Early Ordovician – Cretaceous
Palaeocopida is an extinct order of epifaunal suspension feeders.
Characteristics of the Order
- Dorsal margin long and straight.
- Smooth or ornamented surface.
- Lobes, sulci, ventral and adventral structures are quite common.
- Soft parts unknown.
Treatise on Invertebrate Paleontology, Part Q, Arthropoda 3 (1961):
- Dorsal margin long and straight; surface smooth to ornamented; lobes, sulci, ventral and adventral structures common; calcareous inner lamella absent; dimorphic or non-dimorphic; soft parts unknown.