Callocystitidae

Classification
Phylum: Echinodermata
Class: Rhombifera
Order: Dichoporita
Family: Callocystitidae (Bernard, 1895)
Cincinnatian Genera: Lepadocystis

Geologic Range
Late Ordovician – Late Devonian

Common Paleoecology
Callocystitidae is an extinct family of stationary low-level epifaunal suspension feeders

Description of the Family

  • Ovate, globular, biconvex, or ellipsoidal theca
  • Relatively few rhombs
  • Long ambulacra that extend over theca
  • Column is present

Published Descriptions

Treatise on Invertebrate Paleontology, Part S, Vol. 1(2) (1978):

  • Rhombiferan cystoids provided with distinct pectinirhombs; periproct relatively small, not produced; theca ovate, globular, biconvex, or ellipsoidal, not spindle-shaped or resembling a pentremitel; rhombs relatively few, rarely developed as demirhombs; ambulacra long, extending down over theca; column present.

Lepadocystis