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Holasteridae
Holasteridae is an extinct family of sea urchins. These semi-infaunal detritivores lived during the Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of th ... period, from 140.2 to 53.0 Ma. Genera References Holasteroida {{paleo-echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Hemipneustes
''Hemipneustes'' is an extinct genus of sea urchins belonging to the family Holasteridae. These semi-infaunal detritivores lived during the Upper Cretaceous period, from 70.6 to 66.043 million years ago. Fossils of this genus have been found in the sediments of Netherlands, Belgium, Bulgaria, India, Iran, the Netherlands, Oman and Spain. Description ''Hemipneustes'' is a quite large sea urchin Sea urchins () are spiny, globular echinoderms in the class Echinoidea. About 950 species of sea urchin live on the seabed of every ocean and inhabit every depth zone from the intertidal seashore down to . The spherical, hard shells (tests) of ... with a high-domed profile and a well-defined anterior sulcus. List of species * '' Hemipneustes africanus'' Deshayes In Agassiz & Desor, 1847 * '' Hemipneustes arabicus'' Ali, 1989 †* '' Hemipneustes arnaudi'' Cotteau, 1892 * '' Hemipneustes compressus'' Noetling, 1897 †* '' Hemipneustes cotteaui'' Lambert in Peron, 1887 †* '' Hemi ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Echinocorys
''Echinocorys'' is an extinct genus of echinoids that lived from the Late Cretaceous to the Paleocene. The genus belongs to the Holasteridae family. Its remains have been found in Asia, Europe, Australia (Oceania) and North America. Sources * ''Fossils'' (Smithsonian Handbooks) by David Ward (Page 182) External links''Echinocorys'' in the Paleobiology Database Holasteroida Prehistoric echinoid genera Cretaceous echinoderms Paleocene echinoderms Prehistoric echinoderms of Asia Prehistoric echinoderms of Europe Prehistoric echinoderms of North America Late Cretaceous genus first appearances Paleocene genus extinctions {{paleo-echinoidea-stub ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |
Holasteroida
Holasteroida is an order of irregular sea urchins. Characteristics These irregular sea urchins are characterized by a particularly marked bilateral symmetry, including for the apical system, which is highly elongated. In some contemporary abyssal groups such as Pourtalesiidae, some species are even bottle-shaped. The mouth (peristome) does not contain an Aristotle's lantern. The anus (periproct) has migrated towards the periphery of the test. The plastron is never amphisternous. Image:MHNT - Hemipneustes pyrenaicus - 1.jpg, Fossile of '' Hemipneustes pyrenaicus'' ( Hemipneustidae, Maastrichtian) Image:Echinosigra amphora.jpg, '' Echinosigra amphora'' ( Pourtalesiidae) This order seems to have appeared at the lower Cretaceous. List of families According to World Register of Marine Species : * Family Hemipneustidae (Lambert, 1917) †** genus '' Hemipneustes'' L. Agassiz, 1835 †** genus '' Medjesia'' Jeffery, 1997 †** genus '' Opisopneustes'' Gauthier, 1889 †... [...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 worth mentioning 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 ''Compsognathu ... [...More Info...] [...Related Items...] OR: [Wikipedia] [Google] [Baidu] |