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Geragnostus ✝
| Description | Geragnostus is a genus of very small agnostid trilobites whose fossils are found Ordovician-aged marine strata from Eurasia, North America and Argentina. From Wikipedia article at https://en.wikipedia.org/wiki/Geragnostus, 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,PBDB) | Life : Animalia : Arthropoda : Trilobita : Agnostida : Metagnostidae : Geragnostus | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Geragnostus Howell, 1935 | |||||||||||||||||||||||||||||||||||||||||||||
| Name Published In | J. Paleont., 9 | |||||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 22 | |||||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 501 - 485 Ma Cambrian | |||||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 450 - 444 Ma Paleozoic | |||||||||||||||||||||||||||||||||||||||||||||
| Environment | marine (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Motility | slow-moving (based on Agnostida) | |||||||||||||||||||||||||||||||||||||||||||||
| Vision | blind (based on Metagnostidae) | |||||||||||||||||||||||||||||||||||||||||||||
| Diet | detritivore (based on Agnostida) | |||||||||||||||||||||||||||||||||||||||||||||
| Ontogeny | molting,addition of parts (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Ecospace Comments | BODY SIZE: Data from Whittington et al. (1997). | |||||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | minor spines | |||||||||||||||||||||||||||||||||||||||||||||
| 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/Geragnostus |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Geragnostus (Geragnostella) ✝ subgenus | listed (PBDB) | 6 | 485 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Geragnostus (Geragnostus) ✝ subgenus | listed (PBDB) | 9 | 485 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Geragnostus (Microagnostus) ✝ subgenus | listed (PBDB) | 22 | 501 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Geragnostus (Novoagnostus) ✝ subgenus | listed (PBDB) | 3 | 458 Ma Middle Ordovician | 458 Ma Middle Ordovician | |
| Geragnostus bavaricus species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus bisectus species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus brevis species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus callaveiformis species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus calviformis species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus clusus ✝ species | accepted (GBIF) listed (PBDB) | 2 | 472 Ma Early/Lower Ordovician | 467 Ma Middle Ordovician | |
| Geragnostus contractus species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus explanatus species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus fabius ✝ species | accepted (GBIF) listed (PBDB) | 8 | 472 Ma Early/Lower Ordovician | 468 Ma Middle Ordovician | |
| Geragnostus hoeki species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus howelli species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus insolitus species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus longicollis ✝ species | accepted (GBIF) listed (PBDB) | 7 | 472 Ma Early/Lower Ordovician | 458 Ma Middle Ordovician | |
| Geragnostus maurii species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus micropeltis species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus nesossii species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus neumanni species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus niger species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus reductus species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus tilcuyensis species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus tullbergi species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus vilonii species | accepted (GBIF) | No associated record in PBDB | |||
| Geragnostus wimani species | accepted (GBIF) | No associated record in PBDB | |||
Synonymy List
| Year | Name and Author |
|---|---|
| 1935 | Geragnostus Howell |
| 1957 | Geragnostus Harrington and Leanza |
| 1964 | Geragnostus Neuman |
| 1968 | Geragnostus Robison and Pantoja-Alor p. 775 |
| 1977 | Neptunagnostella Pek |
| 1997 | Geragnostus Whittington et al. p. 375 |
| 1999 | Geragnostus Hoel |
| 2002 | Geragnostus Sepkoski, Jr. |
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!
