Condraoceras

	Condraoceras ''Condraoceras'' is a genus of Liroceratidae, liroceratids from the Pennsylvanian of North America and Lower Permian of Europe with a compressed, involute, nautiliconic shell; subcircular whorl section; small umbilicus with a rounded shoulder; suture with shallow ventral and lateral lobes; and narrow subcentral siphuncle. ''Liroceras'', from the same time and type of the family, differs in having a reniform whorl section and essentially straight sutures at maturity. ''Peripetoceras'', another related genus, has a flattened venter, slight ventral and lateral lobes in the suture, and a siphuncle offset dorsally from the center. ''References'' * Bernhard Kummel, 1964. Nautiloidea -Nautilida; Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ of Kansas press, R.C. Moore (ed) -- Liroceratidae K444 -K447. Prehistoric nautiloid genera Pennsylvanian first appearances Lopingian genus extinctions {{Paleo-nautiloid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Liroceras ''Liroceras'' is a genus of nautiloid cephalopod. It is the type genus of the clydonautiliacean family, Liroceratidae Liroceratidae is an extinct family of nautilids, shelled marine molluscs, belonging to the Clydonautiloidea, consisting of generally smooth, involute, nautiliconic forms with a small umbilicus. The whorl section is usually depressed and broad ..., and is characterized by a rapidly expanding, subglobular, nautiliconic shell with a reniform whorl section, small umbilicus, essentially straight sutures, and a siphuncle with a variable but not marginal position.Bernhard Kummel, 1964. Nautiloidea-Nautilida; '' Treatise on Invertebrate Paleontology'', Part K. Geol Soc of America and Univ of Kansas Press, R. C. Moore (ed) — Liroceratidae K444–K447. ''Liroceras'' has a temporal range from the Mississippian to the Permian period, the longest of the Liroceratidae. It has been found in North America, Europe, China and the East Indies. A similar genus, '' Condr ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Liroceratidae Liroceratidae is an extinct family of nautilids, shelled marine molluscs, belonging to the Clydonautiloidea, consisting of generally smooth, involute, nautiliconic forms with a small umbilicus. The whorl section is usually depressed and broadly rounded, the suture only slightly sinuous, and the siphuncle usually more or less central. The Liroceratidae range from the Mississippian well into the Triassic and may even extend down into the upper Devonian. The Liroceratidae are probably derived from the Rutoceratidae and form the root stock of the Clydonautiloidea. They also provide the basis for the name for Shimankiy's Lirocerina, a suborder mostly equivalent to the Clydonautilaceae. The Liroceratidae gave rise to the Ephippioceratidae early in the Mississippian, which extend well into the Permian, and to the Clydonautilidae, Gonionautilidae, and Siberionautilidae Siberionautilidae is a family in the nautilid superfamily Clydonautiloidea that contains only the genus ''Sibe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Peripetoceras ''Peripetoceras'' is a genus in the Clydonautilacean family, Liroceratidae. It can be recognized by its smooth, involute shell with a deep small umbilicus with rounded shoulders and steep convex wall; whorl section with flattened venter, rounded ventral shoulders and convergent slightly convex flanks; suture with slight ventral and lateral lobes; and small siphuncle located dorsally of the center. ''Peripetoceras'' ranges from the Lower Carboniferous (Upper Mississippian Mississippian may refer to: * Mississippian (geology), a subperiod of the Carboniferous period in the geologic timescale, roughly 360 to 325 million years ago Mississippian culture, a culture of Native American mound-builders from 900 to 1500 AD ...) to the Permian and has been found in Europe (England and Germany), Russia and China. References Bernhard Kummel, 1964. Nautiloidea -Nautilida; Treatise on Invertebrate Paleontology, Part K. Geol Soc of America and Univ of Kansas press, R.C. Moore (ed) -- ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Treatise On Invertebrate Paleontology The ''Treatise on Invertebrate Paleontology'' (or ''TIP'') published by the Geological Society of America and the University of Kansas Press, is a definitive multi-authored work of some 50 volumes, written by more than 300 paleontologists, and covering every phylum, class, order, family, and genus of fossil and extant (still living) invertebrate animals. The prehistoric invertebrates are described as to their taxonomy, morphology, paleoecology, stratigraphic and paleogeographic range. However, taxa with no fossil record whatsoever have just a very brief listing. Publication of the decades-long ''Treatise on Invertebrate Paleontology'' is a work-in-progress; and therefore it is not yet complete: For example, there is no volume yet published regarding the post-Paleozoic era caenogastropods (a molluscan group including the whelk and Common periwinkle, periwinkle). Furthermore, every so often, previously published volumes of the ''Treatise'' are revised. Evolution of the proje ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
picture info	Prehistoric Nautiloid Genera Prehistory, also known as pre-literary history, is the period of human history between the use of the first stone tools by hominins 3.3 million years ago and the beginning of recorded history with the invention of writing systems. The use of symbols, marks, and images appears very early among humans, but the earliest known writing systems appeared 5000 years ago. It took thousands of years for writing systems to be widely adopted, with writing spreading to almost all cultures by the 19th century. The end of prehistory therefore came at very different times in different places, and the term is less often used in discussing societies where prehistory ended relatively recently. In the early Bronze Age, Sumer in Mesopotamia, the Indus Valley Civilisation, and ancient Egypt were the first civilizations to develop their own scripts and to keep historical records, with their neighbors following. Most other civilizations reached the end of prehistory during the following Iron Age. T ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]
	Pennsylvanian First Appearances Pennsylvanian may refer to: * A person or thing from Pennsylvania * Pennsylvanian (geology), a geological subperiod of the Carboniferous Period * Pennsylvanian (train), ''Pennsylvanian'' (train), an Amtrak train {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu]