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Ischyrotoma ✝
| Source Data |
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| Rank | genus | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomy (GBIF,PBDB) | Life : Animalia : Arthropoda : Trilobita : Proetida : Dimeropygidae : Ischyrotoma | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Ischyrotoma Raymond, 1925 | |||||||||||||||||||||||||||||||||||||||||||||
| Name Published In | Bull. Mus. comp. Zool. Harvard, 67 | |||||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 9 | |||||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 485 - 478 Ma Paleozoic | |||||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 461 - 450 Ma Ordovician | |||||||||||||||||||||||||||||||||||||||||||||
| Environment | marine (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Motility | fast-moving (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Vision | well-developed (based on Dimeropygidae) | |||||||||||||||||||||||||||||||||||||||||||||
| Diet | deposit feeder (based on Proetida) | |||||||||||||||||||||||||||||||||||||||||||||
| 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 |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Ischyrotoma anataphra ✝ species | accepted (GBIF) listed (PBDB) | 17 | 485 Ma Cambrian | 478 Ma Early/Lower Ordovician | |
| Ischyrotoma borealis ✝ species | accepted (GBIF) listed (PBDB) | 1 | 472 Ma Early/Lower Ordovician | 472 Ma Early/Lower Ordovician | |
| Ischyrotoma juabensis ✝ species | accepted (GBIF) listed (PBDB) | 6 | 472 Ma Early/Lower Ordovician | 472 Ma Early/Lower Ordovician | |
| Ischyrotoma parallela ✝ species | accepted (GBIF) listed (PBDB) | 8 | 485 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Ischyrotoma sila ✝ species | accepted (GBIF) listed (PBDB) | 25 | 485 Ma Cambrian | 479 Ma Early/Lower Ordovician | |
| Ischyrotoma stubblefieldi ✝ species | accepted (GBIF) listed (PBDB) | 3 | 479 Ma Early/Lower Ordovician | 472 Ma Early/Lower Ordovician | |
| Ischyrotoma twenhofeli ✝ species | accepted (GBIF) listed (PBDB) | 3 | 472 Ma Early/Lower Ordovician | 466 Ma Middle Ordovician | |
| Ischyrotoma wahwahensis ✝ species | accepted (GBIF) listed (PBDB) | 3 | 472 Ma Early/Lower Ordovician | 472 Ma Early/Lower Ordovician |
Synonymy List
| Year | Name and Author |
|---|---|
| 1925 | Ischyrotoma Raymond |
| 1999 | Ischyrotoma Fortey and Droser p. 191 |
| 2002 | Ischyrotoma Jell and Adrain p. 388 |
| 2002 | Ischyrotoma Sepkoski, Jr. |
| 2013 | Ischyrotoma Fortey and Bruton |
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!
