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Microbaltoceras

From Wikipedia, the free encyclopedia

Microbaltoceras
Temporal range: Early Ordovician
Scientific classification Edit this classification
Domain: Eukaryota
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: Orthocerida
Family: Baltoceratidae
Genus: Microbaltoceras
Flower (1964)
Species
  • M. minore

Microbaltoceras is an extinct genus of the cephalopod family Baltoceratidae that lived in what would be North America during the Early Ordovician. It was named by Rousseau Flower (1964) and assigned by him to the Baltoceratidae. The type species is Microbaltoceras minore which was found in the Threadgill Member of the Tanyard Formation in Gillespie County, Texas, USA.

The shell of Microbaltoceras is straight (orthconic) and tiny, with the siphuncle in narrow contact with the inner ventral surface. Its inclusion in the Baltoceratidae rather than in the Ellesmeroceratidae is based in large part on the lack of observable diaphragms in the siphuncle. The holotype of Microbaltoceras minore is only 10mm long, essentially all phragmocone.

References

  • R. H. Flower. (1964). The Nautiloid Order Ellesmeroceratida (Cephalopoda). Memoir 12, New Mexico Bureau of Mines and Mineral Resources, Socorro, NM,
This page was last edited on 27 December 2022, at 22:17
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