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Missão Velha Formation
The Missão Velha Formation is a late Jurassic geologic formation in northeastern Brazil's Araripe Basin where the states of Pernambuco, Piauí and Ceará come together. The formation is the middle stratigraphic unit of the Vale do Carirí Group, overlying the Brejo Santo Formation and overlain by the Abaiara Formation. The formation comprises whitish fine-to-medium quartzose arenites, with subrounded to rounded grains, deposited in an alluvial fan environment during the syn-rift phase of the Araripe Basin. The Missão Velha Formation has provided macrofossils of various genera of fish and reptiles as snakes, crocodylomorphs and turtles. Ichnofossils of dinosaurs were also discovered in the formation. Geology Fossil content The following fossils were reported from the formation: [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Geological Formation
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 Wer ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Ichnofossil
A trace fossil, also known as an ichnofossil (; from el, ἴχνος ''ikhnos'' "trace, track"), is a fossil record of biological activity but not the preserved remains of the plant or animal itself. Trace fossils contrast with body fossils, which are the fossilized remains of parts of organisms' bodies, usually altered by later chemical activity or mineralization. The study of such trace fossils is ichnology and is the work of ichnologists. Trace fossils may consist of impressions made on or in the substrate by an organism. For example, burrows, borings ( bioerosion), urolites (erosion caused by evacuation of liquid wastes), footprints and feeding marks and root cavities may all be trace fossils. The term in its broadest sense also includes the remains of other organic material produced by an organism; for example coprolites (fossilized droppings) or chemical markers (sedimentological structures produced by biological means; for example, the formation of stromatolites). ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Reptile
Reptiles, as most commonly defined are the animals in the class Reptilia ( ), a paraphyletic grouping comprising all sauropsids except birds. Living reptiles comprise turtles, crocodilians, squamates (lizards and snakes) and rhynchocephalians (tuatara). As of March 2022, the Reptile Database includes about 11,700 species. In the traditional Linnaean classification system, birds are considered a separate class to reptiles. However, crocodilians are more closely related to birds than they are to other living reptiles, and so modern cladistic classification systems include birds within Reptilia, redefining the term as a clade. Other cladistic definitions abandon the term reptile altogether in favor of the clade Sauropsida, which refers to all amniotes more closely related to modern reptiles than to mammals. The study of the traditional reptile orders, historically combined with that of modern amphibians, is called herpetology. The earliest known proto-reptiles originated around ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Vinctifer
''Vinctifer'' is an extinct genus of prehistoric bony fish erected by David Starr Jordan in 1919. Fossil record This genus is known in the fossil record from the Late Jurassic (Kimmeridgian) to the Aptian stage of the Early Cretaceous epoch (age range: from 150.8 to 109.0 million years ago.).Sepkoski, Jack (2002A compendium of fossil marine animal generaBulletins of American Paleontology Fossils within this genus have been found in the Marizal, Romualdo and Missão Velha Formations of Brazil, Tlayua Formation of Mexico, Apón Formation of Venezuela and Ameghino Formation of Antarctica.''Vinctifer'' at Fossilworks
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Neoceratodus
''Neoceratodus'' is a genus of lungfish in the family Neoceratodontidae. The extant Australian lungfish (''Neoceratodus forsteri'') is the only surviving member of this genus, but it was formerly much more widespread, being distributed throughout Africa, Australia, and South America. Species were also much more diverse in body plan; for example, the Cretaceous species '' Neoceratodus africanus'' was a gigantic species that coexisted with ''Spinosaurus'' in what is now the Kem Kem Formation of Morocco. The earliest fossils from this genus are of ''Neoceratodus potkooroki'' from the mid Cretaceous (Albian-Cenomanian) Griman Creek Formation of Australia, remains from the Late Jurassic of Uruguay assigned to this genus probably do not belong to the genus. Species The following species are currently classified in this genus: * †'' Neoceratodus africanus'' * †'' Neoceratodus eyrensis'' * ''Neoceratodus forsteri'' (Queensland lungfish) *†'' Neoceratodus potkooroki'' * †'' Neo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Lepidotes
''Lepidotes'' (from el, λεπιδωτός , 'covered with scales') (previously known as ''Lepidotus'') is an extinct genus of Mesozoic ray-finned fish. It has been considered a wastebasket taxon, characterised by "general features, such as thick rhomboid scales and, for most of the species, by semi-tritorial or strongly with dozens of species assigned to it. Fossils attributed to ''Lepidotes'' have been found in Jurassic and Cretaceous rocks worldwide.López-Arbarello, A. (2012).Phylogenetic Interrelationships of Ginglymodian Fishes (Actinopterygii: Neopterygii). ''PLoS One'', 7(7): e39370. It has been argued that ''Lepidotes'' should be restricted to species closely related to the type species ''L. gigas,'' which are only known from the Early Jurassic of Central Europe, with most other species being not closely related, with other species transferred to new genera such as ''Scheenstia.'' ''Lepidotes'' belongs to Ginglymodi, a clade of fish whose only living representatives are ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hybodus
''Hybodus'' (from el, ύβος , 'crooked' and el, ὀδούς 'tooth') is an extinct genus of hybodont, a group of shark-like elasmobranchs that lived from the Late Devonian to the end of the Cretaceous. Species closely related to the type species ''Hybodus reticulatus'' lived during the Early Jurassic epoch. Numerous species have been assigned to ''Hybodus'' spanning a large period of time, and it is currently considered a wastebasket taxon that is 'broadly polyphyletic' and requires reexamination. The first fossilized teeth from ''Hybodus'' were found in England around 1845; since then teeth (and dorsal spines) have been recovered from Europe. During the Triassic, Jurassic, and Cretaceous periods, the hybodonts were especially successful and could be found in shallow seas around the world. For reasons that are not fully understood, the hybodonts became extinct near the end of the Late Cretaceous period. Description ''Hybodus'' species grew to about in length. It was not ver ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Acrodus
''Acrodus'' (from el, άκρος , 'high' and el, ὀδούς 'tooth') is an extinct genus of cartilaginous fish from the Permian to Paleocene periods.Johnson, G., 1981. Hybondontoidei (Chondrichthyes) from the Witchita- Albany Group ( Early Permian) of Texas. Journal of Vertebrate Paleontology. 1:1.Fossils (Smithsonian Handbooks) by David Ward (Page 199) ''Acrodus anningiae'' was named by Louis Agassiz in honor of the pioneering English paleontologist Mary Anning Mary Anning (21 May 1799 – 9 March 1847) was an English fossil collector, dealer, and palaeontologist who became known around the world for the discoveries she made in Jurassic marine fossil beds in the cliffs along the English Channel .... Species *''Acrodus acuminatus'' *''Acrodus acutus'' *''Acrodus alexandrae'' *''Acrodus alpinus'' *''Acrodus anningiae'' *''Acrodus angustissimus'' *''Acrodus braunii'' *''Acrodus (Acronemus) bicarenatus *''Acrodus cuneocostatus'' *''Acrodus dolloi'' *''Acrodus fal ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Mawsonia (fish)
''Mawsonia'' is an extinct genus of prehistoric coelacanth fish. It is the amongst the largest of all coelacanths, with one quadrate specimen (DGM 1.048-P) possibly belonging to an individual measuring in length. It lived in freshwater and brackish environments from the latest Jurassic to the mid-Cretaceous ( Tithonian to Cenomanian stages, about 152 to 96 million years ago) of South America, eastern North America, and Africa. ''Mawsonia'' was first described by British paleontologist Arthur Smith Woodward in 1907.''Mawsonia'' at Fossilworks.org Description [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
