Algerites
Encyclopedia
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 of with openly coiled whorls, and in which every rib (a character of the family) has a pair of sharp ventral tubercles.
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 Turrilitaceae
Cenomanian
The Cenomanian is, in the ICS' geological timescale the oldest or earliest age of the Late Cretaceous epoch or the lowest stage of the Upper Cretaceous series. An age is a unit of geochronology: it is a unit of time; the stage is a unit in the stratigraphic column deposited during the corresponding...
) anisoceratid ammonoid with a close-coiled adult shell in which the whorls at that stage are in close contact, after starting of with openly coiled whorls, and in which every rib (a character of the family) has a pair of sharp ventral tubercles.
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
Allocrioceras
Allocrioceras is an ammonoid cephalopod from the mid-Cretaceous included in the turrilitacean family Anisoceratidae. Its shell is strongly ribbed and is in the form of a widely open spiral.-Classification:...
in that the later whorls come together in close contact where as in the latter they remain apart.
The Anisoceratidae
Anisoceratidae
Anisoceratidae is an extinct family of heteromorph ammonoid cephalopods.-Referenceas:*http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=96545&is_real_user=1...
to which this genus is assigned is included in the diverse heteromorphic superfamily Turrilitaceae
Turrilitaceae
The Turrilitacaeae is a diverse superfamily of Cretaceous ammonites generally considered as heteromorphic and commonly included in the suborder Ancyloceratina...