Description
''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. with and (1996), ''Mollusca 4 Revised , Cretaceous Ammonoidea'', vol. 4, in ''Treatise on Invertebrate Paleontology'', Part L (Roger L. Kaesler et el. eds.), Boulder, Colorado: The Geological Society of America & Lawrence, Kansas: University of Kansas Press, pp. 231, 232. 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.Distribution
It is found in Europe and Japan. ''Anahamulina wilcoxensis'' named by Imlay, 1960, is known from California and Oregon.References
External links
*Arkell ''et al.'', 1957. Mesozoic Ammonoidea (L215); Treatise on Invertebrate Paleontology Part L Ammonoidea. Geological Soc. of America and Univ Kansas Press * * * {{Taxonbar, from=Q3728076 Early Cretaceous ammonites of North America Ammonitida genera Ancyloceratoidea