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Winnipegoceras

From Wikipedia, the free encyclopedia

Winnipegoceras
Temporal range: M-U Ordovician
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Discosorida
Family: Westonoceratidae
Genus: Winnipegoceras
Foerste, 1928

Winnipegoceras is an extinct nautiloid genus from the Ordovician belonging to the Order Discosorida.

Phylogeny

Winnipegoceras is included in the discosorid family Westonoceratidae and is derived from Westonoceras. Westonoceratidae have mostly medium to large, compressed, exogastric shells with moderately sized siphuncles composed of short folded back septal necks and generally thin connecting rings with swollen bullettes and which contain internal linings. (Flower & Teichert 1957; Teichert 1964)

Description

Winnipegoceras, named by Foerste (1922) for fossils found near Winnipeg in Manitoba, Canada, is known by it large, slender, compressed, strongly curved exogastric shells; long slender body chamber and siphuncle that is slightly removed from the venter which is the outer, longitudinally convex margin. Siphuncle segments are strongly narrowed at the septal foremina, bullettes swollen, parietal and other internal deposits rarely preserved. (ibid)

See also

References

This page was last edited on 4 June 2022, at 01:58
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