Halloceras

Halloceras is a gyroconic rotoceratid from the Lower Devonian of North America, with a subtriangular whorl section, narrow dorsum (on the inner side), divergent flanks, and broad, rounded venter (on the outer side), frills at various growth points, suture with shallow ventral and lateral lobes, and a small siphuncle near the venter.

Halloceras
Temporal range: 391.9–388.1 Ma
↓
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Nautiloidea
Order:
Nautilida
Superfamily:
Tainocerataceae
Family:
Rutoceratidae
Genus:
Halloceras

Hyatt, 1884

Halloceras was named by Hyatt in 1884. The type us Halloceras undulatum.

References
  • Bernhard Kümmel, 1964 Nautiloidea-Nautilida. Treatise on Invertebrate Paleontology, Part K, Mollusca 3. Teichert and Moore, eds. Geol Soc of America and Univ Kansas Press.


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