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Triarthrus ✝
Description | Triarthrus is a genus of Upper Ordovician ptychopariid trilobite found in New York, Ohio, Kentucky, and Indiana, eastern and northern Canada, China and Scandinavia. It is the last of the Olenid trilobites, a group which flourished in the Cambrian period. The specimens of T. eatoni that are found in the Beecher's Trilobite Bed, Rome, New York area are exquisitely preserved showing soft body parts in iron pyrite. Pyrite preservation has given scientists a rare opportunity to examine the gills, walking legs, antennae and digestive systems of trilobites, which are rarely preserved. Triarthrus is therefore commonly used in science texts to illustrate trilobite anatomy and physiology. From Wikipedia article at https://en.wikipedia.org/wiki/Triarthrus, 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 : Arthropoda : Trilobita : Ptychopariida : Olenidae : Triarthrus | ||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomy (PBDB) | Life : Animalia : Arthropoda : Trilobita : Olenida : Olenidae : Triarthrus | ||||||||||||||||||||||||||||||||||||||||||||||||
Taxonomic Status (GBIF) | accepted | ||||||||||||||||||||||||||||||||||||||||||||||||
Classification (PBDB,GBIF) |
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Scientific Name | Triarthrus Green, 1832 | ||||||||||||||||||||||||||||||||||||||||||||||||
Name Published In | Monthly Amer. J. Geol., 1 | ||||||||||||||||||||||||||||||||||||||||||||||||
Opinions (PBDB) |
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Status (PBDB) | extinct | ||||||||||||||||||||||||||||||||||||||||||||||||
Taxon Size (PBDB) | 18 | ||||||||||||||||||||||||||||||||||||||||||||||||
First Recorded Appearance | 485 - 485 Ma Paleozoic | ||||||||||||||||||||||||||||||||||||||||||||||||
Last Recorded Appearance | 450 - 444 Ma Paleozoic | ||||||||||||||||||||||||||||||||||||||||||||||||
Environment | marine (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||||||||
Motility | fast-moving (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||||||||
Vision | well-developed (based on Olenidae) | ||||||||||||||||||||||||||||||||||||||||||||||||
Diet | carnivore (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||||||||
Ontogeny | molting,addition of parts (based on Trilobita) | ||||||||||||||||||||||||||||||||||||||||||||||||
Ecospace Comments | BODY SIZE: Data from Harrington et al. (1959). | ||||||||||||||||||||||||||||||||||||||||||||||||
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/Triarthrus |
Fossil Distribution
Subtaxa
Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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Triarthrus becki ✝ species | accepted (GBIF) listed (PBDB) | 4 | 461 Ma Middle Ordovician | 461 Ma Middle Ordovician | |
Triarthrus beckii ✝ species | listed (PBDB) | ||||
Triarthrus billingsi ✝ species | accepted (GBIF) listed (PBDB) | ||||
Triarthrus canadensis ✝ species | accepted (GBIF) listed (PBDB) | 4 | 461 Ma Middle Ordovician | 461 Ma Middle Ordovician | |
Triarthrus eatoni ✝ species | accepted (GBIF) listed (PBDB) | 19 | 461 Ma Middle Ordovician | 452 Ma Late/Upper Ordovician | |
Triarthrus glaber ✝ species | accepted (GBIF) listed (PBDB) | 2 | 461 Ma Middle Ordovician | 452 Ma Late/Upper Ordovician | |
Triarthrus huguesensis ✝ species | accepted (GBIF) listed (PBDB) | 4 | 461 Ma Middle Ordovician | 450 Ma Late/Upper Ordovician | |
Triarthrus humilis ✝ species | accepted (GBIF) listed (PBDB) | 4 | 466 Ma Middle Ordovician | 450 Ma Late/Upper Ordovician | |
Triarthrus linnarssoni ✝ species | accepted (GBIF) listed (PBDB) | 1 | 452 Ma Late/Upper Ordovician | 452 Ma Late/Upper Ordovician | |
Triarthrus parchaensis ✝ species | accepted (GBIF) listed (PBDB) | 25 | 479 Ma Early/Lower Ordovician | 479 Ma Early/Lower Ordovician | |
Triarthrus rectifrons ✝ species | accepted (GBIF) listed (PBDB) | 8 | 485 Ma Cambrian | 485 Ma Cambrian | |
Triarthrus rougensis ✝ species | accepted (GBIF) listed (PBDB) | 1 | 452 Ma Late/Upper Ordovician | 452 Ma Late/Upper Ordovician | |
Triarthrus shinetonensis ✝ species | accepted (GBIF) listed (PBDB) | 4 | 485 Ma Cambrian | 485 Ma Cambrian | |
Triarthrus sichuansis ✝ species | accepted (GBIF) listed (PBDB) | ||||
Triarthrus skutensis ✝ species | accepted (GBIF) listed (PBDB) | 1 | 456 Ma Late/Upper Ordovician | 456 Ma Late/Upper Ordovician | |
Triarthrus spinosus ✝ species | accepted (GBIF) listed (PBDB) | 5 | 461 Ma Middle Ordovician | 452 Ma Late/Upper Ordovician | |
Triarthrus turkestanicus ✝ species | accepted (GBIF) listed (PBDB) | ||||
Triarthrus variscorum species | accepted (GBIF) | No associated record in PBDB |
Synonymy List
Year | Name and Author |
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1832 | Triarthrus Green |
1957 | Triarthrus Harrington and Leanza |
1959 | Triarthrus Poulsen |
1965 | Triarthrus Nikolaisen |
1968 | Triarthrus Robison and Pantoja-Alor p. 790 |
1981 | Triarthrus Owen |
2002 | Triarthrus Jell and Adrain p. 455 |
2002 | Triarthrus 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!
Montréal, Québec, Canada