Cornulitidae

C corrugatus 250px

Classification
Phylum: Mollusca
Class: Tentaculita
Family: Cornulitidae (Fischer, 1962)
Cincinnatian Genus: Cornulites

Geologic Range
Middle Ordovician – Mississippian

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

Description of the Family

  • Small to medium sized tubes of Calcium Carbonate; circular cross section
  • Flexous and ringed
  • rings dominate at some stages of growth; longitudinal strie at others
  • Thick walls with large, rounded cellular cavities
  • Rodlike tapering body of invaginated cones with apices directed toward aperture

Published Descriptions

Treatise on Invertebrate Paleontology, Part W, Vol. 1 (1962):

  • Flexuous, ringed, small to medium-sized tapering tubes of calcium carbonate, with circular cross section; rings dominant in specific stages of growth and longitudinal striae dominant in other stages. Relatively thick walls composed of large, rounded or oval cellular cavities, cells with thin walls and especially conspicuous in transverse rings which are narrower and closer together toward apex. Mold of internal cavity consists of rodlike tapering body of invaginated cones with apices directed toward aperture and is thus homeomorphic with internal molds of Tentaculitidae. Length 5 to 80 mm.

Cornulites