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Homalonotidae β
| Description | Homalonotidae is a family of trilobites that lived from the Ordovician to the Devonian. They are characterised by a shovel-like cephalon (head), and are closely related to the family Calymenidae. From Wikipedia article at https://en.wikipedia.org/wiki/Homalonotidae, 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 : Phacopida : Homalonotidae | |||||||||||||||||||||||||||||||||||||||||||||
| Taxonomic Status (GBIF) | accepted | |||||||||||||||||||||||||||||||||||||||||||||
| Classification (PBDB,GBIF) |
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| Scientific Name | Homalonotidae | |||||||||||||||||||||||||||||||||||||||||||||
| Opinions (PBDB) |
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| Status (PBDB) | extinct | |||||||||||||||||||||||||||||||||||||||||||||
| Taxon Size (PBDB) | 55 | |||||||||||||||||||||||||||||||||||||||||||||
| First Recorded Appearance | 485 - 478 Ma Paleozoic | |||||||||||||||||||||||||||||||||||||||||||||
| Last Recorded Appearance | 383 - 372 Ma Late/Upper Devonian | |||||||||||||||||||||||||||||||||||||||||||||
| Environment | marine (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Motility | fast-moving (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Vision | well-developed | |||||||||||||||||||||||||||||||||||||||||||||
| Diet | carnivore (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Ontogeny | molting,addition of parts (based on Trilobita) | |||||||||||||||||||||||||||||||||||||||||||||
| Ecospace Comments | BODY SIZE: Based on component genera; 3 of 3 genera share 10 to < 100 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 | |||||||||||||||||||||||||||||||||||||||||||||
| Wikipedia | https://en.wikipedia.org/wiki/Homalonotidae |
Fossil Distribution
Subtaxa
| Name | Status | Common Name(s) | Fossil Occurrences | Oldest | Youngest |
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| Colpocoryphinae β subfamily | listed (PBDB) | 123 | 485 Ma Cambrian | 453 Ma Late/Upper Ordovician | |
| Eohomalonotinae β subfamily | listed (PBDB) | 65 | 485 Ma Cambrian | 439 Ma Silurian | |
| Homalonotinae β family | accepted (GBIF) listed (PBDB) | 188 | 485 Ma Cambrian | 383 Ma Late/Upper Devonian | |
| Kerfornellinae β subfamily | listed (PBDB) | 4 | 467 Ma Middle Ordovician | 461 Ma Middle Ordovician | |
| Arduennella β genus | doubtful (GBIF) listed (PBDB) | ||||
| Burmeisterella β genus | doubtful (GBIF) listed (PBDB) | 1 | 409 Ma Early/Lower Devonian | 409 Ma Early/Lower Devonian | |
| Burmeisteria β genus | listed (PBDB) | 55 | 433 Ma Silurian | 393 Ma Early/Lower Devonian | |
| Calymenella β genus | accepted (GBIF) listed (PBDB) | 36 | 485 Ma Cambrian | 439 Ma Silurian | |
| Colpocoryphe β genus | accepted (GBIF) listed (PBDB) | 88 | 485 Ma Cambrian | 458 Ma Middle Ordovician | |
| Digonus β genus | doubtful (GBIF) listed (PBDB) | 11 | 419 Ma Early/Lower Devonian | 411 Ma Early/Lower Devonian | |
| Dipleura β genus | doubtful (GBIF) listed (PBDB) | 62 | 461 Ma Middle Ordovician | 388 Ma Middle Devonian | |
| Eohomalonotus β genus | accepted (GBIF) listed (PBDB) | 29 | 470 Ma Middle Ordovician | 445 Ma Late/Upper Ordovician | |
| Homalonotus β genus | listed (PBDB) | 54 | 466 Ma Middle Ordovician | 388 Ma Middle Devonian | |
| Iberocoryphe β genus | accepted (GBIF) listed (PBDB) | 17 | 470 Ma Middle Ordovician | 453 Ma Late/Upper Ordovician | |
| Kerfornella β genus | accepted (GBIF) listed (PBDB) | 16 | 470 Ma Middle Ordovician | 461 Ma Middle Ordovician | |
| Leiostegina β genus | doubtful (GBIF) listed (PBDB) | 2 | 461 Ma Middle Ordovician | 461 Ma Middle Ordovician | |
| Parahomalonotus β genus | accepted (GBIF) listed (PBDB) | 16 | 419 Ma Early/Lower Devonian | 403 Ma Early/Lower Devonian | |
| Plaesiacomia β genus | accepted (GBIF) listed (PBDB) | 35 | 478 Ma Early/Lower Ordovician | 453 Ma Late/Upper Ordovician | |
| Trimerus β genus | accepted (GBIF) listed (PBDB) | 82 | 443 Ma Silurian | 383 Ma Late/Upper Devonian |
Synonymy List
| Year | Name and Author |
|---|---|
| 1890 | Homalonotidae Chapman |
| 1957 | Homalonotidae Harrington and Leanza |
| 1997 | Homalonotidae Whittington et al. p. 300 |
| 2002 | Homalonotidae Jell and Adrain p. 472 |
| 2011 | Homalonotidae Adrain p. 106 |
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!
Patacamaya, Patacamaya Municipality, Aroma Province, La Paz, Bolivia