| Perryus | |
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| Perryus severnensis from the Attawapiskat Formation of Ontario; cranidium; holotype of the type species | |
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| Genus: | Perryus Gass & Mikulic 1982 |
Perryus is a genus of phacopid trilobites that lived in what are now Canada, Greenland, and Siberia from the early Silurian to the middle Silurian from 438 to 430 mya, existing for approximately 8 million years. [1]
Perryus was named by Gass & Mikulic in 1982. [2] Jell and Adrain list it as a currently valid genus name within the Phacopida, specifically within the Encrinuridae. [3]
Perryus bartletti Edgecombe & Chatterton, 1992; Perryus globosus (Maksimova, 1962); Perryus mikulici Hughes & Thomas, 2014; Perryus severnensis Gass & Mikulic, 1982 (type species); Perryus palasso (Lane, 1988)
Encrinurus is a long-lived genus of phacopid trilobites that lived in what are now Africa, Asia, Australia, Europe, North America, and South America from the middle Ordovician to the early Devonian from 472 to 412.3 mya, existing for approximately 59.7 million years.
Avalanchurus is an extinct genus of trilobites from the Silurian period. It was originally described in 1993 as a subgenus of Struszia, and then promoted in 1997 to genus status.
Boeckops is a genus of trilobites in the order Phacopida, which existed in what is now the Czech Republic. It was described by Chlupac in 1972, and the type species is Boeckops boecki, which was originally described as Phacops boecki by Hawle and Corda in 1847. Boeckops is also been discriped from the lower Devonian of Morocco and Algeria. The Genus Boeckops is interpreted as intermediate from between the traditional genus concept of Phacops and Reedops. The Genus Boeckops is regarded as problematic or difficult by McKellar et Chatterton 2009.
Contracheirurus is a trilobite in the order Phacopida that existed during the lower Silurian of what is now the Northwest Territories of Canada. It was described by Hatterton and Perry in 1984, and the type species is Contracheirurus zuvegesi.
Cromus is a genus of phacopid trilobites in the family Encrinuridae, that existed during the upper Silurian in what is now the Czech Republic. The genus was described by Barrande in 1852, and the type species is C. intercostatus. It also contains the species C. canorus.
Curriella is a genus of trilobites in the order Phacopida, that existed during the lower Silurian in what is now Scotland. It was described by Lamont in 1978, and the type species is Curriella newlandensis; the species epithet was derived from the type location, the Newlands Formation. It also contains the species C. clancyi.
Dalmaniturus is a genus of trilobites in the order Phacopida, that existed during the lower Silurian in what is now western Mongolia. It was described by Chernysheva in 1937, and the type species is Dalmaniturus weberi.
Daytonia is a trilobite in the order Phacopida, that existed during the lower Silurian in what is now the United States. It was described by D. J. Holloway in 1981, and the type species is Daytonia werthneri, which was originally described under the genus Dalmanites by August Foerste in 1885. It also contains the species, Daytonia mekon. The type locality for the genus was the Brassfield Formation, in Ohio.
Delops is a trilobite in the order Phacopida, that existed during the upper Silurian in what is now England. It was described by Rickards in 1964, and the type species is Delops obtusicaudatus, which was originally described under the genus Phacops by Salter in 1849. The type locality was the Middle Coldwell Beds.
Denckmannites is a trilobite in the order Phacopida, that existed during the upper Silurian in what is now the Czech Republic. It was described by Wedekind in 1914, and the type species is Denckmannites volborthi, which was originally described under the genus Phacops by Barrande in 1852. It also contains the species Denckmannites morator, and Denckmannites primaevus. The type locality was the Kopanina Formation.
Distyrax is a genus of trilobites in the order Phacopida, that existed during the lower Silurian in what is now Greenland. It was described by Philip D. Lane in 1988, and the type species is Distyrax peeli. It also contains the species, Distyrax cooperi. The type locality was the Odins Fjord Formation.
Fragiscutum is a genus of trilobites in the order Phacopida, that existed during the Silurian in what is now the United States. It was described by Whittington and Campbell in 1967, and the type species is Fragiscutum rhytium. The type locality was the Hardwood Mountain Formation in Maine.
Frammia is a genus of trilobites in the order Phacopida that existed during the middle and upper Silurian in what is now the Arctic regions of Canada and Russia. It was described by Holtedahl in 1914, and the type species is Frammia dissimilis. That species was subsequently considered to be a synonym of Frammia arctica. The genus also contains the species, F. bachae Adrain & Edgecombe, 1997, F. hyperborea, and F. rossica. The type locality is the Douro Formation of Cornwallis Island in Nunavut, Canadian Arctic.
Kailia is a genus of trilobites in the order Phacopida that existed during the lower Silurian in what is now China. It was described by W. Zhang in 1974, and the type species is Kailia quadrisulcata. The type locality was the Xiushan Formation in Sichuan.
Struszia is a genus of fossil trilobites from the Silurian period, erected in 1993 and named after paleontologist Desmond L. Strusz.
Arcticalymene is a genus of trilobites found in Silurian-aged marine strata of Arctic Canada and Central Victoria, Australia. The Canadian species are named after each of the Sex Pistols: A. cooki, A. jonesi, A. matlocki, A. rotteni and A. viciousi, all named by Adrain and Edgecombe in 1997.
Bumastus is an extinct genus of corynexochid trilobites which existed from the Early Ordovician period to the Late Silurian period. They were relatively large trilobites, reaching a length of 6 in (15 cm). They were distinctive for their highly globular, smooth-surfaced exoskeleton. They possessed well-developed, large compound eyes and were believed to have dwelled in shallow-water sediments in life.
Paleontology in Wisconsin refers to paleontological research occurring within or conducted by people from the U.S. state of Wisconsin. The state has fossils from the Precambrian, much of the Paleozoic, and the later part of the Cenozoic. Most of the Paleozoic rocks are marine in origin. Because of the thick blanket of Pleistocene glacial sediment that covers the rock strata in most of the state, Wisconsin’s fossil record is relatively sparse. In spite of this, certain Wisconsin paleontological occurrences provide exceptional insights concerning the history and diversity of life on Earth.
Mackenziurus is a genus of phacopid trilobites from the Silurian containing several species, including four named after members of the American punk band the Ramones.
Aponileus is an extinct genus of trilobites. Chung-Hung Hu circumscribed the genus in 1963. The genus was once considered a junior subjective synonym of the genus Psephosthenaspis but it is considered to be a distinct genus again. As of 2021, fossils have been found in Greenland, Texas, and Utah. They all date to the Upper Floian (Blackhillsian) within the Ordovician Period.
