Belemnitella bulbosa

Belemnitella bulbosa
Temporal range:
Scientific classification Edit this classification
Kingdom: Animalia
Phylum: Mollusca
Class: Cephalopoda
Order: †Belemnitida
Family: †Belemnitellidae
Genus: †Belemnitella
Species:
†B. bulbosa
Binomial name
†Belemnitella bulbosa
Meek & Hayden, 1856

Belemnitella bulbosa is a species of belemnite from the Late Cretaceous of North America. It is known only from two localities - the Pierre Shale and Fox Hills Formations. B. bulbosa had a slender somewhat cylindrical rostrum (guard) with a slightly expanded front opening. Like other members of the genus Belemnitella, it had a dorsal ridge on the rostrum. The phragmocone is about the same size or slightly longer than the rostrum and has an oval cross-section.[1]

References

  1. ^ Neal L. Larson; Steven D. Jorgensen; Robert A. Farrar & Peter L. Larson (1997). Ammonites and the Other Cephalopods of the Pierre Seaway. Geoscience Press, Inc. p. 44. ISBN 0-945005-34-2.


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