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Periechocrinus
''Periechocrinus'' is an extinct genus of crinoids belonging to the order Monobathrida, family Periechecrinidae.W.H.C. RamsbottomPeriechocrinus versus Periechocrinites- Annals and Magazine of Natural History: Series 12 Volume 7, Issue 81, 1954 These stationary upper-level epifaunal suspension feeders lived during the Carboniferous period and the Mississippian age of Australia, as well as in the Silurian The Silurian ( ) is a geologic period and system spanning 23.5 million years from the end of the Ordovician Period, at million years ago ( Mya), to the beginning of the Devonian Period, Mya. The Silurian is the third and shortest period of t ... of Canada, Czech Republic, United Kingdom and United States, from 436.0 to 345.3 Ma. Species *''Periechocrinus costatus'' (Austin and Austin) *''Periechocrinus indicator'' Etheridge Jr. 1892 Description ''Periechocrinus'' species were about high. References External links Museum of Victoria Monobathrida Extinct anim ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Monobathrida
Monobathrida is an extinct order of crinoids. Genera * Aacocrinus * Abacocrinus * Abactinocrinus * Abathocrinus * Abatocrinus * Abludoglyptocrinus * Acacocrinus * Actinocrinites * Actinocrinus * Acrocrinus * Agaricocrinus * Agathocrinus * Alisocrinus * Allocrinus * Alloprosallocrinus * Amarsupiocrinus * Amblacrinus * Amonohexacrinus * Amphoracrinus * Amphoracrocrinus * Ancalocrinus * Archaeocalyptocrinus * Arthroacantha * Aryballocrinus * Athabascacrinus * Azygocrinus * Barrandeocrinus * Batocrinus * Beyrichocrinus * Bikocrinus * Blairocrinus * Bogotacrinus * Bohemicocrinus * Bolicrinus * Boliviacrinus * Brahmacrinus * Briarocrinus * Cactocrinus * Calliocrinus * Camarocrinus * Canistrocrinus * Cantharocrinus * Carolicrinus * Carpocrinus * Caucacrocrinus * Celtocrinus * Centriocrinus * Cerasmocrinus * Chinacrinus * Clarkeocrinus * Clematocrinus * Clonocrinus * Closterocrinus * Coelocrinus * Comanthocrinus * Compsocrinina * ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Galerie De Paléontologie Et D'anatomie Comparée
The Gallery of Paleontology and Comparative Anatomy (in French, ''Galerie de Paléontologie et d'Anatomie comparée'') is a part of the French National Museum of Natural History (''Muséum national d'histoire naturelle'', MNHN). It is situated in the ''Jardin des plantes'' in Paris near the Gare d'Austerlitz. The Gallery of Comparative Anatomy (occupying the ground floor), holds nearly a thousand skeletons and interprets their organization and classification. The Gallery of Paleontology (occupying the first and second floor) presents a famous collection of fossil vertebrates, fossil invertebrates and fossil plants. Among the most appreciated pieces by the public is a series of dinosaur skeleton casts ('' Diplodocus'', ''Iguanodon'', ''Allosaurus'', ''Carnotaurus'', '' Tarbosaurus'', '' Unenlagia'', ''Dromaeosaurus'', ''Bambiraptor'') but also a ''Tyrannosaurus'' skull (cast of specimen AMNH 5027), an authentic skull of ''Triceratops'', an authentic ''Compsognathus'' skeleton, ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Animalia
Animals are multicellular, eukaryotic organisms in the Biology, biological Kingdom (biology), kingdom Animalia (). With few exceptions, animals heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, have myocytes and are motility, able to move, can reproduce sexually, and grow from a hollow sphere of Cell (biology), cells, the blastula, during embryonic development. Animals form a clade, meaning that they arose from a single common ancestor. Over 1.5 million extant taxon, living animal species have been species description, described, of which around 1.05 million are insects, over 85,000 are molluscs, and around 65,000 are vertebrates. It has been estimated there are as many as 7.77 million animal species on Earth. Animal body lengths range from to . They have complex ecologies and biological interaction, interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinodermata
An echinoderm () is any animal of the phylum Echinodermata (), which includes starfish, brittle stars, sea urchins, sand dollars and sea cucumbers, as well as the sessile sea lilies or "stone lilies". While bilaterally symmetrical as larvae, as adults echinoderms are recognisable by their usually five-pointed radial symmetry (pentamerous symmetry), and are found on the sea bed at every ocean depth from the intertidal zone to the abyssal zone. The phylum contains about 7,600 living species, making it the second-largest group of deuterostomes after the chordates, as well as the largest marine animal, marine-only phylum. The first definitive echinoderms appeared near the start of the Cambrian. Echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the deep sea, as well as continental shelf, shallower oceans. Most echinoderms are able to asexual reproduction, reproduce asexually and regeneration (biology), regenerat ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinozoa
Crinozoa is a subphylum of mostly sessile echinoderms, of which the crinoids, or sea lilies and feather stars, are the only extant members. Crinozoans have an extremely extensive fossil history. Classes within Crinozoa As published in the ''Treatise on Invertebrate Paleontology'', Crinozoa included all stemmed groups except for the few stemmed basal solutes. When Blastozoa was erected to contain stalked forms with brachioles rather than arms, only Crinoidea and Paracrinoidea remained within Crinozoa. Recent cladistic work has placed Paracrinoidea under Blastozoa, although some sources continue to include Paracrinoidea. One proposal for the cladistic placement of the Homalozoan classes groups Stylophora together with crinoids to form Crinozoa. A 2024 survey of recent research finds more support for Homalozoa as a paraphyletic assemblage along the echinoderm stem group, but noted that the position of Stylophora in particular was uncertain. If neither Paracrinoidea nor Stylo ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinoidea
Crinoids are marine invertebrates that make up the class Crinoidea. Crinoids that remain attached to the sea floor by a stalk in their adult form are commonly called sea lilies, while the unstalked forms, called feather stars or comatulids, are members of the largest crinoid order, Comatulida. Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths of over . Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have a short ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Camerata (crinoid)
The Camerata or camerate crinoids are an extinct subclass of Paleozoic stalked crinoids. They were some of the earliest crinoids to originate during the Early Ordovician, reached their maximum diversity during the Mississippian, and became extinct during the Permian–Triassic extinction event. Camerates are the sister group of Pentacrinoidea, which contains all other crinoids (including living species). The two largest camerate subgroups are the orders Diplobathrida and Monobathrida. Anatomically, they are distinguished by:Treatise on Invertebrate Paleontology, Volume T. Echinodermata: Crinoidea. Ubaghs et al. Editors: R. C. Moore and C. Teichert. 1978. *fused junctions between the plates of the cup *brachial plates incorporated into the cup *tegmen forming a rigid roof over the mouth *no less than ten and sometimes a very large number of free arms, often pinnulate Subdivisions * Order Cladida? * '' Adelphicrinus'' * '' Eknomocrinus'' * '' Cnemecrinus'' * '' Quechuacrin ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Extinct
Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and recover. As a species' potential Range (biology), range may be very large, determining this moment is difficult, and is usually done retrospectively. This difficulty leads to phenomena such as Lazarus taxon, Lazarus taxa, where a species presumed extinct abruptly "reappears" (typically in the Fossil, fossil record) after a period of apparent absence. Over five billion species are estimated to have died out. It is estimated that there are currently around 8.7 million species of eukaryotes globally, possibly many times more if microorganisms are included. Notable extinct animal species include Dinosaur, non-avian dinosaurs, Machairodontinae, saber-toothed cats, and mammoths. Through evolution, species arise through the process of specia ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Crinoid
Crinoids are marine invertebrates that make up the class Crinoidea. Crinoids that remain attached to the sea floor by a stalk in their adult form are commonly called sea lilies, while the unstalked forms, called feather stars or comatulids, are members of the largest crinoid order, Comatulida. Crinoids are echinoderms in the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. They live in both shallow water and in depths of over . Adult crinoids are characterised by having the mouth located on the upper surface. This is surrounded by feeding arms, and is linked to a U-shaped gut, with the anus being located on the oral disc near the mouth. Although the basic echinoderm pattern of fivefold symmetry can be recognised, in most crinoids the five arms are subdivided into ten or more. These have feathery pinnules and are spread wide to gather planktonic particles from the water. At some stage in their lives, most crinoids have a sho ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Carboniferous
The Carboniferous ( ) is a Geologic time scale, geologic period and System (stratigraphy), system of the Paleozoic era (geology), era that spans 60 million years, from the end of the Devonian Period Ma (million years ago) to the beginning of the Permian Period, Ma. It is the fifth and penultimate period of the Paleozoic era and the fifth period of the Phanerozoic eon (geology), eon. In North America, the Carboniferous is often treated as two separate geological periods, the earlier Mississippian (geology), Mississippian and the later Pennsylvanian (geology), Pennsylvanian. The name ''Carboniferous'' means "coal-bearing", from the Latin ("coal") and ("bear, carry"), and refers to the many coal beds formed globally during that time. The first of the modern "system" names, it was coined by geologists William Conybeare (geologist), William Conybeare and William Phillips (geologist), William Phillips in 1822, based on a study of the British rock succession. Carboniferous is the per ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
