The Echinoid Directory

Alpicidaris Lambert, in Lambert & Thiery, 1910, p. 150

Diagnostic Features
  • Test height ca. 70% diameter; relatively thick-shelled.
  • Apical disc size and plating unknown.
  • Interambulacra with 8-10 plates in a series. Primary tubercles perforate and noncrenulate; areoles ovate at ambitus and adorally, circular adapically. Areoles incised and separated from those above and below except immediately adjacent to the peristome. Mamelons relatively small and platform wide.
  • Scrobicular tubercles differentiated; complete on ambital and adapical plates but confined to adradial and interradial margins adorally. Extrascrobicular zones narrow and only on adradial and interradial sides; tuberculation heterogeneous.
  • Ambulacra narrow and almost straight. Pore zones equal in width to the median tuberculate zone; not incised; pore-pairs conjugate with the two pores widely separated.
  • Perradial zone with enlarged primary tubercle on every third plate adorally and every other plate adapically; all elements reaching the perradius.
  • Peristome ca 50% test diameter; plating unknown.
  • Spines unknown; perignathic girdle not seen.
Lower Cretaceous (Hauterivian); France.
Name gender feminine
Alpicidaris cureti Lambert, 1910, p. 150, by original designation. Syntypes (2 specimens) Museum National d'Histoire Naturelle, Paris J00576
Species Included
  • Only the type species.
Classification and/or Status

Cidaroida, Polycidaridae.

Monotypic; here treated as a subgenus of Paracidaris Pomel, 1883.


Differs from Paracidaris (Anisocidaris) and P. (Paracidaris) in having non-crenulate tubercles.

Lambert, J. & Thiery, P. 1909-1921. Essai de nomenclature raisonnee des echinides. Chaumont, Ferriere.