Agelacrinitidae
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Agelacrinitidae
Agelacrinitidae is an extinct family of prehistoric echinoderms in the class Edrioasteroidea Edrioasteroidea is an extinct class of echinoderms. The living animal would have resembled a pentamerously symmetrical disc or cushion. They were obligate encrusters and attached themselves to inorganic or biologic hard substrates (frequently har .... References * Spiraclavus nacoensis, a new species of clavate agelacrinitid edrioasteroid from central Arizona. CD Sumrall, Journal of Paleontology, 1992 Agelacrinitidaeat fossilworks Edrioasteroidea Prehistoric echinoderm families {{paleo-echinoderm-stub ...
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Lepidodiscus (echinoderm)
''Lepidodiscus'' is an extinct genus of prehistoric echinoderms in the class Edrioasteroidea Edrioasteroidea is an extinct class of echinoderms. The living animal would have resembled a pentamerously symmetrical disc or cushion. They were obligate encrusters and attached themselves to inorganic or biologic hard substrates (frequently har .... References ''Lepidodiscus''at fossilworks Edrioasteroidea Prehistoric Crinozoa genera {{paleo-echinoderm-stub ...
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Isorophida
Isorophida (the isorophids) is an extinct order of prehistoric echinoderms in the class Edrioasteroidea Edrioasteroidea is an extinct class of echinoderms. The living animal would have resembled a pentamerously symmetrical disc or cushion. They were obligate encrusters and attached themselves to inorganic or biologic hard substrates (frequently har .... References Isorophidaat fossilworks Edrioasteroidea Prehistoric animal orders Echinoderm orders {{paleo-echinoderm-stub ...
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Animal
Animals are multicellular, eukaryotic organisms in the Kingdom (biology), biological kingdom Animalia. With few exceptions, animals Heterotroph, consume organic material, Cellular respiration#Aerobic respiration, breathe oxygen, are Motility, able to move, can Sexual reproduction, reproduce sexually, and go through an ontogenetic stage in which their body consists of a hollow sphere of Cell (biology), cells, the blastula, during Embryogenesis, embryonic development. Over 1.5 million Extant taxon, living animal species have been Species description, described—of which around 1 million are Insecta, insects—but it has been estimated there are over 7 million animal species in total. Animals range in length from to . They have Ecology, complex interactions with each other and their environments, forming intricate food webs. The scientific study of animals is known as zoology. Most living animal species are in Bilateria, a clade whose members have a Symmetry in biology#Bilate ...
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Isorophus
''Isorophus'' is an extinct genus of Echinoderm belonging to the class Edrioasteroidea. It is commonly found in deposits dating to the Ordovician period. There are several species, with one (''Isorophus cincinnatiensis'') being the official fossil of the city of Cincinnati Cincinnati ( ) is a city in the U.S. state of Ohio and the county seat of Hamilton County. Settled in 1788, the city is located at the northern side of the confluence of the Licking and Ohio rivers, the latter of which marks the state line wit ... in the US state of Ohio. References Edrioasteroidea Prehistoric echinoderm genera Ordovician echinoderms Paleozoic echinoderms of North America {{Paleo-echinoderm-stub ...
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Echinoderm
An echinoderm () is any member of the phylum Echinodermata (). The adults are recognisable by their (usually five-point) radial symmetry, and include starfish, brittle stars, sea urchins, sand dollars, and sea cucumbers, as well as the sea lilies or "stone lilies". Adult echinoderms are found on the sea bed at every ocean depth, from the intertidal zone to the abyssal zone. The phylum contains about 7,000 living species, making it the second-largest grouping of deuterostomes, after the chordates. Echinoderms are the largest entirely marine phylum. The first definitive echinoderms appeared near the start of the Cambrian. The echinoderms are important both ecologically and geologically. Ecologically, there are few other groupings so abundant in the biotic desert of the deep sea, as well as shallower oceans. Most echinoderms are able to reproduce asexually and regenerate tissue, organs, and limbs; in some cases, they can undergo complete regeneration from a single limb. ...
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