Quinnites

	Quinnites ''Quinnites'' is a genus of goniatitid ammonites included in the gastrioceratoidean family Reticuloceratidae known from the Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ... of the state of Arkansas, USA. Description ''Quinnites ''can be recognized by its thickly discoidal shell with a wide umbilicus and double pronged ventral lobe with a median saddle about half as high as the entire lobe. Umbilical ribs are common. May have spiral ornamentation, constrictions, or ventral groove. Taxonomy ''Quinnites'', named by Manger and Saunders 1980, contains two species, ''Quinnites henbesti'' and ''Quinnites textum'', both removed from Gastrioceras ( Branneroceras). References Goniatitida genera Reticuloceratidae Carboniferous ammonites of North America { ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Reticuloceratidae Reticuloceratidae is one of five families of the Gastrioceratoidea superfamily. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloids. Taxonomy Family consists of 2 valid subfamilies: Reticuloceratidae : Reticuloceratinae ::'' Agastrioceras'' ::'' Alurites'' ::''Aphantites ''Aphantites'' is a Lower Pennsylvanian ammonite Ammonoids are a group of extinct marine mollusc animals in the subclass Ammonoidea of the class Cephalopoda. These molluscs, commonly referred to as ammonites, are more closely related to li ...'' ::'' Arkanites'' ::'' Bilinguites'' ::'' Phillipsoceras'' ::'' Quinnites'' ::'' Reticuloceras'' ::'' Retites'' ::'' Tectiretites'' :* Surenitinae ::'' Gaitherites'' ::'' Marianoceras'' ::'' Melvilloceras'' ::'' Surenites'' ::'' Ugamites'' ::'' Verneuilites'' References The Paleobiology Databaseaccessed on 10/01/07 Goniatitida ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gastrioceratoidea Gastrioceratoidea is one of 17 superfamilies in the suborder Goniatitina, ammonoid cephalopods from the Late Paleozoic. Shells are variable in form with a broad whorl section and wide umbilicus. Early whorls are commonly evolute. Shells may be smooth or sculptured with transverse striae (fine grooves) and constrictions. The ventral lobe of the suture is double pronged, prongs being relatively wide but sides not diverging. The median saddle is half as high or more so than the height of the entire ventral lobe. The first lateral saddle, which lies next to the ventral lobe is either rounded or subacute. Gastrioceratoideae lived during the middle part of the Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago ( Mya), to the beginning of the Permian Period, million years ago. The name ''Carbonifero ..., from the latest Mississippian to the middle of the Pennsylv ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Carboniferous The Carboniferous ( ) is a geologic period and system of the Paleozoic that spans 60 million years from the end of the Devonian Period million years ago (Mya), to the beginning of the Permian Period, million years ago. The name ''Carboniferous'' means "coal-bearing", from the Latin '' carbō'' (" coal") and '' ferō'' ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern 'system' names, it was coined by geologists William Conybeare and William Phillips in 1822, based on a study of the British rock succession. The Carboniferous is often treated in North America as two geological periods, the earlier Mississippian and the later Pennsylvanian. Terrestrial animal life was well established by the Carboniferous Period. Tetrapods (four limbed vertebrates), which had originated from lobe-finned fish during the preceding Devonian, became pentadactylous in and diversified during the Carboniferous, including early amphibian lin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Gastrioceras ''Gastrioceras'' is a goniatitid genus in the family Gastrioceratidae that lived during the late Carboniferous (Pennsylvanian and for most of the Permian The Permian ( ) is a geologic period and stratigraphic system which spans 47 million years from the end of the Carboniferous Period million years ago (Mya), to the beginning of the Triassic Period 251.9 Mya. It is the last period of the Paleoz .... Taxonomy ''Gastrioceras'' is assigned to the Gastrioceratidae, a family that makes up part of the Gastriocerataceae, known in more recent references as Gastrioceratoidea. , Morphology The ''Gastrioceras'' shell, or conch, is subdiscoidal to subglobose in form with moderate to wide umbilicus. Ornament varies according to species, varying from simple transverse lirae to reticulate produced by the addition of faint longitudinal lirae. The umbilical shoulder is nodose, nodes elongated transversely. Some species have rather strong ribs. The suture is characterized by a ventral lo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Branneroceras ''Branneroceras'' is a goniatitid genus from the Late Carboniferous (Middle -Late Pennsylvanian). Their fossils have been found in Nunavut, Canada, and in Arkansas and Texas, USA. Taxonomy ''Branneroceras'' has been assigned to the Schistoceratidae, a family on goniatitid ammonoids included in the Schistocerataceae Schistoceratoidea is one of seventeen superfamilies of the Goniatitina suborder. They are an extinct group of ammonoid, which are shelled cephalopods related to squids, belemnites, octopuses, and cuttlefish, and more distantly to the nautiloid ..., now Schistoceratoidea. At one time ''Branneroceras'' was regarded as a subgenus of '' Gastrioceras'', ''Gastrioceras (Branneroceras)'', but ''Gastrioceras'' is included in the Gastrioceratidae. The type species for ''Branneroceras'' is ''Gastrioceras branneri'' Smith, 1896. Morphology The shell of ''Branneroceras'' is typically narrow, evolute, with a wide or moderately wide umbilicus. Coiling maybe slightly irregu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Goniatitida Genera Goniatids, informally goniatites, are ammonoid cephalopods that form the order Goniatitida, derived from the more primitive Agoniatitida during the Middle Devonian some 390 million years ago (around Eifelian stage). Goniatites (goniatitids) survived the Late Devonian extinction to flourish during the Carboniferous and Permian only to become extinct at the end of the Permian some 139 million years later. Morphology All goniatites possessed an external shell, which is divided internally into chambers filled with gas giving it buoyancy during the life of the animal. An open chamber at the front of the shell provided living space for the goniatitid animal, with access to open water through a ventral siphuncle. The general morphology and habit of goniatites was probably similar to that of their later relatives the ammonites, being free swimming and possessing a head with two well developed eyes and arms (or tentacles). Goniatite shells are small to medium in size, almost always ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]