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Ptychagnostidae ✝
| Description | Ptychagnostidae is a family of agnostid trilobites from the 5th Stage to the Paibian Age of the Cambrian (509 to 497 million years ago). The family includes several important index fossils. From Wikipedia article at https://en.wikipedia.org/wiki/Ptychagnostidae, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | ||||||||||||||||||||||||||||||||||||||||||
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| Source Data |
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| Rank | family | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (GBIF,PBDB) | Life : Animalia : Arthropoda : Trilobita : Agnostida : Ptychagnostidae | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Ptychagnostidae | ||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | ||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 62 | ||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 513 - 505 Ma Cambrian | ||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 479 - 466 Ma Ordovician | ||||||||||||||||||||||||||||||||||||||||||
| Environment | marine (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Motility | slow-moving (based on Agnostida) | ||||||||||||||||||||||||||||||||||||||||||
| Vision | blind | ||||||||||||||||||||||||||||||||||||||||||
| Diet | detritivore (based on Agnostida) | ||||||||||||||||||||||||||||||||||||||||||
| Ontogeny | molting,addition of parts (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Ecospace Comments | BODY SIZE: Based on component genera; 3 of 3 genera share 10 to < 100 length, 3 of 3 share 10 to < 100 width. | ||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | low Mg calcite, chitin (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Primary Reference (PBDB) | S. R. Westrop, R. Ludvigsen, and C. H. Kindle. 1996. Marjuman (Cambrian) agnostoid trilobites of the Cow Head Group, western Newfoundland. Journal of Paleontology 70(5):804-829 | ||||||||||||||||||||||||||||||||||||||||||
| Wikipedia | https://en.wikipedia.org/wiki/Ptychagnostidae |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Acidusus ✝ genus | doubtful (GBIF) listed (PBDB) | ||||
| Goniagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 76 | 513 Ma Cambrian | 501 Ma Cambrian | |
| Lejopyge ✝ genus | accepted (GBIF) listed (PBDB) | 138 | 513 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Myrmecomimus ✝ genus | accepted (GBIF) listed (PBDB) | 3 | 505 Ma Cambrian | 505 Ma Cambrian | |
| Onymagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 18 | 513 Ma Cambrian | 504 Ma Cambrian | |
| Pentagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 41 | 513 Ma Cambrian | 505 Ma Cambrian | |
| Ptychagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 215 | 513 Ma Cambrian | 501 Ma Cambrian | |
| Tomagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 11 | 513 Ma Cambrian | 513 Ma Cambrian | |
| Triplagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 29 | 513 Ma Cambrian | 505 Ma Cambrian | |
| Yakutiana ✝ genus | accepted (GBIF) listed (PBDB) | 51 | 513 Ma Cambrian | 505 Ma Cambrian | |
| Zeteagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 3 | 505 Ma Cambrian | 505 Ma Cambrian |
Synonymy List
| Year | Name and Author |
|---|---|
| 1939 | Ptychagnostidae Kobayashi |
| 1996 | Ptychagnostidae Westrop et al. pp. 812, 816 |
| 1997 | Ptychagnostidae Whittington et al. p. 350 |
| 2003 | Ptychagnostidae Hong et al. |
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!
