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Heliomeroides
''Heliomeroides'' is a trilobite in the order Phacopida (family Cheiruridae), that existed during the upper Ordovician in what is now the United States. It was described by Evitt in 1951, and the type species is ''Heliomeroides teres''. The Type locality (biology), type locality was the Lincolnshire Formation in Virginia. P.A. Jell and J.M. Adrain. Species * ''Heliomeroides alacer'' Whittington, 1963 * ''Heliomeroides evitti'' Baldis & Pothe, 1995 * ''Heliomeroides freschaufae'' Chatterton, 1980 * ''Heliomeroides raymondi'' (Bradley, 1930) - Originally assigned to ''Heliomera'', and later moved to its current genus by Evitt in 1951. * ''Heliomeroides teres'' Evitt, 1951 - Type ...[...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Cheiruridae
Cheiruridae is a family of phacopid trilobites of the suborder Cheirurina. Its members, as with other members of the suborder, had distinctive pygidia modified into finger-like spines. They first appeared in the uppermost Cambrian (upper Furongian), and persisted until the end of the Middle Devonian (Givetian). Currently about 657 species assigned to 99 genera are included. Distribution The subfamily Cheirurinae with 269 species in 38 genera occur from the Floian to the Givetian and are probably monophyletic. The 109 species in 15 genera of the Acanthoparyphinae are also probably monophyletic, and are known from the Floian to the Ludfordian. The Cyrtometopinae were present between the Floian and the Upper Katian, enveloping 22 species in 5 genera, of which the monophyly is unclear. The Deiphoninae are probably monophyletic, occur from the Dapingian to the Gorstian, having 71 species assigned to 6 genera. The possibly paraphyletic Eccoptochilinae with 67 species in 13 genera ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |