''Mantelliceras'' is an extinct

ammonoid Ammonoids are extinct, (typically) coiled-shelled cephalopods comprising the subclass Ammonoidea. They are more closely related to living octopuses, squid, and cuttlefish (which comprise the clade Coleoidea) than they are to nautiluses (family N ...

cephalopod A cephalopod is any member of the molluscan Taxonomic rank, class Cephalopoda (Greek language, Greek plural , ; "head-feet") such as a squid, octopus, cuttlefish, or nautilus. These exclusively marine animals are characterized by bilateral symm ...

genus belonging to the

family Family (from ) is a Social group, group of people related either by consanguinity (by recognized birth) or Affinity (law), affinity (by marriage or other relationship). It forms the basis for social order. Ideally, families offer predictabili ...

Acanthoceratidae Acanthoceratidae is an extinct Family (biology), family of Acanthoceratoidea, acanthoceratoid cephalopods in the order Ammonitida, known from the Upper Cretaceous. The type genus is ''Acanthoceras (ammonite), Acanthoceras''. Diagnosis Acanthocer ...

and type for the subfamily Mantelliceratinae, that lived from the Late

Albian The Albian is both an age (geology), age of the geologic timescale and a stage (stratigraphy), stage in the stratigraphic column. It is the youngest or uppermost subdivision of the Early Cretaceous, Early/Lower Cretaceous epoch (geology), Epoch/s ...

to the late

Cenomanian The Cenomanian is, in the International Commission on Stratigraphy's (ICS) geological timescale, the oldest or earliest age (geology), age of the Late Cretaceous epoch (geology), Epoch or the lowest stage (stratigraphy), stage of the Upper Cretace ...

stage of the Late

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

Description

''Mantelliceras'' is characterized by a strongly ribbed, moderately involute shell with a moderately wide umbilicus, and rounded whorl section. The final whorl leaves inner whorls partly exposed. High standing ribs cross over the venter smoothly. Primary ribs arise from the umbilical wall. Secondaries, usually one per intervening space, arise higher on the flanks. Species of ''Mantelliceras'' are known to reach a diameter of about 13 centimeters.

Distribution

Species of ''Mantelliceras have been found in

sediments in

Angola Angola, officially the Republic of Angola, is a country on the west-Central Africa, central coast of Southern Africa. It is the second-largest Portuguese-speaking world, Portuguese-speaking (Lusophone) country in both total area and List of c ...

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, the

United Kingdom The United Kingdom of Great Britain and Northern Ireland, commonly known as the United Kingdom (UK) or Britain, is a country in Northwestern Europe, off the coast of European mainland, the continental mainland. It comprises England, Scotlan ...

, and

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Species

Species of ''Manatelliceras'' include: * ''M. brazoense'' Böse, 1928 * ''M. cantianum'' Spath, 1926 * ''M. charlestoni'' Kellum & Mintz, 1962 * ''M. corroyi'' Fabre, 1940 * ''M. couloni'' (Orbigny, 1850) * ''M. dixoni'' Spath, 1926 * ''M. japonicum'' Matsumoto, Muramoto & Takahashi, 1969 * ''M. lymense'' Spath, 1926 * ''M. mantelli'' Sowerby, 1814 * ''M. picteti'' Hyatt, 1903 * ''M. portalesi'' Kellum & Mintz, 1962 * ''M. saxbii'' Sharpe, 1857 * ''M. wacoense'' Böse, 1928

References

* W.J. Arkell, et al. 1957. Mesozoic Ammonoidea;

Treatise on Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology,'' published from 1953–2007 by the Geological Society of America and the University of Kansas, then 2009–present by the University of Kansas Paleontological Institute, is a definitive multi-authore ...

, Part L, Mollusca 4. Geological Society of America and University of Kansas Press. {{Taxonbar, from=Q1469159 Ammonitida genera Late Cretaceous ammonites of Europe Fossil taxa described in 1903 Ammonites of Europe Albian genus first appearances Cenomanian genus extinctions Acanthoceratidae