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Metagnostidae ✝
| Source Data |
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| Rank | family | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (GBIF,PBDB) | Life : Animalia : Arthropoda : Trilobita : Agnostida : Metagnostidae | ||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Metagnostidae | ||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | ||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 48 | ||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 501 - 485 Ma Cambrian | ||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 445 - 443 Ma Paleozoic | ||||||||||||||||||||||||||||||||||||||||||
| 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; 2 of 2 genera share 1 to < 10 width, inconsistent length. | ||||||||||||||||||||||||||||||||||||||||||
| Taphonomy | low Mg calcite, chitin (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||
| Primary Reference (PBDB) | P. A. Jell and J. M. Adrain. 2002. Available generic names for trilobites. Memoirs of the Queensland Museum 48(2):331-553 |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
|---|---|---|---|---|---|
| Anglagnostus ✝ genus | doubtful (GBIF) listed (PBDB) | 6 | 485 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Arthrorhachis ✝ genus | accepted (GBIF) listed (PBDB) | 68 | 488 Ma Cambrian | 445 Ma Late/Upper Ordovician | |
| Corrugatagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 34 | 501 Ma Cambrian | 450 Ma Late/Upper Ordovician | |
| Dividuagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 4 | 467 Ma Middle Ordovician | 458 Ma Middle Ordovician | |
| Galbagnostus ✝ genus | accepted (GBIF) listed (PBDB) | 14 | 479 Ma Early/Lower Ordovician | 466 Ma Middle Ordovician | |
| Geragnostella ✝ genus | doubtful (GBIF) listed (PBDB) | 10 | 485 Ma Cambrian | 456 Ma Late/Upper Ordovician | |
| Geragnostus ✝ genus | accepted (GBIF) listed (PBDB) | 239 | 501 Ma Cambrian | 450 Ma Late/Upper Ordovician | |
| Homagnostoides ✝ genus | doubtful (GBIF) listed (PBDB) | 1 | 478 Ma Early/Lower Ordovician | 478 Ma Early/Lower Ordovician | |
| Quadragnostus ✝ genus | doubtful (GBIF) listed (PBDB) | 1 | 501 Ma Cambrian | 501 Ma Cambrian | |
| Trinodus ✝ genus | accepted (GBIF) listed (PBDB) | 121 | 485 Ma Cambrian | 450 Ma Late/Upper Ordovician |
Obsolete Names
| Name | Source | Taxon Rank | Taxonomy |
|---|---|---|---|
| Trinodidae | GBIF | family | Animalia : Arthropoda : Trilobita : Agnostida : Trinodidae |
| Arthrorhachidae | GBIF | family | Animalia : Arthropoda : Trilobita : Agnostida : Arthrorhachidae |
Synonymy List
| Year | Name and Author |
|---|---|
| 1909 | Metagnostidae Jaekel |
| 1913 | Arthrorhachidae Raymond |
| 1935 | Geragnostidae Howell |
| 1935 | Trinodidae Howell |
| 1957 | Geragnostinae Harrington and Leanza |
| 1968 | Geragnostidae Robison and Pantoja-Alor p. 775 |
| 1997 | Metagnostidae Whittington et al. p. 373 |
| 2002 | Metagnostidae Jell and Adrain p. 474 |
| 2009 | Metagnostidae Owens and Fortey |
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!
