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Zeteagnostus ✝
| Description | Ptychagnostus is an extinct genus of blind trilobite that lived during the Cambrian period, part of the order Agnostida. Ptychagnostidae generally do not exceed ten millimetres in length. Their remains are sometimes found in the otherwise empty tubes of the polychaete worm Selkirkia. It probably lived in the water column. Its major characteristics are lack of eyes, two lobes on the glabella, and three lobes on the pygidium. From Wikipedia article at https://en.wikipedia.org/wiki/Zeteagnostus, 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 : Ptychagnostidae : Zeteagnostus | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Zeteagnostus Öpik, 1979 | |||||||||||||||||||||||||||||||||||||||||||||
| Name Published In | Bulletin Bur. Miner. Resour. Geol. Geophys. Aust. No. 172 | |||||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 2 | |||||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 505 - 501 Ma Cambrian | |||||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 505 - 501 Ma Cambrian | |||||||||||||||||||||||||||||||||||||||||||||
| Environment | marine (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Motility | slow-moving (based on Agnostida) | |||||||||||||||||||||||||||||||||||||||||||||
| Vision | blind (based on Ptychagnostidae) | |||||||||||||||||||||||||||||||||||||||||||||
| Diet | detritivore (based on Agnostida) | |||||||||||||||||||||||||||||||||||||||||||||
| Ontogeny | molting,addition of parts (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | low Mg calcite, chitin (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| 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/Zeteagnostus |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Zeteagnostus incautus ✝ species | accepted (GBIF) listed (PBDB) | 3 | 505 Ma Cambrian | 505 Ma Cambrian |
Synonymy List
| Year | Name and Author |
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| 1979 | Zeteagnostus Opik |
| 2002 | Zeteagnostus Sepkoski, Jr. |
| 2008 | Zeteagnostus Ergaliev and Ergaliev |
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!
