Nileidae

	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 ''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]
	Parabarrandia ''Parabarrandia'' is a genus of trilobite of the Asaphida order. These fast-moving nektonic carnivores lived in the Ordovician 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]
	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 ''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]
picture info	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 Trinucleoidea 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 char ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Trilobite Families Trilobites (; meaning "three lobes") 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 252 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. By the time trilobites first appeared in the fossil record, they were already highly diversified and geographically dispersed. Because trilobites had wide diversity and an easily fossilized exoskeleton, they left an extensive fossil record. The stud ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]