Eotripteroceras

Eotripteroceras
Temporal range: M Ordovician
Scientific classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: Orthocerida
Superfamily: Orthocerataceae
Family: Orthoceratidae
Subfamily: Michelinoceratinae
Genus: Eotripteroceras
Flower, 1943

Eotripteroceras is a smooth-shelled michelinocerin orthocerid from the middle Ordovician of the state of New York.

The shell of Eotripteroceras is a depressed orthocone with the underside (the venter) flatter than the upper (the dorsum). The siphuncle is below the center -as viewed in horizontal orientation- and is cylindrical in form. Both siphuncle and chambers are empty.

References

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