Nuculoida

Classification
Phylum: Mollusca
Class: Bivalvia
Order: Nuculoida (Dall, 1889)
Cincinnatian Families: Ctenodontidae, Malletiidae, Praenuculidae

Geologic Range
Ordovician – Recent

Common Paleoecology
Nuculoida is an extant order of slow-moving infaunal deposit feeders

Characteristics of the Order

  • Shell taxodont, equivalve, with closed margins, isomyarian
  • Nacreous or crossed lamellar
  • Ligament generally amphidetic
  • Gills protobranchiate
  • Foot grooved and reptant, not byssiferous in adults

Published Descriptions

Treatise on Invertebrate Paleontology, Part N, Mollusca 6(1 of 3) (1969):

  • Shell taxodont, equivalve, with closed margins, isomyarian; nacreous or crossed lamellar; ligament generally amphidetic; gills protobranchiate; foot grooved and reptant, not byssiferous in adults.

Ctenodontidae


Malletiidae


Praenuculidae