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Adrianitinae
Adrianitinae is a subfamily of the Adrianitidae which is part of the goniatitid superfamily Adrianitaceae. The Adrianitinae which comprise the more advanced genera in the Adrianitidae have sutures that form 14 to 30 lobes. Shells may be discoidal or globular or in between. Taxonomy The Adriantinae which are found widespread in lower and middle Permian marine sediments are derived from '' Crimites'', a genus in the more primitive Emilitinae subfamily, through '' Neocrimites'' which gave rise to ''Adrianites'', ''Epadrianites'', '' Pseudagathiceras'', and '' Sosiocrimites'' (Saunders et al. 1999). In the older taxonomy of Miller et al.,(1960), the Adrianitinae consists of ''Adrianites'', ''Hoffmannia'', '' Doryceras'', ''Crimites'', and '' Texoceras''. ''Hoffmannia'' and ''Texoceras'' are each now their own subfamily, Hoffmanniinae and Texoceratinae respectively. ''Doryceras'' and ''Crimites'' are removed from the Adrianitinae and placed in the Emilitinae (sometimes given as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Adrianitidae
Adrianitidae is a family in the Adrianitaceae, a superfamily of ammonites in the cephalopod order, Goniatitida, known from the Middle Pennsylvanian to the Middle Permian. Members of the Adrianitidae, named by Schindewolf in 1931, and of the Adrianitaceae, have shells (conchs) that are discoidal to globular with umbilici that vary in form, and sutures with 10 to 30, more or less equal, lobes. The Adrianitinae which come from the Lower and Middle Permian have sutures that form 14 to 30 lobes. Genera included ''Adrianites'', ''Hoffmannia'', ''Doryceras'', ''Crimites'', and ''Texoceras''. The Dumbaritinae which come from the Middle and Upper Pennsylvanian (U Carb) have sutures with only 10 lobes. ''Clinolobus'', from the Middle Permian of Sicily, has about 14 lobes with the course of the external suture forming a V. Classification The Adriantidae contains three subfamilies, the Adrianitinae, Hoffmanniinae, and Texoceratinae. Most of the genera in the family, some 15 in number, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hoffmanniinae
Hoffmanniinae is an adrianitid ammonoid cephalopod subfamily In biological classification, a subfamily (Latin: ', plural ') is an auxiliary (intermediate) taxonomic rank, next below family but more inclusive than genus. Standard nomenclature rules end subfamily botanical names with "-oideae", and zoologi ... established for the Middle Permian genus ''Hoffmannia''. ''Hoffmannia'', named by Gemmellaro in 1887, is a discoidal adrianitid with a large umbilicus, prominent growth lines, and sutures with about 20 lobes. Note that the genus ''Hoffmannia'' is included in the Adrianitinae in the older Treatise on Invertebrate Paleontology volume on Ammonoidea and that it has been reassigned to the Hoffmanniinae, named by Spath in 1934, revived in the new Treatise volume on Carboniferous and Permian Ammonoidea. References External links * Adrianitidae Fossil taxa described in 1934 {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Emilitidae
Emilitinae is a subfamily based on the genus '' Emilites'', proposed by Leonova and Bogoslovskaya, 1990, for the most primitive members of the Adrianitidae, but no longer generally recognized as an independent taxon. ''Emilites'' and the other genera listed in the Emilitinae have been reassigned to the Adrianitinae where they were previously found. These are part of an extinct group of shelled cephalopods known as ammonoids, which are more closely related to squids, belemnites, octopuses, and cuttlefish Cuttlefish or cuttles are marine molluscs of the order Sepiida. They belong to the class Cephalopoda which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone, which is used for control of ... than to the nautiloids from which they are derived. References * Emilitinae i GONIAT online12/03/10 Paleodb Emilitidae12/03/10 The Paleobiology Databaseaccessed on 10/01/07 Adrianitidae {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Genera
Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial nomenclature, the genus name forms the first part of the binomial species name for each species within the genus. :E.g. ''Panthera leo'' (lion) and ''Panthera onca'' (jaguar) are two species within the genus '' Panthera''. ''Panthera'' is a genus within the family Felidae. The composition of a genus is determined by taxonomists. The standards for genus classification are not strictly codified, so different authorities often produce different classifications for genera. There are some general practices used, however, including the idea that a newly defined genus should fulfill these three criteria to be descriptively useful: # monophyly – all descendants of an ancestral taxon are grouped together (i.e. phylogenetic analysis should clearly demons ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Aricoceras
''Aricoceras'' is an extinct genus of the Adrianitidae family. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish Cuttlefish or cuttles are marine molluscs of the order Sepiida. They belong to the class Cephalopoda which also includes squid, octopuses, and nautiluses. Cuttlefish have a unique internal shell, the cuttlebone, which is used for control of ..., and more distantly to the nautiloids. References The Paleobiology Databaseaccessed on 10/01/07 Adrianitidae Goniatitida genera Permian ammonites Prehistoric animals of Asia Paleozoic life of British Columbia {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
