Phylum: Mollusca
Class: Tentaculita
Family: Tentaculitidae (Walcott, 1886)
Cincinnatian Genus: Tentaculites

Geologic Range
Late Ordovician – Carboniferous

Common Paleoecology
Tentaculitidae is an extinct family of facultatively mobile semi-infaunal suspension feeders

Description of the Family

  • Inner wall has depressed rings at increasing intervals toward aperture
  • Juvenile part septate
  • Juvenile part septa slightly concave toward aperture
  • Exterior rings more uniform in juvenile portion
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Treatise on Invertebrate Paleontology, Part W, Vol. 1 (1962):

  • Inner wall surface with depressed rings spaced at proportionately increasing intervals toward aperture; internal mold appearing as series of inverted invaginated cones. Walls thick, multilayered and pierced by tiny radial canals. Juvenile portion septate, septa slightly concave toward aperture. Exterior rings more uniform in juvenile portion than mature region

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