Allotrioceras ✝
| Description | Allotrioceras is a tubular fossil from the Middle Ordovician of the state of New York, collected by Rousseau H. Flower; included by him in the Endocerida and placed in a new family, the Allotrioceratidae. Allotrioceras is characterized by a lateral pair of subequal conical structures, resembling the endocones of endocerids, separated by a straight partition that extends more than half way across from either the dorsal or ventral side, as perceived, and runs along the length. What remains is thought to represent a siphuncle, which ranges from about 8 millimeters (0.3 in) to about 15 millimeters (0.6 in) in diameter. On the basis of diagnosis, inclusion of Allotrioceras and the Allotrioceratidae, for which it is the type, in the endocerida seems at best tentative. From Wikipedia article at https://en.wikipedia.org/wiki/Allotrioceras, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | ||||||||||||||||||||||||||||||||||||||||||
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| Source Data |
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| Rank | genus | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (GBIF) | Life : Animalia : Mollusca : Cephalopoda : Allotrioceratidae : Allotrioceras | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (PBDB) | Life : Animalia : Mollusca : Cephalopoda : Endocerida : Allotrioceratidae : Allotrioceras | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Allotrioceras Flower, 1955 | ||||||||||||||||||||||||||||||||||||||||||
| Name Published In | J. Paleont., 29 | ||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | ||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 2 | ||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 466 - 458 Ma Ordovician | ||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 466 - 458 Ma Ordovician | ||||||||||||||||||||||||||||||||||||||||||
| Motility | actively mobile (based on Endocerida) | ||||||||||||||||||||||||||||||||||||||||||
| Vision | well-developed (based on Cephalopoda) | ||||||||||||||||||||||||||||||||||||||||||
| Diet | carnivore (based on Endocerida) | ||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | aragonite (based on Endocerida) | ||||||||||||||||||||||||||||||||||||||||||
| Primary Reference (PBDB) | J. J. Sepkoski, Jr. 2002. A compendium of fossil marine animal genera. Bulletins of American Paleontology 363:1-560 | ||||||||||||||||||||||||||||||||||||||||||
| Wikipedia | https://en.wikipedia.org/wiki/Allotrioceras |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Allotrioceras bifurcatum ✝ species | accepted (GBIF) listed (PBDB) | 1 | 466 Ma Middle Ordovician | 466 Ma Middle Ordovician |
Synonymy List
| Year | Name and Author |
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| 1955 | Allotrioceras Flower |
| 1964 | Allotrioceras Teichert et al. p. 184 |
| 2002 | Allotrioceras Sepkoski, Jr. |
References
