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The Echinoid Directory

Contributed by Andreas Kroh, November 2007

Palaeotropus uniporum Mironov, 2006, p. 117

Diagnostic Features As for type species (P. josephinae Loven, 1872), but differing from it by:
  • unipores throughout on aboral side (double pores in P. josephinae, apart from most adapical plates)
  • labrum reaching second pair of adjoining ambulacral plates
  • ? single gonopore (might be pathological)
  • curved miliary spines
  • third terminal tooth in globiferous pedicellariae (2 in P. josephinae)
  • absence of rostrate pedicellariae
Distribution Atlantis seamount, NE Atlantic Ocean (Academik Mstislav Keldysh, Stat. 521); 1560-1900 m depth.
Type Holotype: Institute of Oceanology, Russian Academy of Sciences, Moscow, No. XV-69-32
Classification and/or Status Spatangoida, Micrasterina, Palaeotropidae.

Species of Palaeotropus.
Remarks Based on a single incomplete specimen and an oral fragment. Intra- and interspecific variation of some of the diagnostic features listed above (e.g. labrum, gonopores) is thus unknown.

Mironov, A. N. 2006. Echinoids from seamounts of the north-eastern Atlantic; onshore/offshore gradients in species distribution. Pp. 96-133 in A. N. Mironov, A. V. Gebruk & A. J. Southward (eds) Biogeography of the North Atlantic Seamounts KMK Scientific Press, Russian Academy of Sciences, P.P. Shirshov Institute of Oceanology, Moscow.