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Pseudohaloritoidea
Pseudohaloritoidea, formerly Pseudohaloritaceae, is one of four superfamilies of the goniatitid suborder Tornoceratatina. Although attributed the Ruzhencev, 1957 (Ruzhencev named the Pseudohaloritidae, March 1957, eight months ahead of Miller and Furnish) T.J Frest ''et al.'' included the Maximitidae and Pseudohaloritidae in the Cheilocerataceae in their May 1981 paper. References * T.J Frest, B.F.Glenister,& W.M. Furnish, 1981. Pennsylvanian-Permian Ammonoid Families Maximitidae and Pseudohaloritiae. The Paleontological Society Memoir 11, May 1981GONIAT5/28/12 The Paleobiology Database5/28/12 Tornoceratina Goniatitida superfamilies Pennsylvanian first appearances Lopingian extinctions {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pseudohaloritidae
Pseudohaloritidae is the larger of two families that form the goniatitid superfamily Pseudohaloritoidea, the other being the monogenerc Maximitidae. They are part of the vast array of shelled cephalopods known as ammonoids that are more closely related to squids, belemnites, octopuses, and cuttlefish, than to the superficially similar ''Nautilus''.The Paleobiology Database 11/17/09 The Pseudohaloritide which now contains some 14 genera in three subfamilies is characterized by small, subdiscoidal to subglobular, involute shells, the surface of which may be smooth or with coarse longitudinal lirae and/or transverse ribs. The is retrosiphonitic, a hold-over character from the |
Maximitidae
''Maximites'' is a genus of Late Carboniferous ammonoids. Adult specimens were the smallest known ammonoids, only at about in diameter of shells. Fossils are found in various Late Carboniferous marine strata in North America. ''Maximites'' is the sole genus of Maximitidae, one of two families of the Superfamily Pseudohaloritoidea, an important subgroup of the order Goniatitida. See also * Smallest organisms The smallest organisms found on Earth can be determined according to various aspects of organism size, including volume, mass, height, length, or genome size. Given the incomplete nature of scientific knowledge, it is possible that the smallest or ... References The Paleobiology Databaseaccessed on 10/01/07 Pseudohaloritoidea Goniatitida genera Carboniferous cephalopods Ammonites of North America Paleozoic life of Nunavut {{Goniatitida-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Tornoceratatina
Tornoceratina is one of two suborders included in the Goniatitida, characterized by generally involute, subdiscoidal shells and by sutures in which the ventral ones are undivided. Sutural lobes increase in number during the course of life of the individual, typically developed from the internal and external saddles. The siphuncle is prochoanitic, with septal necks projecting forward. Derivation is from the Anarcestida Agoniatitida, also known as the Anarcestida, is the ancestral order within the cephalopod subclass Ammonoidea originating from bactritoid nautiloids, that lived in what would become Africa, Asia, Australia, Europe, and North America during the ... in the middle Devonian. References * Miller, Furnish, and Schindewolf, 1957. Paleozoic Ammonoidea. Treastise on Invertebrate Paleontology, Part L. Geological Society of America. * Tornoceratina iGoniaton line, Mar. 5, 2015 The Paleobiology DatabaseOct.1, 2007 Goniatitida Middle Devonian first appearances ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvanian (geology)
The Pennsylvanian ( , also known as Upper Carboniferous or Late Carboniferous) is, on the International Commission on Stratigraphy, ICS geologic timescale, the younger of two period (geology), subperiods of the Carboniferous Period (or the upper of two system (stratigraphy), subsystems of the Carboniferous System). It lasted from roughly . As with most other geochronology, geochronologic units, the stratum, rock beds that define the Pennsylvanian are well identified, but the exact date of the start and end are uncertain by a few hundred thousand years. The Pennsylvanian is named after the U.S. state of Pennsylvania, where the coal Bed (geology), beds of this age are widespread. The division between Pennsylvanian and Mississippian (geology), Mississippian comes from North American stratigraphy. In North America, where the early Carboniferous beds are primarily marine limestones, the Pennsylvanian was in the past treated as a full-fledged geologic period between the Mississippian ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Permian
The Permian ( ) is a geologic period and System (stratigraphy), 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 251.902 Mya. It is the sixth and last period of the Paleozoic Era; the following Triassic Period belongs to the Mesozoic Era. The concept of the Permian was introduced in 1841 by geologist Sir Roderick Murchison, who named it after the Perm Governorate, region of Perm in Russia. The Permian witnessed the diversification of the two groups of amniotes, the synapsids and the Sauropsida, sauropsids (reptiles). The world at the time was dominated by the supercontinent Pangaea, which had formed due to the collision of Euramerica and Gondwana during the Carboniferous. Pangaea was surrounded by the superocean Panthalassa. The Carboniferous rainforest collapse left behind vast regions of desert within the continental interior. Amniotes, which could better cope with these ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ruzhencev
Vasily Yermolayevich Ruzhentsev (; 4 April 1899 – 12 October 1978) was a Soviet paleontologist, malacologist and geologist A geologist is a scientist who studies the structure, composition, and History of Earth, history of Earth. Geologists incorporate techniques from physics, chemistry, biology, mathematics, and geography to perform research in the Field research, .... From 1937 to 1978 he worked at the Paleontological Institute of Russian Academy of Sciences. He had 117 publications of which 17 were monographs. From 1966 to 1978 he was editor in chief of the '' Transactions of the Paleontological Institute''. Sources * Leonova, T.P. (2009) In: Современные проблемы изучения головоногих моллюсков. Морфология, систематика, эволюция, экология и биостратиграфия. - Russian Academy of Sciences (Jubilee symposium volume) 1899 births 1978 deaths People from Dukhovshchinsky ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Superfamily (taxonomy)
In biology, taxonomic rank (which some authors prefer to call nomenclatural rank because ranking is part of nomenclature rather than taxonomy proper, according to some definitions of these terms) is the relative or absolute level of a group of organisms (a ''taxon'') in a hierarchy that reflects evolutionary relationships. Thus, the most inclusive clades (such as Eukarya and Animalia) have the highest ranks, whereas the least inclusive ones (such as ''Homo sapiens'' or ''Bufo bufo'') have the lowest ranks. Ranks can be either relative and be denoted by an indented taxonomy in which the level of indentation reflects the rank, or absolute, in which various terms, such as species, genus, family, order, class, phylum, kingdom, and domain designate rank. This page emphasizes absolute ranks and the rank-based codes (the Zoological Code, the Botanical Code, the Code for Cultivated Plants, the Prokaryotic Code, and thCode for Viruses require them. However, absolute ranks are not req ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Goniatitida
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 alway ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pennsylvanian First Appearances
Pennsylvanian may refer to: * A person or thing from Pennsylvania * Pennsylvanian (geology) The Pennsylvanian ( , also known as Upper Carboniferous or Late Carboniferous) is, on the International Commission on Stratigraphy, ICS geologic timescale, the younger of two period (geology), subperiods of the Carboniferous Period (or the uppe ..., a geological subperiod of the Carboniferous Period * ''Pennsylvanian'' (train), an Amtrak train {{disambiguation ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
