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Bromsgrove Sandstone
The Bromsgrove Sandstone is a geologic formation of the Sherwood Sandstone Group in England. It preserves fossils and ichnofossils of '' Chirotherium barthii'', and '' Chirotherium sickleri'', dating back to the Middle Triassic (Anisian) period. at .org Fossil content * '' Bromsgroveia walkeri'' * '' Bromsgroviscorpio willsi'' * ''[...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 (geology), 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 ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mastodonsaurus
''Mastodonsaurus'' (meaning "teat tooth lizard") is an extinct genus of temnospondyl amphibian from the Middle Triassic of Europe. It belongs to a Triassic group of temnospondyls called Capitosauria, characterized by their large body size, large flattened skulls, and probably mainly aquatic lifestyles. ''Mastodonsaurus'' remains one of the largest amphibians known, and may have exceeded 6 meters (20 feet) in length. Description Like those of many other capitosaurs, the head of ''Mastodonsaurus'' was triangular, reaching about in the largest specimens. Narrow grooves on the surface of the skull bones called sulci show it had sensory organs that could detect vibrations and pressure under water, similar to the lateral lines on fish. The large, oval eye sockets are midway along the skull with the nostrils near the tip of the snout. Small ear holes (otic notches) are indented on either side of the back of the skull. The upper surface of the skull bones of ''Mastodonsaurus'' bore a ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Gyrolepis
''Gyrolepis'' is an extinct genus of prehistoric ray-finned fish from the Middle-Late Triassic epochs in what is now Europe. It is known both from complete specimens and isolated skeletal elements, such as scales or teeth. See also * Prehistoric fish * List of prehistoric bony fish This list of prehistoric bony fish is an attempt to create a comprehensive listing of all Genus, genera from the fossil record that have ever been considered to be bony fish (class Osteichthyes), excluding purely vernacular terms. The list includ ... References External links Bony fish in the online Sepkoski Database Prehistoric ray-finned fish genera Palaeonisciformes {{Palaeonisciformes-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Dipteronotus
''Dipteronotus'' is an extinct genus of marine stem-neopterygian ray-finned fish that existed during the Middle and Late Triassic epochs in what is now Europe (France, Germany, Italy, England) and Morocco. As a typical feature, it had several ridge scales in front of its dorsal fin that created a spine-like structure. Taxonomy The following species are known: * ''D. aculeatus'' (Jörg, 1969) - Early Anisian of France * ''D. gibbosus'' Martin, 1980 - Carnian of Morocco ( Timezgadiouine Formation) * ''D. cyphus'' Egerton, 1854 - Late Anisian of England (Otter Sandstone Formation) * ''D. olgiatii'' Tintori, 1990 - Late Ladinian of Italy ( Meride Formation, Monte San Giorgio) The species ''D. ornatus'' Bürgin 1992 from the Besano Formation of Switzerland has been reassigned to the polzbergiid genus '' Stoppania''. Synonymy ''Dipteronotus ornatus'' Bürgin, 1992 → '' Stoppania ornata'' (Bürgin, 1992) See also * Prehistoric fish * List of prehistoric bony fish This list ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrodus
''Acrodus'' (from , 'high' and 'tooth') is an extinct genus of hybodont spanning from the Early Triassic to the Late Jurassic. (The Early Cretaceous species ''"Acrodus" nitidus'' affinity to the genus is questionable.) It was durophagous Durophagy is the eating behavior of animals that consume hard-shelled or exoskeleton-bearing organisms, such as corals, shelled mollusks, or crabs. It is mostly used to describe fish, but is also used when describing reptiles, including fossil t ..., with blunt, broad teeth designed for crushing and grinding. Some Middle Triassic species have been suggested to have grown to lengths of . Species are known from both marine and freshwater environments, with all Middle and Late Jurassic species only known from freshwater. Species *''Acrodus acuminatus'' *''Acrodus acutus'' *''Acrodus alexandrae'' *''Acrodus alpinus'' *''Acrodus anningiae'' *''Acrodus angustus'' *''Acrodus braunii'' *''Acrodus (Acronemus) bicarenatus *''Acrodus cuneocostatus'' ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Rhombopholis
''Rhombopholis'' is an extinct genus of archosauromorph reptile known from England. The type species of ''Rhombopholis'' is ''Rhombopholis scutulata''. Specimens of this genus were collected from the Leamington quarry, near Warwick. This locality belongs to the Bromsgrove Sandstone Formation, which is dated to the Anisian age of the Middle Triassic, approximately 245 million years ago. Description ''Rhombopholis'' is known from several different specimens. WARMS Gz10, a sandstone block containing vertebrae and limb bones from two different individuals, as well as fish scales and vertebrae, has been designated the lectotype of the genus. Other specimens include WARMS Gz21 (the proximal part of a left femur), WARMS Gz4714 (a left ilium), and CAMSM G.343 (a back vertebra). ''Rhombopholis'' lacks distinguishing features, but is believed to be a " prolacertiform" (an outdated term for a basal archosauromorph) due to having low neural spines. The smaller individual present in WARM ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Palaeosaurus
''Palaeosaurus'' (or ''Paleosaurus'') is a genus of indeterminate archosaur known from two teeth found in the Bromsgrove Sandstone Formation and also either the Magnesian Conglomerate or the Avon Fissure Fill of Clifton, Bristol, England (originally Avon). It has had a convoluted taxonomic history. Richard Owen's mistake of associating prosauropod skeletal remains with the carnivorous teeth which Riley and Stutchbury called ''Palaeosaurus'', combined with Friedrich von Huene's '' Teratosaurus minor'', which was also a combination of carnivore and prosauropod remains, led paleontologists to view prosauropods as carnivorous animals for quite a long time. This error was included in several textbooks and other dinosaur reference works. History and classification Nineteenth century In the autumn of 1834, surgeon Henry Riley (1797–1848) and the curator of the Bristol Institution, Samuel Stutchbury (15 January 1798 – 12 February 1859), began to excavate " saurian remains" ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
