Aspidoceras
| Aspidoceras Temporal range:
| |
|---|---|
| File:Aspidoceratidae - Aspidoceras acanthicum.JPG | |
| Fossil shell of Aspidoceras acanthicum from Jurassic of Madagascar | |
| Scientific classification Edit this classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Cephalopoda |
| Subclass: | †Ammonoidea |
| Order: | †Ammonitida |
| Family: | †Aspidoceratidae |
| Subfamily: | †Aspidoceratinae |
| Genus: | †Aspidoceras Zidttel, 1868 |
Aspidoceras is an extinct ammonoid cephalopod genus belonging to the family Aspidoceratidae.[2]
Taxonomy
[edit | edit source]Aspidoceras, named by Zittel, 1868, is the type genus for the persphictacian family Aspidoceratidae and subfamily Aspidoceratinae in which it is included. It is considered related to genera like Chinamecaceras, Cubaspidoceras, Euaspidoceras, Extranodites, Intranodites, Neaspidoceras, Oligopsychopsis, Orthaspidoceras, Schaireria and Simaspidoceras.[3]
Selected species
[edit | edit source]- † Aspidoceras argobbae Dacque 1905
- † Aspidoceras catalaunicum Loriol 1872
- † Aspidoceras somalicum Dacque 1905
- † Aspidoceras supraspinosum Dacque 1905
Fossil record
[edit | edit source]Aspidoceras mainly lived during the Late Jurassic (Oxfordian) until Cretaceous (Berriasian), with a fairly broad distribution. Fossils have been found in Italy, Chile, Spain, Algeria, Antarctica, Argentina, Ethiopia, France, Germany, Hungary, India, Iran, Madagascar, Portugal, Romania, Russia, Somalia, Switzerland, the United Kingdom, United States and Canada.[3]
Description
[edit | edit source]Aspidoceras has an evolute shell with quadrate-rounded or depressed whorls that have two rows of tubercles, the outer near the middle of the whorl sides. The outer row soon fades in many species. Some species are also ribbed. The venter, or outer rim, is generally wide and broadly arched. Aspidoceras was predated by Euaspidoceras, possibly its ancestor.[4]
See also
[edit | edit source]References
[edit | edit source]- ^ Lua error in Module:Citation/CS1/Configuration at line 2172: attempt to index field '?' (a nil value).
- ^ Mikko's Phylogeny Archive: Ammonitida
- ^ a b c Paleobiology Database
- ^ Crioceratites.free (in French)
Further reading
[edit | edit source]- Arkell, et al.,1957. Mesozoic Ammonoidea; Treatise on Invertebrate Paleontology, Part L (Ammonoidea). Geol Soc of America and Univ Kansas Press. p. L338-339.
Lua error in Module:Taxonbar at line 165: attempt to index field 'wikibase' (a nil value).
