Bickmorites

Bickmorites
Temporal range: Late Ordovician -Mid Silurian
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Subclass: Nautiloidea
Order: †Tarphycerida
Family: †Barrandeoceratidae
Genus: †Bickmorites
Foerste 1925
Species
  • see text

Bickmorites is an extinct nautiloid cephalopod genus known from the upper Ordovician to the middle Silurian of North America and northern Europe (Norway).

Bickmorites has a gyroconic shell, coiled such that whorls are not in contact, although close. The surface is strongly ribbed; ribs slant dorso-ventrally toward the apex. The siphuncle is narrow, located slightly ventral of the center. Septal necks are straight, making the siphuncle orthochoanitic.

Bickmorites seems to bridge the temporal gap between the Upper Ordovivian barrandeoceratid Antiplectoceras and the Middle Silurian barrandoeceratids Gasconsoceras, Laureloceras, and Savageoceras.

See also

References

  • Walter C. Sweet, 1964. Naautiloidea-Barrandeocerida. Treatise on Invertebrate Paleongology, Part K. Geological Society of America.
  • Bickmorites in Fossilworks gateway,


Stub icon

This prehistoric nautiloid-related article is a stub. You can help Wikipedia by expanding it.