Algerites

Algerites is middle Cretaceous (Cenomanian) anisoceratid ammonoid with a close-coiled adult shell in which the whorls at that stage are in close contact, after starting off with openly coiled whorls, and in which every rib (a character of the family) has a pair of sharp ventral tubercles.

Algerites Temporal range:
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Mollusca
Class:	Cephalopoda
Subclass:	†Ammonoidea
Order:	†Ammonitida
Suborder:	†Ancyloceratina
Family:	†Anisoceratidae
Genus:	†Algerites Pervinquiere, 1910

Algerites, which is found in North Africa, named for the country of Algeria, is thought to be derived from Idiohammites, also an anisoceratid. It (Algerites) differs from Allocrioceras in that the later whorls come together in close contact where as in the latter they remain apart.

The Anisoceratidae to which this genus is assigned is included in the diverse heteromorphic superfamily Turrilitoidea.

References

• Arkell et al., 1957. Mesozoic Ammonoidea, Treatise on Invertebrate Paleontology, Part L, Ammonoidea. Geol. Soc. of America and Univ. Kansas Press.