problem. Evolutionary Biology, 37 (2-3) : 123 - 127. doi: 10.1007/s11692-010-9084-5

Toyoda K, Nagumo T, Williams DM (2010) A NEW MARINE MONORAPHID SPECIES, ACHNANTHES PSEUDOLONGIPES SP NOV., FROM MIYAGI, JAPAN. DIATOM RESEARCH, 25 (1) : 185 - 193.

Ebach MC, WILLIAMS DM (2010) Review - Systematics and Biogeography: Cladistics and Vicariance.-Gareth Nelson and Norman I. Platnick. Columbia University Press, 1981. xi+567 pp. ISBN 0-231-04574-3 (hardback).. Systematic Biology, 59 : 612 - 614.

Li Y, Williams DM, Metzeltin D, Patrick Kociolek J, Gong Z (2010) TIBETIELLA PULCHRAGEN. NOV. ET SP. NOV., A NEW FRESHWATER EPILITHIC DIATOM (BACILLARIOPHYTA) FROM RIVER NUJIANG IN TIBET, CHINA. Journal of Phycology, 46 (2) : 325 - 330. doi: 10.1111/j.1529-8817.2009.00776.x

Reid G, Williams DM (2010) NOTES ON THE GENUS SEMIORBIS PATRICK WITH A DESCRIPTION OF A NEW SPECIES. DIATOM RESEARCH, 25 (2) : 355 - 365.

Tuji A, WILLIAMS DM, SIMS PA, Tanimura Y (null) An Illustrated Catalogue of Type Specimens from the H.M.S. Challenger Voyage in Castracane’s Slide Collection in the Natural History Museum, London. JOINT HAECKEL and EHRENBERG PROJECT: Reexamination of the Haeckel and Ehrenberg Microfossil Collections as a Historical and Scientific Legacy [Text to accompany exhibition catalogue], In: National Museum of Nature and Science Monographs, Tanimura Y, Aita Y (Eds). null : Tokyo. 7 - 11.

Williams DW, Kociolek JP (2010) Towards a comprehensive diatom classification and phylogeny (Bacillariophyta). Plant Ecology and Evolution, 143 (3) : 265 - 270. doi: 10.5091/plecevo.2010.401

Williams DM, Kociolek JP (2010) CLASSIFICATIONS OF CONVENIENCE: THE MEANING OF NAMES. DIATOM RESEARCH, 25 (1) : 213 - 216.

Williams DM, Morales EA (2010) PSEUDOSTAUROSIRA MEDLINIAE A NEW NAME FOR PSEUDOSTAUROSIRA ELLIPTICA (GASSE) JUNG ET MEDLIN. DIATOM RESEARCH, 25 (1) : 225 - 226.

WILLIAMS DM (2010) Amphorotia hispida.. http://www.nhm.ac.uk/nature-online/species-of-the-day/collections/collecting/amphorotia-hispida/index.html :

WILLIAMS DM (2010) The diatom genus Tetracyclus (Bacillariophyta): A Checklist for the Diatom Genus Tetracyclus Ralfs (Bacillariophyta), with Revised Descriptions, Types, Distributions and Bibliography, a resource for diatomists, stratigraphers and (palaeo)biogeographers.. http://tetracyclus.myspecies.info/ :

WILLIAMS DM (2010) Numerical Taxonomy and the Port of Last Resort.. The Systematist, 32 : 11 - 12.

WILLIAMS DM (2010) Review - Plant Taxonomy: The Systematic Evaluation of Comparative Data, 2nd edition.-Tod F. Stuessy, editor. Columbia University Press, 2009. (hardback) 565 pp. ISBN 978-0-231-14712-5. Systematic Biology, 59 : 608 - 610.

WILLIAMS DM, BRODIE J (2010) (170) Proposal to eliminate the Latin requirement for the valid publication of names of non-fossil algae.. Taxon, 59 :

WILLIAMS DM, EBACH MC (2010) Molecular systematics and the ‘blender of optimization’: is there a crisis in systematics?. Systematics and Biodiversity, 8 (4) : 481 - 484. doi: 10.1080/14772000.2010.530303

WILLIAMS DM, KNAPP S (2010) Beyond cladistics: the branching of a paradigm. University of California Press : Berkeley.

Williams DM (2009) 'Araphid' diatom classification and the 'absolute standard'. ACTA BOTANICA CROATICA, 68 (2) : 455 - 463.

Williams DM, Ebach MC (2009) What, Exactly, is Cladistics? Re-writing the History of Systematics and Biogeography. Acta Biotheoretica 57 (1-2) : Springer Science and Business Media LLC : 249 - 268. doi: 10.1007/s10441-008-9058-5

Ebach MC, Williams DM (2009, 12 2) How objective is a definition in the subspecies debate?. Nature. 457 (7231) : Springer Science and Business Media LLC : 785 - 785. doi: 10.1038/457785c

Karthick B, Toyoda K, Ramachandra TV, Williams DM (2009) A NOTE ON THE IDENTITY OF CERATONEIS IYENGARII GONZALVES & GANDHI (FRAGILARIOPHYCEAE, BACILLARIOPHYTA). DIATOM RESEARCH, 24 (1) : 233 - 236.

Stachura-Suchoples K, Williams DM (2009) Description ofConticribra tricircularis, a new genus and species of Thalassiosirales, with a discussion on its relationship to other continuous cribra species ofThalassiosiraCleve (Bacillariophyta) and its freshwater origin. European Journal of Phycology, 44 (4) : 477 - 486. doi: 10.1080/09670260903225431

Stachura-Suchoples K, WILLIAMS DM (2009) A hypothesis on the origin of continuous cribra species in Thalassiosira sensu lato: Fossil and molecular evidence. Phycologia, 48 :

Stachura-Suchoples K, WILLIAMS DM, Jahn R (2009) On extinct, freshwater taxa in the genus Thalassiosira with observations on Thalassiosira species from Pliocene deposit in Oregon, U.S.A.. Diatomededelingen, 33 :

Toyoda K, Tanaka J, WILLIAMS DM (2009) A new brackish water diatom, Achnanthes secretitaeniata sp. nov. from Japan. Journal of Japanese Botany, 84 : 19 - 26.

Tuji A, WILLIAMS DM (null) Type Examination of Japanese Diatoms Described by Friedrich Meister (1913) from Lake Suwa. Bulletin of the National Science Museum, series B (Botany), 33 : 69 - 79.

Williams DM (2009) The identity of Tetracyclus constrictus (Bacillariophyceae) and a description of Tetracyclus bradburyii, a new miocene species. Annales de Paléontologie, 95 (1) : 37 - 51. doi: 10.1016/j.annpal.2008.12.003

Williams DM, Chudaev DA, Gololobova MA (2009) PUNCTASTRIATA GLUBOKOENSIS SPEC. NOV., A NEW SPECIES OF 'FRAGILARIOID' DIATOM FROM LAKE GLUBOKOE, RUSSIA. DIATOM RESEARCH, 24 (2) : 479 - 485.

Williams DM, Reid G (2009) New species in the genus Colliculoamphora Williams & Reid (Bacillariophyceae) with Commentary on species concepts in diatom taxonomy. NOVA HEDWIGIA, 185 - 199.

WILLIAMS DM (2009) Chris Humphries (1947-2009) [Obituary]. Frontiers in Biogeography, 1 : 29 - 31.

WILLIAMS DM (2009) What does endemicity mean in micro-organisms? Program & Abstracts. 1st Meeting of Biosyst EU. Systematics 2009, 10-14 August 2009 :

WILLIAMS DM (2009) Systema naturae: Letters to Linnaeus, In: Letters to Linnaeus, Knapp S, Wheeler QD (Eds). Linnean Society :

WILLIAMS DM, Kociolek JP (2009) Towards a comprehensive diatom classification: The role of fossils. Van de Vijer B, Coquyt C (Eds). Diatom Taxonomy in the 21st Century. Symposium in honour of Henri Van Heurck, 23-26 August 2009, 45 : Scripta Botanica Belgica : Meise, Belgium.

Ebach MC, Gill AC, Williams DM (2008) Reply, a future for astrobiogeography. Astrophysics and Space Science, 317 (3-4) : 147 - 147. doi: 10.1007/s10509-008-9921-5

Ebach MC, Gill AC, Williams DM (2008) The pitfalls of astrobiogeography. Astrophysics and Space Science, 317 (3-4) : 143 - 144. doi: 10.1007/s10509-008-9922-4

Ebach MC, Morrone JJ, Williams DM (2007) A new cladistics of cladists. Biology & Philosophy, 23 (1) : 153 - 156. doi: 10.1007/s10539-007-9069-7

Ebach MC, Morrone JJ, WILLIAMS D (2008) An Outline of the Foundations of Systematics and Biogeography. History and Philosophy of the Life Sciences, 29 : 21 - 24.

Ebach MC, Williams DM, Gill AC (2008) O Cladistics, Where Art Thou?. Cladistics, 24 (6) : 851 - 852. doi: 10.1111/j.1096-0031.2008.00225.x

Reid G, Williams DM (2008) The diatom slide collection and bibliography of the reverend Richard Fraser Bastow (C. 1888-1(st) October 1960). DIATOM RESEARCH, 23 (1) : 117 - 128.

Reid G, WILLIAMS D, Kusber WH, Jahn R (2008) Some commentary on molecules and morphology, species and higher taxa in diatoms, with a note on the relationships of the genus Cistula Cleve.. Proceedings of the 1st Central European Diatom Meeting 2007, Botanic Garden and Botanical Museum Berlin-Dahlem : Freie Universität Berlin.

Toyoda K, WILLIAMS DM, Tanaka J, Nagumo T (2008) Nomenclatural problem on Conferva armillaris Müller (Bacillariophyta). Bulletin of the Nippon Dental University, 37 : 65 - 70.

Tuji A, Williams DM (2008) EXAMINATION OF TYPE MATERIAL OF FRAGILARIA MESOLEPTA RABENHORST AND TWO SIMILAR, BUT DISTINCT, TAXA. DIATOM RESEARCH, 23 (2) : 503 - 510.

Tuji A, WILLIAMS DM (2008) Typification and type examination of Synedra familiaris Kütz and related taxa. Diatom Research, 24 : 25 - 29.

Tuji A, WILLIAMS DM (2008) Examination of types in the Fragilaria pectinalis - capitellata species complex. Witkowski A (Eds). Proceedings of the 19th International Diatom Symposium, Bristol: Biopress Limited : 125 - 139.

Williams DM (2008) New names for three fossil species in the genus Tetracyclus Ralfs from Shangu County, Inner Mongolia, PR China. DIATOM RESEARCH, 23 (1) : 249 - 253.

Williams DM, Ebach MC (2008) Evolutionary theory: don't skimp on teaching its history. Nature, 453 (7196) : 719 - 719. doi: 10.1038/453719b

WILLIAMS DM (2008) Buffon’s orders. Times :

WILLIAMS DM (2008) Studies on species of the genus Tetracyclus (Bacillariophyta, Diatomaceae), with recognition of a ‘cruciform’ sub-group, and comments on their paleogeography. Micropaleontology, 53 : 1 - 9.

WILLIAMS DM (2008) The Diatoms of Lake Baikal and the Space Invaders of Siberia. The British Phycological Society Annual Jubilee Meeting, Programme and Abstracts,

WILLIAMS DM (2008) What, exactly, is congruence? ‘araphid’ diatom classification and multiple datasets. 20th International Diatom Symposium,

WILLIAMS DM, Ebach MC, Wheeler QD (2008) Beyond Belief: The Steady Resurrection of Phenetics. London LSO (Eds). Beyond Cladistics, A Festschrift for Chris Humphries,

WILLIAMS DM, REID G (2008) The type material of Peronia fibula: morphology, systematics and relationships. Witkowski A (Eds). Proceedings of the 19th International Diatom Symposium, Biopress Limited, Bristol :

Ebach MC, Williams DM (2007) An outline of the foundations of systematics and biogeography. HISTORY AND PHILOSOPHY OF THE LIFE SCIENCES, 29 (1) : 87 - 91.

Toyoda K, WILLIAMS D (2007) Diatom Types and herbaria. Aquabiology, 169 : 124 - 128.

Valdecasas AG, WILLIAMS D, Wheeler QD (2007) ‘Integrative taxonomy’ then and now: a response to Dayrat(2005). Biological Journal of the Linnean Society, 93 : 211 - 216.

Williams DM (2007) Paleogeographic impact of a newly described 'cruciform' sub-group of Tetracyclus (Bacillariophyta, Diatomaceae). Micropaleontology, 53 (5) : 421 - 429. doi: 10.2113/gsmicropal.53.5.421

Williams DM (2007) Diatom phylogeny: Fossils, molecules and the extinction of evidence. Comptes Rendus Palevol, 6 (6-7) : 505 - 514. doi: 10.1016/j.crpv.2007.09.016

Williams DM (2007) Ernst Haeckel and Louis Agassiz: Trees that bite and their geographical dimension, In: null, null : 1 - 59.

Williams DM, Ebach MC (2007) Heterology: the shadows of a shade. Cladistics, 23 (1) : 84 - 89. doi: 10.1111/j.1096-0031.2006.00135.x

Williams DM, Kociolek JP (2007) Pursuit of a natural classification of diatoms: History, monophyly and the rejection of paraphyletic taxa. European Journal of Phycology, 42 (3) : 313 - 319. doi: 10.1080/09670260701419921

WILLIAMS DM (2007) Whatever Happened To Cladistics?. The Systematist, 28 : 19 - 21.

WILLIAMS DM (2007) Richard Owen (1804-1892), In: Great Natural Historians, Huxley R (Eds). Thames and Hudson/ The Natural History Museum. :

WILLIAMS DM (2007) Jean Louis Rodolphe Agassiz (1807-1873), In: Great Natural Historians, Huxley R (Eds). Thames and Hudson/ The Natural History Museum. : London.

WILLIAMS DM (2007) Classification and diatom systematics: The past, the present and the future, In: Unravelling the Algae, Brodie J, Lewis J (Eds). CRC Press :

WILLIAMS DM, Ebach MC (2007) The Foundations of Comparative Biology.[Preface by Professor Gareth Nelson]. Kluwer Academic-Springer :

Williams DM, Reid G (2006) Fossils and the tropics, the Eunotiaceae (Bacillariophyta) expanded: A new genus for the Upper Eocene fossil diatomEunotia reediiand the recent tropical marine diatomAmphora reichardtiana. European Journal of Phycology, 41 (2) : 147 - 154. doi: 10.1080/09670260600628564

Cox EJ, Williams DM (2006) Systematics of naviculoid diatoms (Bacillariophyta): A preliminary analysis of protoplast and frustule characters for family and order level classification. Systematics and Biodiversity, 4 (4) : 385 - 399. doi: 10.1017/s1477200006001940

COX ER, SIMS PA, WILLIAMS DM (2006) [Obiturary] Robert Ross (1912-2005). Diatom Research, 21 : 479 - 488.

Ebach MC, Williams DM, Morrone JJ (2006) Paraphyly is bad taxonomy. TAXON, 55 (4) : 831 - 832. doi: 10.2307/25065678

Ebach MC, WILLIAMS DM (2006) Perspectives: Zangerl and the Zeitgeist. History and Philosophy of the Life Sciences, 28 : 51 - 54.

Ebach MC, WILLIAMS D, Morrone JJ (2006) Getting Rid of Origins. Rivista di Biologia/Biology Forum, 99 : 360 - 365.

Levkov Z, Williams DM (2006) Two new species of Diatoma from Lakes Ohrid and Prespa, Macedonia. DIATOM RESEARCH, 21 (2) : 281 - 296.

REID G, WILLIAMS DM (2006) Science updates. 42 : : 15 - 16.

REID G, WILLIAMS DM (2006) News: World’s oldest lake contains world’s newest genus. http://www.nhm.ac.uk/about-us/news/2006/apr/news_7901.html. :

REID G, WILLIAMS DM (2006) Morphology and the relationships of the genus Semiorbis in the Eunotiales. 19th International Diatom Symposium, Abstract book,

Tanimura Y, Tsuji A, Sakai T, Aita Y, Suzuki N, Ogane K, Young J, WILLIAMS DM, Lazarus D, Breidbach O, Bach T (2006) Joint Haeckel and Ehrenberg Project - A taxonomic reexamination of the Haeckel and Ehrenberg microfossil collections as a historical and scientific legacy. Research Report of the Museum Director General’s Support Program in 2004 -2006, The National Science Museum, Tokyo. 1 - 24.

Toyoda K, COX EJ, SIMS PA, WILLIAMS DM (2006) (1718) Proposal to conserve Achnanthes brevipes (Bacillariophyceae) against A. adnata, A. baccillarioides and A. dubia, with a conserved type. Taxon, 55 : 527 - 528.

Toyoda K, Tanaka J, WILLIAMS DM (2006) Morphological notes on the marine diatom Achnanthes longipes C.A. Agardh from Japanese material. Diatom Research, 22 : 27 - 33.

Toyoda K, Williams DM, Tanaka J, Nagumo T (2006) Morphological investigations of the frustule, perizonium and initial valves of the freshwater diatom Achnanthes crenulata Grunow (Bacillariophyceae). Phycological Research, 54 (3) : 173 - 182. doi: 10.1111/j.1440-1835.2006.00420.x

Tuji A, Williams DM (2006) Examination of the type material of Synedra rumpens = Fragilaria rumpens, Bacillariophyceae. Phycological Research, 54 (2) : 99 - 103. doi: 10.1111/j.1440-1835.2006.00414.x

Tuji A, Williams DM (2006) Typification of Conferva pectinalis O. F. Müll. ( Bacillariophyceae ) and the identity of the type of an alleged synonym, Fragilaria capucina Desm.. TAXON, 55 (1) : 193 - 199. doi: 10.2307/25065541

Tuji A, WILLIAMS DM (2006) The taxonomy and distribution of Denticula kuetzingii Grunow, observed in Izu Peninsula, Japan. Memoirs of the National Science Museum, 42 : 7 - 14.

Tuji A, WILLIAMS DM (2006) Type examination of the freshwater centric diatom Aulacoseira pusilla (F. Meister) Tuji et Houki. Diatom, 22 : 70 - 73.

Tuji A, WILLIAMS DM (2006) The taxonomy of Fragilaria vaucheriae and related species. 19th International Diatom Symposium, Abstract book,

Williams DM (2006) Some notes on the classification of Fragilaria, Synedra and their sub-groups. NOVA HEDWIGIA, 17 - 33.

Williams DM, Ebach MC (2006) The data matrix. GEODIVERSITAS, 28 (3) : 409 - 420.

Williams DM, Reid G (2006) Diatom biogeography and water babies: The search for meaning among the protists. DIATOM RESEARCH, 21 (2) : 457 - 462.

WILLIAMS DM (2006) Darwin and diatoms. Science First Hand, 5 :

WILLIAMS DM (2006) Review of : Ron Amundson, 2005. The Changing Role of the Embryo in Evolutionary Thought. Roots of Evo-Devo. Cambridge University Press, Cambridge. [Book review]. The Systematist, 27 : 15 - 19.

WILLIAMS DM (2006) Otto Kleinschmidt (1870-1954), Biogeography and the ‘origin’ of species: From Formenkreis to Progression Rule. Biogeographia, 1 : 3 - 9.

WILLIAMS DM, Khursevich GK, Fedenya SA, Flower RJ (2006) The fossil record in Lake Baikal: Comments on the diversity and duration of some benthic species, with special reference to the genus Tetracyclus, In: Proceedings of the 18th International Diatom Symposium, Poland, 2004, Witkowski A (Eds). BioPress Ltd. : Bristol.

WILLIAMS DM, Reid G (2006) Dealing with large taxonomic groups: Diatoms species and geography, In: Towards the Tree of Life: The Taxonomy and Systematics of Large and Species Rich Taxa, Hodkinson TR, Parnell JAN (Eds). CRC Press : Boca Raton. 305 - 322.

WILLIAMS DM, REID G (2006) Fossils and the tropics, the Eunotiaceae (Bacillariophyta) expanded: The Upper Eocene fossil diatom Eunotia reedi and the Recent marine diatom Amphora reichardtiana from the tropics. European Journal of Phycology, 41 : 147 - 154.

WILLIAMS DM, REID G (2006) Amphorotia nov. gen., a new genus in the family Eunotiaceae (Bacillariophyceae), based on Eunotia clevei Grunow in Cleve et Grunow 1880. Diatom Monographs, 6 : 150 - figs.

WILLIAMS DM, REID G (2006) Examination of Type Material of Peronia fibula with Comments on its Relationships. 19th International Diatom Symposium, Abstract book,

Williams DM, Ebach MC (2005) Drowning by Numbers: Rereading Nelson's “Nullius in Verba”. The Botanical Review, 71 (4) : 415 - 430. doi: 10.1663/0006-8101(2005)071[0415:dbnrnn]2.0.co;2

Williams DM, Ebach MC, Wheeler Q (2005) 150 Reasons for Paraphyly: A Response. Taxon, 54 (4) : 858 - 858. doi: 10.2307/25065471

Ebach MC, Humphries CJ, Newman RA, Williams DM, Walsh SA (null) Assumption 2: opaque to intuition?. Journal of Biogeography, 32 (5) : 781 - 787. doi: 10.1111/j.1365-2699.2005.01283.x

Ebach MC, Williams DM (2005) Molecular systematics is not genetics. RIVISTA DI BIOLOGIA-BIOLOGY FORUM, 98 (3) : 373 - 376.

John DM, Reid G, Williams MD (2005) Microalgae, In: The Emirates A Natural History, Hellyer P, Aspinal S (Eds). null : 167 - 167.

JOHN DM, REID G, WILLIAMS DM (2005) Microalgae, In: The Emirates A Natural History, Hellyer P, Aspinall S (Eds). Trident Press :

REID G, WILLIAMS DM (2005) News: Museum receives a unique collection of diatoms. http://www.nhm.ac.uk/about-us/news/2005/nov/news_7080.html. :

REID G, WILLIAMS DM (2005) Phylum: Bacillariophyta (Diatoms), In: The Emirates A Natural History, Hellyer P, Aspinall S (Eds). Trident Press :

Toyoda K, Cox EJ, Sims PA, Williams DM (2005) The typification of achnanthes bory based on Echinella stipitata Lyngbye, with an account of the morphology and fine structure of Lyngbye's species. DIATOM RESEARCH, 20 (2) : 375 - 386.

TOYODA K, Nagumo T, Tanaka J, WILLIAMS DM (2005) Taxonomy and fine structure of a marine diatom Achnanthes grunowii (Grunow) nom. nov.. Japanese Journal of Botany, 80 : 1 - 8.

WILLIAMS DM (2005) Ernst Haeckel and Louis Agassiz: Trees that bite and their geographic dimension. Programme & Abstracts of the 5th Biennial Conference of the Systematics Association,

WILLIAMS DM (null) Supertrees, Components and Three-item Data, In: Supertrees and their uses, Bininda-Emonds O (Eds). Kluwer Press : 389 - 408.

WILLIAMS DM, Ebach MC (2005) Drowning by Numbers: A new view on numerical phylogenetics. Botanical Reviews, 71 : 355 - 387.

WILLIAMS DM, Ebach MC, WHEELER Q (2005) 150 reasons for paraphyly. Taxon, 54 :

WILLIAMS DM, REID G (2005) The Sino-Siberian distribution of Eunotia clevei and its relatives, from Lake Baikal to the Mekon Delta: the union of taxonomy, biogeography and ecology. Memoirs of the California Academy of Sciences, 56 : 179 - 187.

Williams DM, Ebach MC (null) The reform of palaeontology and the rise of biogeography - 25 years after ‘ontogeny, phylogeny, paleontology and the biogenetic law’ (Nelson, 1978). Journal of Biogeography, 31 (5) : 685 - 712. doi: 10.1111/j.1365-2699.2004.01063.x

Ebach MC, Williams DM (2004) Congruence and language. TAXON, 53 (1) : 113 - 118. doi: 10.2307/4135495

Ebach MC, Williams DM (2004) Classification. TAXON, 53 (3) : 791 - 794. doi: 10.2307/4135452

FOREY PL, WILLIAMS DM (2004) Introduction, In: Milestones in Systematics, WILLIAMS DM, FOREY PL (Eds). Taylor & Francis/CRC Press : Boca Raton. 290 pp. v - viii.

Skabichevskaya NA, Kuzmina AE, Strelnikova NI, Potapova MG, WILLIAMS DM (2004) Alexander Pavlovich Skabichevsky (November 23, 1904 - May 5, 1990): An obituary and bibliography. Diatom Research, 18 : 385 - 398.

Toyoda K, WILLIAMS DM (2004) Description of Achnanthes Bory (Bacillariopheceae) based on Kützing's type slides and materials 1: New morphological information on Achnanthes brevipes var. intermedia (Kützing) Cleve. Diatom, 20 : 159 - 165.

TOYODA K, SIMS PA, COX EJ, WILLIAMS DM (2004) The typification of Achnanthes Bory based on Echinella stipitata Lyngbye with an account of the morphology and fine structure of Lyngbye’s species. 18th International Diatom Symposium, Abstracts,

Williams DM (2004) Homologues and homology, phenetics and cladistics: 150 years of progress. MILESTONES IN SYSTEMATICS 191 - 224.

Williams DM (2003) The type material of Tetracyclus japonicus (Petit) Temp. & H. Perag. and Tetracyclus eckhardii Ehrenb. (Bacillariophyceae). CRYPTOGAMIE ALGOLOGIE, 24 (4) : 333 - 340.

WILLIAMS DM (2004) Biogeography and diatom evolution. The living diatom cell, 100 years A.P. Skabichevsky Memorial, Abstracts : 108 - 109..

WILLIAMS DM (2004) The palaeontological argument revisted: cladistics old and new. 4th Biennial Conference of the Systematics Association, Programme & Abstracts,

WILLIAMS DM (2004) Morphology and molecules in freshwater ‘araphid’ diatoms: Areas of agreement and disagreement, and a way forward. 18th International Diatom Symposium, Abstracts,

WILLIAMS DM (2004) Homology and Homologues, Cladistics and Phenetics: 150 Years of Progress, In: Milestones in Systematics, WILLIAMS DM, FOREY PL (Eds). Taylor & Francis/CRC Press : Boca Raton. 290 pp. 191 - 224.

WILLIAMS DM, EBACH MC (2004) The Reform of palaeontology and the rise of biogeography - 25 Years after ‘Ontogeny, Phylogeny, Paleontology and the Biogenetic law’ (Nelson 1978). Journal of Biogeography, 31 : 1 - 27.

WILLIAMS DM, FOREY PL (2004) Milestones in Systematics. The Systematics Association special volume: no.67 : Taylor & Francis/CRC Press : Boca Raton.

WILLIAMS DM, Metzeltin D (2004) A new species of Synedra Ehrenb. with comments on auxospore and initial cell morphology. Diatom, 20 : 57 - 66.

WILLIAMS DM, REID G (2004) The Sino-Siberian distribution of Eunotia clevei and its relatives, from Lake Baikal to Mekon delta: The union of Taxonomy, biogeography and ecology. Proceedings of the Ecology and Taxonomy workshop, Poland 2002. California Academy of Sciences,

WILLIAMS DM, REID G (2004) Origin and diversity of the diatom genus Eunotia in Lake Baikal: Some preliminary considerations, In: Long Continental Records From Lake Baikal, Kashiwaya K (Eds). Kluwer Academic Publishers : 259 - 269.

Skabichevskaya NA, Kuzmina AE, Strelnikova NI, Potapova MG, Williams DM (2003) Professor Alexander Pavlovich Skabichevsky - November 23, 1904 May 5, 1990 - Obituary. DIATOM RESEARCH, 18 (2) : 385 - 398.

Ebach MC, Humphries CJ, Williams DM (2003) Phylogenetic biogeography deconstructed. Journal of Biogeography, 30 (9) : 1285 - 1296. doi: 10.1046/j.1365-2699.2003.00928.x

Nelson GJ, WILLIAMS DM, EBACH MC (2003) A Question of Conflict: Three Item and Standard Parsimony Compared. Systematics and Biodiversity, 1 : 145 - 149.

REID G, WILLIAMS DM (2003) The morphology of the Gyrosigma balticum complex (Bacillariophyta). The Phycologist, 64 :

REID G, WILLIAMS DM (2003) Systematics of the genus Gyrosigma (Bacillariophyta) including a description of three new species. Phycological Research, 51 : 126 - 142.

REID G, WILLIAMS DM (2003) The Small, the Large and the Unknown: Dealing with diatom diversity. Fourth Biennial Conference of the Systematics Association, Abstracts, 14 - 15.

Williams DM, Humphries CJ (2003) Homology and character evolution. DEEP MORPHOLOGY: TOWARD A RENAISSANCE OF MORPHOLOGY IN PLANT SYSTEMATICS 141 : 119 - 130.

Williams DM, Humphries CJ (2003) Component Coding, Three-Item Coding, and Consensus Methods. Systematic Biology, 52 (2) : 255 - 259. doi: 10.1080/10635150390192753

WILLIAMS DM, HUMPHRIES CJ (2003) Chapter 6. Homology and character evolution, In: Deep morphology: Toward a Renaissance of Morphology in Plant Systematics, Stuessy TF, Mayer V, Hörandl E (Eds). A.R.G. Gantner : Liechtenstein. 326+ix pp. 119 - 130.

Reid G, Williams DM (2002) The marine diatom genus Climaconeis (Berkeleyaceae, Bacillariophyta): Two new species from Abu Dhabi, United Arab Emirates. DIATOM RESEARCH, 17 (2) : 309 - 318.

Williams DM, Reid G, Flower R, Votyakova NE (2002) A new fossil species of Tetracyclus (Bacillariophyceae) from the Miocene deposit of Tunka Ridge, Lake Baikal, Siberia, Russia. DIATOM RESEARCH, 17 (2) : 437 - 443.

Williams DM (2002) Precision and Parsimony. TAXON, 51 (1) : 143 - 149. doi: 10.2307/1554971

COX EILEENJ, WILLIAMS DAVIDM (2000) Systematics of naviculoid diatoms: the interrelationships of some taxa with a stauros. European Journal of Phycology, 35 (3) : 273 - 282. doi: 10.1017/s096702620000281x

Kitching IJ, Forey P, Williams DM (2000) Cladistics, In: Encyclopedia of Biodiversity, Levin S (Eds). Academic Press : San Diego. 677 - 692.

Siebert D (1999) Reclycled Volume 14, Number 4 (1998), pages 339-347:. Cladistics, 15 (1) : 97 - 97. doi: 10.1006/clad.1999.0090

Karpov SA, Kersanach R, Williams DM (1998) Ultrastructure and 18S rRNA gene sequence of a small Heterotrophic flagellate Siluania monomastiga gen. et sp. nov. (bicosoecida). European Journal of Protistology, 34 (4) : 415 - 425. doi: 10.1016/s0932-4739(98)80010-2

Siebert DJ, Williams DM (1998) Recycled. Cladistics, 14 (4) : 339 - 347. doi: 10.1111/j.1096-0031.1998.tb00342.x

Wilkinson M (2002) Cladistics. Wiley Online Library :

Kociolek JP, Rhode K, Williams DM (1997) Taxonomy, ultrastructure and biogeography of the Actinella punctata species complex (Bacillariophyta: Eunotiaceae). NOVA HEDWIGIA, 65 (1-4) : 177 - 193.

(1996) Fossil species of the diatom genusTetracyclus(Bacillariophyta, ‘ellipticus’ species group): morphology, interrelationships and the relevance of ontogeny. Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 351 (1348) : 1759 - 1782. doi: 10.1098/rstb.1996.0156

Platnick NI, Humphries CJ, Nelson G, Williams DM (1996) IS FARRIS OPTIMIZATION PERFECT?: THREE-TAXON STATEMENTS AND MULTIPLE BRANCHING. Cladistics, 12 (3) : 243 - 252. doi: 10.1111/j.1096-0031.1996.tb00011.x

Williams DM, Scotland RW, Humphries CJ, Siebert DJ (1996) Confusion in philosophy: A comment on Williams (1992). Synthese, 108 (1) : 127 - 136. doi: 10.1007/bf00414008

Williams DM (1996) Characters and cladograms. TAXON, 45 (2) : 275 - 283. doi: 10.2307/1224668

Williams DM, Embley TM (1996) MICROBIAL DIVERSITY: Domains and Kingdoms. Annual Review of Ecology and Systematics, 27 (1) : 569 - 595. doi: 10.1146/annurev.ecolsys.27.1.569

Reid G, Huxley R, Williams DM (1995) Preliminary efforts towards a diatom type catalogue with an example from Fragilariforma virescens. PROCEEDINGS OF THE THIRTEENTH INTERNATIONAL DIATOM SYMPOSIUM 423 - 429.

Williams DM (1995) Diatom biogeography: some preliminary considerations. PROCEEDINGS OF THE THIRTEENTH INTERNATIONAL DIATOM SYMPOSIUM 311 - 319.

Williams DM (1994) Combining trees and combining data. TAXON, 43 (3) : 449 - 453. doi: 10.2307/1222721

WILLIAMS DM, ROUND FE (1994) SYSTEMATICS AND SCIENCE - THE ROLE OF AUTHORITY. NOVA HEDWIGIA, 59 (1-2) : 219 - 223.

(1994) Biodiversity at the molecular level: the domains, kingdoms and phyla of life. Philosophical Transactions of the Royal Society of London. Series B: Biological Sciences, 345 (1311) : 21 - 33. doi: 10.1098/rstb.1994.0083

Medlin LK, Williams DM, Sims PA (1993) The evolution of the diatoms (Bacillariophyta). I. Origin of the group and assessment of the monophyly of its major divisions. European Journal of Phycology, 28 (4) : 261 - 275. doi: 10.1080/09670269300650381

Williams DM (1993) Hustedt's study of the diatom species Tetracyclus ellipticus: why history is not just a chronicle of events. Hydrobiologia 269-270 (1) : Springer Science and Business Media LLC : 21 - 30. doi: 10.1007/bf00028000

Scotland R (1993) Multistate Characters and Cladograms:? When are Two Stamens More Similar to Three Stamens than Four? A Reply to Lipscomb. Cladistics, 9 (3) : 343 - 350. doi: 10.1006/clad.1993.1022

Williams DM (1993) A NOTE OF MOLECULAR HOMOLOGY: MULTIPLE PATTERNS FROM SINGLE DATASETS. Cladistics, 9 (2) : 233 - 245. doi: 10.1111/j.1096-0031.1993.tb00221.x

Patterson C, Williams DM, Humphries CJ (1993) Congruence Between Molecular and Morphological Phylogenies. Annual Review of Ecology and Systematics, 24 (1) : 153 - 188. doi: 10.1146/annurev.es.24.110193.001101

Forey PL, Humphries CJ, Kitching IJ, Scotland RW, Siebert DJ, Williams DM (1992) Cladistics: a practical course in systematics. Oxford University Press : Oxford. 191.

ROUND FE, WILLIAMS DM (1992) THE GENERIC STATUS OF SOME DIATOM GENERA WITH SPECIAL REFERENCE TO THE ARAPHID GROUP - A REPLY. NOVA HEDWIGIA, 55 (3-4) : 485 - 500.

Williams DM (1991) PHYLOGENETIC RELATIONSHIPS AMONG THE CHROMISTA: A REVIEW AND PRELIMINARY ANALYSIS. Cladistics, 7 (2) : 141 - 156. doi: 10.1111/j.1096-0031.1991.tb00029.x

Williams DM (1991) Cladistic methods and chromophyte phylogeny. Biosystems 25 (1-2) : Elsevier BV : 101 - 112. doi: 10.1016/0303-2647(91)90016-e

Williams DM, Li J (1990) Observations on the diatom genusTetracyclusRalfs (Bacillariophyta). British Phycological Journal, 25 (4) : 335 - 338. doi: 10.1080/00071619000650371

WILLIAMS DM, SCOTLAND RW, BLACKMORE S (1990) Is there a direct ontogenetic criterion in systematics?. Biological Journal of the Linnean Society, 39 (2) : 99 - 108. doi: 10.1111/j.1095-8312.1990.tb00505.x

Williams DM (1990) Cladistic analysis of some freshwater araphid diatoms (Bacillariophyta) with particular reference toDiatoma andMeridion. Plant Systematics and Evolution, 171 (1-4) : 89 - 97. doi: 10.1007/bf00940597

Williams DM (1990) Distrionella D. M. Williams, nov. gen., a New Araphid Diatom (Bacillariophyta) genus closely related to DiatomaBory. Archiv für Protistenkunde, 138 (2) : 171 - 177. doi: 10.1016/s0003-9365(11)80159-4

Williams DM (1989) Observations on the genus Tetracyclus Ralfs (Bacillariophyta) II. Morphology and taxonomy of some fossil species previously classified in Stylobiblium Ehrenberg. British Phycological Journal, 24 (4) : 317 - 327. doi: 10.1080/00071618900650331

Williams DM (1989) Cavitatus D.M. Williams, nov. gen.: A new genus of fossil diatom (Bacillriophyta) based on Synedra jouseana Sheshukova-Poretskaya. Review of Palaeobotany and Palynology, 58 (2-4) : 357 - 362. doi: 10.1016/0034-6667(89)90092-4

WILLIAMS DM (1988) TABULARIOPSIS, A NEW GENUS OF MARINE ARAPHID DIATOM, WITH NOTES ON THE TAXONOMY OF TABULARIA (KUTZ) WILLIAMS AND ROUND. NOVA HEDWIGIA, 47 (1-2) : 247 - 254.

Williams DM (1987) Observations on the genusTetracyclusRalfs (Bacillariophyta) I. Valve and girdle structure of the extant species. British Phycological Journal, 22 (4) : 383 - 399. doi: 10.1080/00071618700650451

Courses taught

Postgraduate: NERC Taxonomic skills and field techniques for freshwater ecology and quality

MSc: MSc Modern Taxonomy

Invited and keynote speaker

The genus Odontidium (Bacillariophyta) in the Himalaya, 25th International Diatom Symposium: BGBM, Berlin, Germany,