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| Genus: | Meroperix |
Meroperix is a genus of styginid trilobite in the order Corynexochida that lived during the Silurian period. [1] [2]
| Meroperix Temporal range: | |
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| Meroperix | |
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| Genus: | Meroperix |
Meroperix is a genus of styginid trilobite in the order Corynexochida that lived during the Silurian period. [1] [2]
Agnostida are an order of extinct arthropods which have classically been seen as a group of highly modified trilobites, though some recent research has doubted this placement. Regardless, they appear to be close relatives as part of the Artiopoda. They are present in the Lower Cambrian fossil record along with trilobites from the Redlichiida, Corynexochida, and Ptychopariida orders, and were highly diverse throughout the Cambrian. Agnostidan diversity severely declined during the Cambrian-Ordovician transition, and the last agnostidans went extinct in the Late Ordovician.
Trilobites are extinct marine arthropods that form the class Trilobita. Trilobites form one of the earliest known groups of arthropods. The first appearance of trilobites in the fossil record defines the base of the Atdabanian stage of the Early Cambrian period and they flourished throughout the lower Paleozoic before slipping into a long decline, when, during the Devonian, all trilobite orders except the Proetida died out. The last extant trilobites finally disappeared in the mass extinction at the end of the Permian about 251.9 million years ago. Trilobites were among the most successful of all early animals, existing in oceans for almost 270 million years, with over 22,000 species having been described.
Redlichiida is an order of trilobites, a group of extinct marine arthropods. Species assigned to the order Redlichiida are among the first trilobites to appear in the fossil record, about halfway during the Lower Cambrian. Due to the difficulty to relate sediments in different areas, there remains some discussion, but among the earliest are Fallotaspis, and Lemdadella, both belonging to this order. The first representatives of the orders Corynexochida and Ptychopariida also appear very early on and may prove to be even earlier than any redlichiid species. In terms of anatomical comparison, the earliest redlichiid species are probably ancestral to all other trilobite orders and share many primitive characters. The last redlichiid trilobites died out before the end of the Middle Cambrian.
Corynexochida is an order of trilobite that lived from the Lower Cambrian to the Late Devonian. Like many of the other trilobite orders, Corynexochida contains many species with widespread characteristics.
Corynexochina is a poorly understood subdivision of the trilobite order Corynexochida.
Dolichometopidae is a family of corynexochid trilobites that lived in the Cambrian, from the lower Botomian to the Dresbachian. It contains the following genera:
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.
Planiscutellum is a genus of trilobites in the order Corynexochida family Styginidae. These trilobites were nektobenthic detritivore. They lived in the Silurian period in the upper Ludlow epoch, from 422.9 ± 1.5 to 418.7 ± 2.8 million years ago.
Bojoscutellum is a genus of trilobites in the order Corynexochida family Styginidae.
Styginidae is a family of trilobite in the order Corynexochida. Fossils of the various genera are found in marine strata throughout the world, aged from Ordovician up until the family's extinction during the Silurian.
Ectillaenus is a genus of trilobites in the order Corynexochida.
Panderia is a genus of trilobites in the order Corynexochida.
Panderiidae is a family of trilobites in the order Corynexochida.
Dorypygidae is a family of trilobite belonging to the order Corynexochida.
The Illaeninae are a suborder of trilobites in the order Corynexochida.
Edelsteinaspididae is an extinct family of trilobite in the order Corynexochida. There are about seven genera in Edelsteinaspididae.
Jakutidae is an extinct family of trilobite in the order Corynexochida. There are at least four genera and about seven described species in Jakutidae.
Corynexochidae Angelin, 1854, is an extinct family of trilobites within the order Corynexochida Kobayashi, 1935. According to Jell and Adrain (2002) there are at least 15 genera within the Family Corynexochidae:
Oryctocephalidae is an extinct family of trilobite in the order Corynexochida. There are more than 20 genera and 60 described species in Oryctocephalidae.
Hanburia may refer to:
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