Kingdom Animalia Class Cephalopoda Order Ammonitida Rank Species | Phylum Mollusca Subclass Ammonoidea Family Acanthoceratidae | |
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Calycoceras asiaticum is an extinct cephalopod species belonging to the subclass Ammonoidea and family Acanthoceratidae.
Contents
They lived during the Cenomanian stage of the Late Cretaceous, from 99.7 to 94.3 Mya.
Subspecies
Description
Shells of Calycoceras asiaticum may reach a diameter of about 20 centimetres (7.9 in). The larger phragmocones may reach 59–72 millimetres (2.3–2.8 in) in diameter. Coiling is moderately involute. All ribs show strong subspinose tubercles. C. asiaticum asiaticum and C. asiaticum spinosum are very similar, the latter has much more robust tuberculation.
Distribution
Calycoceras asiaticum may be found in the Cenomanian of Canada, Southern England, northern and southern France, Spain, Romania, Bulgaria, Tunisia, Madagascar, south India and Japan.
References
Calycoceras asiaticum Wikipedia(Text) CC BY-SA