List Of Graptolite Genera
This list of graptolites is an attempt to create a comprehensive listing of all genera from the fossil record that have ever been considered to be members of Graptolithina, excluding purely vernacular terms. The list includes all commonly accepted genera, but also genera that are now considered invalid, doubtful (''nomina dubia''), or were not formally published (''nomina nuda''), as well as junior synonyms of more established names, and genera that are no longer considered graptolites. The list below is based on the genera listed in Maletz (2014). Naming conventions and terminology Naming conventions and terminology follow the International Code of Zoological Nomenclature. Technical terms used include: * Junior synonym: A name which describes the same taxon as a previously published name. If two or more genera are formally designated and the type specimens are later assigned to the same genus, the first to be published (in chronological order) is the senior synonym, and all othe ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]  

Didymograptus Murchisoni Lg
''Didymograptus'' is an extinct genus of graptolites with four rows of cups. They lived during the Middle Ordovician, to Late Ordovician.''Didymograptus''
at

Fossilworks

.org

Distribution

Fossils of ''Didymograptus'' have been found in Argentina, Australia, Bolivia, Canada (Northwest Territories, Quebec, Yukon, Newfoundland and Labrador), Chile, China, Colombia (

Rhabdopleuridae
Rhabdopleurida is one of three orders in the class Pterobranchia, which are small, worm-shaped animals, are the only surviving graptolites. Members belong to the hemichordates. Species in this order are sessile, colonial, connected with a stolon, living in clear water and secrete tubes called tubarium. They have a single gonad, the gill slits are absent and the collar has two tentaculated arms. ''Rhabdopleura'' is the best studied pterobranch in developmental biology. ''Rhabdopleura'' is the only extant graptolite. Taxonomy This small order is monotypic. It has only a single extant genus, containing four to six living species. Order Rhabdopleurida Fowler 1892 * Family Rhabdopleuridae Harmer 1905 ** Genus ''Rhabdopleura'' Allman 1869 *** ''Rhabdopleura annulata'' Norman 1921 — Indo-Pacific region *** '' Rhabdopleura compacta'' Hincks 1880 — Atlantic *** ''Rhabdopleura normani'' Allmann, 1869 — Atlantic and parts of the Pacific *** ''Rhabdopleura recondita'' Beli, Cameron ...
[...More Info...]       [...Related Items...]     OR:     [Wikipedia]   [Google]   [Baidu]