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Nileidae
Nileidae is a family of trilobites of the Asaphida order. These fast-moving nektonic carnivores lived in the Ordovician and Cambrian periods. Genera *''Aocaspis'' Dolambi and Gond 1992 *''Barrandia'' McCoy 1849 *''Borthaspidella'' Rasetti 1954 *''Bumastides'' Veber 1948 *''Homalopteon'' Salter 1867 *''Illaenopsis'' Salter 1865 *''Kodymaspis'' Prantl and Pribyl 1950 *''Neopsilocephalina'' Yin 1978 *''Nileus'' Dalman 1827 *''Parabarrandia'' Prantl and Pribyl 1949 *''Peraspis'' Whittington 1965 *''Petrbokia'' Pribyl and Vanek 1965 *''Platypeltoides'' Pribyl 1949 *''Poronileus'' Fortey 1975 *''Psilocephalinella'' Kobayashi 1951 *''Symphysurina'' Ulrich 1924 *''Symphysurus'' Goldfuss 1843 *''Varvia'' Thernvik 1965 References Nileidae, Cyclopygoidea Trilobite families Cambrian first appearances Ordovician extinctions {{Asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cyclopygoidea
Cyclopygoidea is a superfamily of trilobites in the order Asaphida, containing the families Cyclopygidae, Nileidae, Symphysurinidae, and Taihungshaniidae. Some subgroups such as the Cyclopygidae are thought to have lived in the water column in the deep sea, where as the unrelated telephinids such as ''Carolinites'' inhabited epipelagic depths around the same time. Some members of the family Nileidae were moved outside of it. The first cyclopygoids were of the family Simphysurinidae such as '' Symphysurina'' in Furongian (late Cambrian) North America North America is a continent in the Northern Hemisphere, Northern and Western Hemisphere, Western hemispheres. North America is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South Ameri .... References Further reading * * * * Nektonic trilobites Trilobite superfamilies Asaphida Furongian first appearances Ordovician trilobites {{Trilobite-stu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Parabarrandia
''Parabarrandia'' is a genus of trilobite of the Asaphida order. These fast-moving nektonic carnivores lived in the Ordovician The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ... period.Sepkoski, Jac Sepkoski's Online Genus Database/ref> Species *''Parabarrandia bohemica'' ( Novák, 1884) References External links Biolib Nileidae Asaphida genera Ordovician trilobites of Europe {{Asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Symphysurus
''Symphysurus'' is a genus of trilobite of the Asaphida order. These fast-moving nektonic carnivores lived in the Ordovician The Ordovician ( ) is a geologic period and System (geology), system, the second of six periods of the Paleozoic Era (geology), Era, and the second of twelve periods of the Phanerozoic Eon (geology), Eon. The Ordovician spans 41.6 million years f ... period References Nileidae Asaphida genera {{Asaphida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Fezouata Formation
The Fezouata Formation or Fezouata Shale is a geological formation in Morocco which dates to the Ordovician, Early Ordovician.Fezouata Formation at Fossilworks.orgFezouata Shale at Fossilworks.orgLower Fezouata Formation at Fossilworks.org [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Asaphida
Asaphida is a large, morphologically diverse order of trilobites found in marine strata dated from the Middle Cambrian until their extinction during the Silurian. Asaphida contains six superfamilies (Anomocaroidea, Asaphoidea, Cyclopygoidea, Dikelocephaloidea, Remopleuridoidea and Trinucleioidea), but no suborders. Asaphids comprise some 20% of described fossil trilobites. In 2020, the superfamily Trinucleioidea was proposed to be raised to an order ( Trinucleida) and removed from Asaphida. Morphology The Asaphids generally have cephalon (head) and pygidium (tail) parts similar in size, and most species have a prominent median ventral suture. Heads are often flat, and carapace furrows in the head area are often faint or not visible. Thoracic segments typically number 5 - 12, though some species have as few as two and some as many as 30. They also generally have a wide doublure, or rim, that surrounds the cephalon. This causes some specimens to be described as having a chara ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cambrian
The Cambrian ( ) is the first geological period of the Paleozoic Era, and the Phanerozoic Eon. The Cambrian lasted 51.95 million years from the end of the preceding Ediacaran period 538.8 Ma (million years ago) to the beginning of the Ordovician Period 486.85 Ma. Most of the continents lay in the southern hemisphere surrounded by the vast Panthalassa Ocean. The assembly of Gondwana during the Ediacaran and early Cambrian led to the development of new convergent plate boundaries and continental-margin arc magmatism along its margins that helped drive up global temperatures. Laurentia lay across the equator, separated from Gondwana by the opening Iapetus Ocean. The Cambrian marked a profound change in life on Earth; prior to the Period, the majority of living organisms were small, unicellular and poorly preserved. Complex, multicellular organisms gradually became more common during the Ediacaran, but it was not until the Cambrian that fossil diversity seems to rapidly ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Trilobite Families
Trilobites (; meaning "three-lobed entities") are extinction, extinct marine arthropods that form the class (biology), class Trilobita. One of the earliest groups of arthropods to appear in the fossil record, trilobites were among the most successful of all early animals, existing in oceans for almost 270million years, with over 22,000 species having been described. Because trilobites had wide diversity and an easily fossilized mineralised exoskeleton made of calcite, they left an extensive fossil record. The study of their fossils has facilitated important contributions to biostratigraphy, paleontology, evolution, evolutionary biology, and plate tectonics. Trilobites are placed within the clade Artiopoda, which includes many organisms that are morphologically similar to trilobites, but are largely unmineralised. The relationship of Artiopoda to other arthropods is uncertain. Trilobites evolved into many ecological niches; some moved over the seabed as predators, scavengers, or ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
