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Ptychotrygon Striata
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei Sclerorhynchoidei is an extinct suborder of rajiform rays that had long rostra with large denticles similar to sawfishes and sawsharks. This feature was convergently evolved and their closest living relatives are actually skates. While they .... Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †'' Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †'' Ptychotrygon rostrispatula'' * †'' Ptychotrygon striata'' * †'' Ptychotrygon triangularis'' * †'' Ptychotrygon vermiculata'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous
The Late Cretaceous (100.5–66 Ma) is the younger of two epochs into which the Cretaceous Period is divided in the geologic time scale. Rock strata from this epoch form the Upper Cretaceous Series. The Cretaceous is named after ''creta'', the Latin word for the white limestone known as chalk. The chalk of northern France and the white cliffs of south-eastern England date from the Cretaceous Period. Climate During the Late Cretaceous, the climate was warmer than present, although throughout the period a cooling trend is evident. The tropics became restricted to equatorial regions and northern latitudes experienced markedly more seasonal climatic conditions. Geography Due to plate tectonics, the Americas were gradually moving westward, causing the Atlantic Ocean to expand. The Western Interior Seaway divided North America into eastern and western halves; Appalachia and Laramidia. India maintained a northward course towards Asia. In the Southern Hemisphere, Australia and Ant ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Geyeri
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †'' Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †'' Ptychotrygon rostrispatula'' * †''Ptychotrygon striata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' * †'' Ptychotrygon triangularis'' * †'' Ptychotrygon vermiculata'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Late Cretaceous Cartilaginous Fish
Late may refer to: * LATE, an acronym which could stand for: ** Limbic-predominant age-related TDP-43 encephalopathy, a proposed form of dementia ** Local-authority trading enterprise, a New Zealand business law ** Local average treatment effect, a concept in econometrics Music * ''Late'' (album), a 2000 album by The 77s * Late!, a pseudonym used by Dave Grohl on his ''Pocketwatch'' album * Late (rapper), an underground rapper from Wolverhampton * "Late" (song), a song by Blue Angel * "Late", a song by Kanye West from ''Late Registration'' Other * Late (Tonga), an uninhabited volcanic island southwest of Vavau in the kingdom of Tonga * "Late" (''The Handmaid's Tale''), a television episode * LaTe, Oy Laivateollisuus Ab, a defunct shipbuilding company * Late may refer to a person who is Dead See also * * * ''Lates'', a genus of fish in the lates perch family * Later (other) * Tardiness * Tardiness (scheduling) In scheduling, tardiness is a measure of a delay in exe ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Prehistoric Cartilaginous Fish 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. ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Vermiculata
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †'' Ptychotrygon rostrispatula'' * †''Ptychotrygon striata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' * †'' Ptychotrygon triangularis'' * †'' Ptychotrygon vermiculata'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Triangularis
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †'' Ptychotrygon rostrispatula'' * †''Ptychotrygon striata'' * †'' Ptychotrygon triangularis'' * †''Ptychotrygon vermiculata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Striata
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei Sclerorhynchoidei is an extinct suborder of rajiform rays that had long rostra with large denticles similar to sawfishes and sawsharks. This feature was convergently evolved and their closest living relatives are actually skates. While they .... Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †'' Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †'' Ptychotrygon rostrispatula'' * †'' Ptychotrygon striata'' * †'' Ptychotrygon triangularis'' * †'' Ptychotrygon vermiculata'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North Americ ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Rostrispatula
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †'' Ptychotrygon rostrispatula'' * †''Ptychotrygon striata'' * †''Ptychotrygon triangularis'' * †''Ptychotrygon vermiculata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America S ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Pustulata
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †'' Ptychotrygon pustulata'' * †''Ptychotrygon rostrispatula'' * †''Ptychotrygon striata'' * †''Ptychotrygon triangularis'' * †''Ptychotrygon vermiculata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America Sc ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Mcnultyi
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †'' Ptychotrygon mcnultyi'' * †''Ptychotrygon pustulata'' * †''Ptychotrygon rostrispatula'' * †''Ptychotrygon striata'' * †''Ptychotrygon triangularis'' * †''Ptychotrygon vermiculata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America Scl ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ptychotrygon Eutawensis
''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhynchoidei. Species The following species are considered valid: * †'' Ptychotrygon blainensis'' * †'' Ptychotrygon eutawensis'' * †''Ptychotrygon geyeri'' * †''Ptychotrygon mcnultyi'' * †''Ptychotrygon pustulata'' * †''Ptychotrygon rostrispatula'' * †''Ptychotrygon striata'' * †''Ptychotrygon triangularis'' * †''Ptychotrygon vermiculata ''Ptychotrygon'' is a genus of sawfish-like Late Cretaceous ray whose fossils have been found worldwide. It, '' Ptychotrygonoides'', '' Texatrygon'', and '' Asflapristis'' are members of the family Ptychotrygonidae within the suborder Sclerorhy ...'' References Prehistoric cartilaginous fish genera Late Cretaceous cartilaginous fish Late Cretaceous fish of North America Scle ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Sawfish
Sawfish, also known as carpenter sharks, are a family of rays characterized by a long, narrow, flattened rostrum, or nose extension, lined with sharp transverse teeth, arranged in a way that resembles a saw. They are among the largest fish with some species reaching lengths of about . They are found worldwide in tropical and subtropical regions in coastal marine and brackish estuarine waters, as well as freshwater rivers and lakes. They are endangered. They should not be confused with sawsharks (order Pristiophoriformes) or the extinct sclerorhynchoids (order Rajiformes) which have a similar appearance, or swordfish (family Xiphiidae) which have a similar name but a very different appearance. Sawfishes are relatively slow breeders and the females give birth to live young. They feed on fish and invertebrates that are detected and captured with the use of their saw. They are generally harmless to humans, but can inflict serious injuries with the saw when captured and defend ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
