The Echinoid Directory

Subfamily Discoidinae Lambert, 1900, p. 49

[nom. corr. pro Discoidesidae]

Diagnosis	Holectypina with: internal ridges on oral surface running along the adradial margins of interambulacral zones (best seen on internal moulds as radiating grooves).
Range	Early Cretaceous (Aptian) to Late Cretaceous (Maastrichtian); Europe.

Diagnosis

Holectypina with:

internal ridges on oral surface running along the adradial margins of interambulacral zones (best seen on internal moulds as radiating grooves).

Range

Early Cretaceous (Aptian) to Late Cretaceous (Maastrichtian); Europe.