Supriya Ghosh (Editor)

Wellsoceras

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Kingdom
  
Animalia

Class
  
Cephalopoda

Order
  
Nautilida

Rank
  
Genus

Phylum
  
Mollusca

Subclass
  
Nautiloidea

Superfamily
  
Tainocerataceae

Wellsoceras is a tetragonoceratid that starts off with an evolute shell in which whorls are in contact, but has a mature living chamber that diverges and becomes free. The whorl section is slightly wider than high and is faintly subquadrangular. Flanks are slightly convex and tend to converge very slightly toward the center. All shoulders are strongly rounded. The suture is straight ventrally or with a slight ventral lobe, well developed lateral lobes, and a broad, low dorsal saddle. The siphuncle is located half way between the center and the ventral margin.

Wellsoceras has been found in Middle Devonian sediments in eastern North America, in Ohio, Indiana, and Ontario.

References

Wellsoceras Wikipedia


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