Anahamulina

Anahamulina is an extinct ammonoid cephalopod genus from the Lower Cretaceous. Named by Hyatt, 1900, Anahamulina is included in the family Ptychoceratidae, which is part of the Turrilitaceae.

Anahamulina
Temporal range: Hauterivian–Barremian[1]
Scientific classification
Kingdom:
Animalia
Phylum:
Mollusca
Class:
Cephalopoda
Subclass:
Ammonoidea
Superfamily:
Turrilitaceae
Family:
Ptychoceratidae
Genus:
Anahamulina

Hyatt, 1900
Species
  • See text

Anahamulina is characterized by an increasingly wide shaft that bends sharply to the opposite direction, at some point ending in a shorter terminal section. The two sections are not in lateral contact. The first, and earlier, shaft has fine, dense, oblique ribs, which in the second, and later, shaft are stronger and more radial.

Two species are recognized. The type Anahamulina subcylindrica, named by Hyatt, 1900, is based on Hamulina subcylindrica d'Orbigny 1850, and is found in Europe and Japan. Anahamulina wilcoxensis named by Imlay, 1960, is known from California and Oregon.

References
  1. Sepkoski, Jack (2002). "Sepkoski's Online Genus Database". Retrieved 2014-05-28.
  • Arkell et al., 1957. Mesozoic Ammonoidea (L215); Treatise on Invertebrate Paleontology Part L Ammonoidea. Geological Soc. of America and Univ Kansas Press
  • The Paleobiology Database Anahamulina


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