BETA TEST - Fossil data and pages are very much experimental and under development. Please report any problems
Arthrorhachis ✝
| Description | Trinodus is a very small to small (about 1 centimetre or 0.39 inches) blind trilobite, a well known group of extinct marine arthropods, which lived during the Ordovician (Tremadocian to early Hirnantian), in what are now the Yukon Territories, Virginia, Italy, Czech Republic, Poland, Denmark, Sweden, Svalbard, Ireland, Scotland, Wales, Iran, Kazakhstan and China. It is one of the last of the Agnostida order to survive. From Wikipedia article at https://en.wikipedia.org/wiki/Arthrorhachis, which is released under the Creative Commons Attribution-Share-Alike License 3.0. | |||||||||||||||||||||||||||||||||||||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| Source Data |
| |||||||||||||||||||||||||||||||||||||||||||||
| Rank | genus | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (GBIF,PBDB) | Life : Animalia : Arthropoda : Trilobita : Agnostida : Metagnostidae : Arthrorhachis | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
| |||||||||||||||||||||||||||||||||||||||||||||
| Scientific Name | Arthrorhachis Hawle & Corda, 1847 | |||||||||||||||||||||||||||||||||||||||||||||
| Name Published In | Prod. Mon. Böhm. Trilob. | |||||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
| |||||||||||||||||||||||||||||||||||||||||||||
| Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 7 | |||||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 488 - 485 Ma Paleozoic | |||||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 445 - 443 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 | 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/Arthrorhachis |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
|---|---|---|---|---|---|
| Arthrorhachis danica ✝ species | accepted (GBIF) listed (PBDB) | 2 | 488 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Arthrorhachis elliptifrons ✝ species | accepted (GBIF) listed (PBDB) | 3 | 485 Ma Cambrian | 485 Ma Cambrian | |
| Arthrorhachis mobergi species | accepted (GBIF) | No associated record in PBDB | |||
| Arthrorhachis tarda ✝ species | listed (PBDB) | 35 | 458 Ma Middle Ordovician | 450 Ma Late/Upper Ordovician | |
| Arthrorhachis tardus ✝ species | listed (PBDB) | ||||
Synonymy List
| Year | Name and Author |
|---|---|
| 1847 | Arthrorhachis Hawle and Corda |
| 1939 | Girvanagnostus Kobayashi |
| 1981 | Arthrorhachis Owen |
| 1989 | Arthrorhachis Ahlberg |
| 1997 | Arthrorhachis Whittington et al. p. 373 |
| 1999 | Arthrorhachis Hoel |
| 2002 | Arthrorhachis 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!
