The Echinoid Directory

Contributed by Andreas Kroh, February 2010

Plesiosalenia Smith & Wright, 1990, p. 134

Diagnostic Features	Apical disc large, flat and smooth, with moderately strong sutural pits at triple junctions and mid-length between. Periproct remarkably small, very much maller than suranal plate. Ambulacra bigeminate throughout, with only primary ambulacral tubercles present. Test depressed, wheel-shaped, with four to five interambulacral plates in a column. Primary tubercles on interambulacral plates feebly crenulate; only four scrobicular tubercles per plate, at the corners of the plate. Peristome larger than apical disc.
Distribution	Valanginian of France.
Name gender	feminine
Type	Salenia depressa Gras, 1848, by original designation.
Species Included	P. depressa (Gras, 1848), Valanginian, France. P. foliumquerci (Desor, 1858), Valanginian, France. ? P. taurica (Weber, 1934), Upper Oxfordian, Crimea.
Classification and/or Status	Salenioida; Saleniidae; Saleniinae. Junior homonym of Plesiosalenia Valette 1906.
Remarks	Gras, A. 1848. Description des oursins fossiles du departement de l'Isere, precedee de notions elementaires sur l'organisation & la glossologie de cette classe de Zoophytes, et suive d'une notice geologique sur les divers terrains de l'Isere. 96 pp., Grenoble & Paris (Ch. Vellot et comp. edit. & Victor Masson). Smith, A.B. & Wright, C.W. 1990. British Cretaceous echinoids. Part 2, Echinothurioida, Diadematoida and Stirodonta (1, Calycina). Monographs of the Palaeontographical Society, 143 (583): 101-198.