Lyecoceras

Lyecoceras is a gender of slender endogastrically curved orthocerids, so determined by identification of the hyponomic sinus on the concave side. The siphuncle is dorsal of the center, toward the convex side of the shell. The surface has faint longitudinal striae and is encircled by weak annulations.

Lyecoceras
Temporal range: Middle Silurian
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Orthocerida
Superfamily:
Orthocerataceae
Family:
Paraphragmitidae
Genus:
Lyecoceras

Mutvei, 1957

Lyecoceras was first found in the Middle Silurian of Sweden, and since in the Silurian of Sochuan Provence, China.

References
    • Walter C. Sweet, 1964. Nautiloidea - Orthocerida; Treatise on Invertebrate Paleontology, Part K. Geological Society of America


    This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.