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About: Turnoceras     Goto   Sponge   NotDistinct   Permalink

An Entity of Type : dbo:Species, within Data Space : dbpedia.org associated with source document(s)

Type: ThingEukaryoteAnimalMolluscaanimaleukaryotemolluscaspecies New Facet based on Instances of this Class

Turnoceras is a genus of Devonian cephalopods belonging to the oncocerid family Nothoceratidae. Its shell is broadly expanding and exogastrically curved such that the flattened dorsum is on longitudinally concave side. Aperture unconstricted with no for the water jet funnel. siphuncle along the outer, ventral, side, with radial, plate-like deposits occupying the interior. Conostichoceras is similar externally, but has a siphuncle with a trapezoidal aspect to its siphuncle segments. Perimecoceras has similar concave siphuncle segments but is tubular in form.