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.
Distribution	Lower Cretaceous (Hauterivian); France.
Name gender	feminine
Type	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.
Remarks	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.