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Alocolytoceras ✝
| Description | Alocolytoceras is a lytoderatid ammonite with whorls that pass during growth from round to oval, rounded-quadrate, or compressed; with about 19 deep constrictions per whorl, with as many as 21 sharp ribs in between. The shell is evolute. All whorls are visible from either side. From Wikipedia article at https://en.wikipedia.org/wiki/Alocolytoceras, 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 : Ammonoidea : Lytoceratidae : Alocolytoceras | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (PBDB) | Life : Animalia : Mollusca : Cephalopoda : Ammonitida : Lytoceratidae : Alocolytoceras | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Alocolytoceras Hyatt, 1900 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Name Published In | in Eastman-Zittel, Text-Book Palaeont., 1 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 10 | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 197 - 190 Ma Early Jurassic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 172 - 168 Ma Middle Jurassic | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Motility | fast-moving (based on Ammonoidea) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Vision | well-developed (based on Cephalopoda) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Diet | carnivore (based on Ammonoidea) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | aragonite (based on Ammonoidea) | ||||||||||||||||||||||||||||||||||||||||||||||||||||||
| 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/Alocolytoceras |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Aegolytoceras rotundicosta ✝ species | listed (PBDB) | 1 | 190 Ma Early Jurassic | 190 Ma Early Jurassic | |
| Alocolytoceras apertum species | accepted (GBIF) | No associated record in PBDB | |||
| Alocolytoceras audax species | accepted (GBIF) | No associated record in PBDB | |||
| Alocolytoceras coarctatum ✝ species | accepted (GBIF) listed (PBDB) | 3 | 182 Ma Early Jurassic | 180 Ma Early Jurassic | |
| Alocolytoceras dorcadis ✝ species | accepted (GBIF) listed (PBDB) | 4 | 182 Ma Early Jurassic | 182 Ma Early Jurassic | |
| Alocolytoceras grandonense species | accepted (GBIF) | No associated record in PBDB | |||
| Alocolytoceras ophioneum ✝ species | accepted (GBIF) listed (PBDB) | 6 | 182 Ma Early Jurassic | 174 Ma Middle Jurassic | |
| Alocolytoceras rotundicosta species | accepted (GBIF) | No associated record in PBDB | |||
| Alocolytoceras spirorbis species | accepted (GBIF) | No associated record in PBDB | |||
| Alocolytoceras varicosum species | accepted (GBIF) | No associated record in PBDB | |||
| Audaxlytoceras apertum ✝ species | listed (PBDB) | 1 | 190 Ma Early Jurassic | 190 Ma Early Jurassic | |
| Audaxlytoceras audax ✝ species | listed (PBDB) | 17 | 190 Ma Early Jurassic | 190 Ma Early Jurassic | |
| Audaxlytoceras grandonense ✝ species | listed (PBDB) | 6 | 190 Ma Early Jurassic | 190 Ma Early Jurassic | |
| Audaxlytoceras spirorbis ✝ species | listed (PBDB) | ||||
| Audaxlytoceras varicosum ✝ species | listed (PBDB) | 3 | 190 Ma Early Jurassic | 190 Ma Early Jurassic | |
Obsolete Names
| Name | Source | Taxon Rank | Taxonomy |
|---|---|---|---|
| Alocolytocera Dollfus, 1906 | GBIF | genus | Animalia : Mollusca : Cephalopoda : Ammonoidea : Lytoceratidae : Alocolytocera |
Synonymy List
| Year | Name and Author |
|---|---|
| 1925 | Peripleuroceras Tutcher and Trueman |
| 1998 | Audaxlytoceras Géczy and Meister |
| 2002 | Aegolytoceras Sepkoski, Jr. |
| 2002 | Alocolytoceras Sepkoski, Jr. |
| 2002 | Audaxlytoceras Sepkoski, Jr. |
| 2004 | Audaxlytoceras Pallini et al. p. 6 |
| 2005 | Aegolytoceras Venturi et al. p. 92 |
| 2006 | Audaxlytoceras Hillebrandt p. 47 |
| 2008 | Alocolytoceras Bourillot et al. p. 599 |
| 2010 | Alocolytoceras Hoffmann p. 42 |
References
Data courtesy of: PBDB: The Paleobiology Database, Creative Commons CC-BY licenced. , GBIF: the Global Biodiversity Information Facility, various licences, iDigBio, various licences, and EOL: The Encyclopedia of Life (Open Data Public Domain). Because fossils are made of minerals too!
