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Piney Point Formation
The Piney Point Formation is a geologic formation in Virginia. It preserves fossils dating back to the Lutetian Stage of the Eocene Epoch of the Paleogene period. Species The following species are known from this formation. Keep in mind, this formation is vastly understudied, so the fauna represented is poorly known. Chondrichthyans *'' Carcharocles auriculatus'' *''Galeocerdo eaglesomi'' *''Nebrius thielensis'' *''Striatolamia macrota'' *'' Carcharias hopei'' *'' Carcharias acutissima'' *'' Jaekelotodus trigonalis'' *''Isurus praecursor'' *'' Scyliorhinus gilbberti'' *''Abdounia beaugei'' *''Abdounia lapierrei'' *''Abdounia recticona'' *'' Adbounia spp.'' *''Galeocerdo latidens'' *''Hemipristis curvatus?'' *'' Carcarhinus gibbesi'' *'' Galeorhinus ypresiensis'' *''Galeorhinus sp.'' *'' Physogaleus secundus'' *'' Coupatezia woutersi'' *'' Pristis lathami'' *'' Rhynchobatus vincenti'' *'' Rhinobatis bruxelliensis'' *'' Aetobatus irregularis'' *'' Myliobatis dixoni'' *''Myliobatis ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Formation (stratigraphy)
A geological formation, or simply formation, is a body of rock having a consistent set of physical characteristics (lithology) that distinguishes it from adjacent bodies of rock, and which occupies a particular position in the layers of rock exposed in a geographical region (the stratigraphic column). It is the fundamental unit of lithostratigraphy, the study of strata or rock layers. A formation must be large enough that it can be mapped at the surface or traced in the subsurface. Formations are otherwise not defined by the thickness of their rock strata, which can vary widely. They are usually, but not universally, tabular in form. They may consist of a single lithology (rock type), or of alternating beds of two or more lithologies, or even a heterogeneous mixture of lithologies, so long as this distinguishes them from adjacent bodies of rock. The concept of a geologic formation goes back to the beginnings of modern scientific geology. The term was used by Abraham Gottlob W ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcharias
''Carcharias'' is a genus of sand tiger sharks belonging to the family Odontaspididae. Once bearing many prehistoric species, all have gone extinct with the exception of the critically endangered sand tiger shark. Description ''Carcharias'' are 2.5 m long on average. The maximum weight of the shark is 158.8 kg. Differentiating species of sharks is usually done by locating and measuring their fins. The second dorsal fin and the anal fin of ''Carcharias'' are very large. In fact, they are about equal in size. The pectoral fins are triangular and only slightly larger than the dorsal fins. The teeth are very long and narrow with sharp points. The teeth are smooth with no ridges. The tail is one third of the entire body size. Diet ''Carcharias'' species hunt bony fish, small sharks, rays, squids, crabs, and lobsters. Habitat Sand tiger sharks live in water depths ranging from 0 to 190 meters. They are found in the Pacific, Atlantic, and Indian oceans. They are commonl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Pristis Lathami
''Pristis lathami'' is a species of extinct sawfish in the family Pristidae. It lived in the Eocene era, in areas in Egypt, Nigeria, Togo, the United Kingdom, the United States, and Western Sahara, in marine areas, estuaries, bay A bay is a recessed, coastal body of water that directly connects to a larger main body of water, such as an ocean, a lake, or another bay. A large bay is usually called a Gulf (geography), gulf, sea, sound (geography), sound, or bight (geogra ...s, open shallow subtidal areas, coastal, marginal marine areas, deep waters, offshore, and fluvial-deltaic areas. ''P. lathami'' has 53 occurrences, with 1 being found in Egypt with a rostal tooth about 10 cm in length. References lathami Fossil taxa described in 1837 Prehistoric fish of Africa Prehistoric fish of North America Prehistoric fish of Europe Fossils of Nigeria Fossils of Egypt {{paleo-batoid-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Coupatezia
''Coupatezia'' is a prehistoric genus of ray in the family Dasyatidae whose fossils are found in strata dating from the Maastrichtian stage until the last species' extinction during the Middle Eocene. These rays were found shallow seas in Europe, Africa and the eastern United States. Classification Species *''Coupatezia fallax'' *''Coupatezia trempina'' (Maastrichtian "Kemp Clay" stratum of Texas) *''Coupatezia turneri'' *''Coupatezia woutersi'' (Lutetian Virginia) See also * Flora and fauna of the Maastrichtian stage * List of prehistoric cartilaginous fish (Chondrichthyes) This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely vernacula ... References External links *Elasmo.com "The Life and Times of Long Dead Sharks Myliobatiformes Cretaceous cartilaginous fish Paleocene fish Eoce ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Physogaleus
''Physogaleus'' is a small genus of prehistoric shark that lived from the Eocene to Miocene epochs. Description ''Physogaleus'' are only known from their fossil teeth and isolated vertebra. It has teeth similar to the modern tiger shark, but smaller. Species of ''Physogaleus'' were originally described as being teeth of extinct tiger shark The tiger shark (''Galeocerdo cuvier'') is a species of requiem shark and the last extant member of the family Galeocerdonidae. It is a large macropredator, capable of attaining a length over . Populations are found in many tropical and temper ... species in the genus ''Galeocerdo''. Recognition of numerous differences in tooth anatomies of these species with other species of ''Galeocerdo'' lead researchers to erect the genus ''Physogaleus''.Hernandez, C. 2015. Paleobiology of the Mio-Pliocene sharks, with emphasis on the extinct apex predator ''Carcharocles megalodon''. University of Florida. Unpublished Ph.D. Dissertation ''Physogaleus' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galeorhinus
The school shark (''Galeorhinus galeus'') is a houndshark of the family Triakidae, and the only member of the genus ''Galeorhinus''. Common names also include tope, tope shark, snapper shark, and soupfin shark. It is found worldwide in temperate seas at depths down to about . It can grow to nearly long. It feeds both in midwater and near the seabed, and its reproduction is ovoviviparous. This shark is caught in fisheries for its flesh, its fins, and its liver, which has a very high vitamin A content. The IUCN has classified this species as critically endangered in its Red List of Threatened Species. Description The school shark is a small, shallow-bodied shark with an elongated snout. The large mouth is crescent-shaped and the teeth are of a similar size and shape in both jaws. They are triangular-shaped, small, and flat, set at an oblique angle facing backwards, serrated and with a notch. The spiracles are small. The first dorsal fin is triangular with a straight leading edge ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carcharhinus
''Carcharhinus'' is the type genus of the family Carcharhinidae, the requiem sharks. One of 12 genera in its family, it contains over half of the species therein. It contains 35 extant and eight extinct species to date, with likely more species yet to be described. Species Extant T Type species Fossil See also * List of prehistoric cartilaginous fish genera This list of prehistoric cartilaginous fish genera is an attempt to create a comprehensive listing of all genera that have ever been included in the class chondrichthyes ''and'' are known from the fossil record. This list excludes purely vernacula ... References Bibliography * * * * * * * {{Taxonbar, from=Q312359 Shark genera Extant Eocene first appearances Taxa named by Henri Marie Ducrotay de Blainville ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemipristis
''Hemipristis'' (from el, ἡμι , 'half' and el, πρίστης 'saw') is a genus of weasel sharks, family Hemigaleidae. It contains one extant species, the snaggletooth shark (''H. elongata'') and several extinct species. ''Hemipristis'' has two distinct types of teeth in each section of its jaw. The ones on the upper jaw act as knives, cutting through the flesh of the prey, while the pointed ones on the bottom act as forks, spearing the prey and holding it down. Because this shark was poorly studied in the past and its top and bottom jaw teeth differ to such a great degree, its top and lower jaw teeth were assigned to a separate genus in the past. Species * '' Hemipristis elongata'' (Klunzinger, 1871) * †'' Hemipristis curvatus'' * †'' Hemipristis serra'' - An extinct species from the Oligocene-Miocene of Florida, South Carolina, and other areas on the Atlantic coast. See also * List of prehistoric cartilaginous fish This list of prehistoric cartilaginous fish gene ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdounia Recticona
''Abdounia recticona'' is an extinct species of requiem shark Requiem sharks are sharks of the family Carcharhinidae in the order Carcharhiniformes. They are migratory, live-bearing sharks of warm seas (sometimes of brackish or fresh water) and include such species as the tiger shark, bull shark, lem ... from the Eocene epoch. It is known from isolated teeth in Europe and North America. References {{Taxonbar, from=Q104850503 Carcharhinidae Prehistoric sharks Eocene sharks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdounia Lapierrei
''Abdounia'' is an extinct genus of requiem shark which lived during the Paleogene period. It is mainly known from isolated teeth. It is one of the earliest requiem sharks, and attained widespread success in North America, Europe, and Africa. Locations They are known from the paleogene of Morocco, France, Belgium, Russia, North Carolina, Georgia, Alabama, and Virginia. In the lower Nanjemoy Formation of Virginia, they are the most common fossil shark tooth. By the end of the Oligocene Epoch the genus is severely reduced, probably due to competition with other Carcharhiniformes like Carcharhinus. Species The following are species currently attributed to this genus. Note this may be an under-representation of actual diversity, as living relatives have extremely similar teeth across species. *''Abdounia africana'' (Danian-Thanetian) *''Abdounia beaugei'' (Paleocene-Eocene ) *''Abdounia enniskelleni'' (Eocene) *'' Abdounia furimskyi'' (upper Eocene-Rupelian ) *'' Abdounia lapierre ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Abdounia Beaugei
''Abdounia beaugei'' is an extinct species of requiem shark from the Paleocene and Eocene epochs of the Paleogene The Paleogene ( ; British English, also spelled Palaeogene or Palæogene; informally Lower Tertiary or Early Tertiary) is a geologic period, geologic period and system that spans 43 million years from the end of the Cretaceous Period million yea ... period. It is known from North Africa, Europe, and North America. References {{Taxonbar, from=Q104850368 Carcharhinidae Prehistoric sharks ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
