| Abrotocrinus Temporal range: Early Carboniferous, | |
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| Fossil of Abrotocrinus from Carboniferous of United States | |
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| Genus: | Abrotocrinus Miller and Gurley, 1890 [1] |
| Abrotocrinus Temporal range: Early Carboniferous, | |
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| | |
| Fossil of Abrotocrinus from Carboniferous of United States | |
| Scientific classification | |
| Kingdom: | |
| Phylum: | |
| Subphylum: | |
| Class: | |
| Subclass: | |
| Order: | |
| Genus: | Abrotocrinus Miller and Gurley, 1890 [1] |
This genus is known in the fossil record of the Carboniferous period of United States and Canada (age range: 353.8 to 345.0 million years ago). [2]
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 9,000 metres (30,000 ft).
Actinocrinites is an extinct genus of crinoids.
Cyproideidae is a family of amphipod crustaceans. Eighteen genera and 43 species have been described as of 2009. They mostly occur mostly in the Southern Hemisphere, where they form associations with corals, sponges, crinoids and hydroids.
Iocrinus is an extinct genus of crinoid. It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Brachypus may refer to:
Paleontology in Indiana refers to paleontological research occurring within or conducted by people from the U.S. state of Indiana. Indiana's fossil record stretches back to the Precambrian, when the state was inhabited by microbes. More complex organisms came to inhabit the state during the early Paleozoic era. At that time the state was covered by a warm shallow sea that would come to be inhabited by creatures like brachiopods, bryozoans, cephalopods, crinoids, and trilobites. During the Silurian period the state was home to significant reef systems. Indiana became a more terrestrial environment during the Carboniferous, as an expansive river system formed richly vegetated deltas where amphibians lived. There is a gap in the local rock record from the Permian through the Mesozoic. Likewise, little is known about the early to middle Cenozoic era. During the Ice Age however, the state was subject to glacial activity, and home to creatures like short-faced bears, camels, mammoths, and mastodons. After humans came to inhabit the state, Native Americans interpreted the fossil proboscidean remains preserved near Devil's Lake as the bones of water monsters. After the advent of formal scientific investigation one paleontological survey determined that the state was home to nearly 150 different kinds of prehistoric plants.
Agaricocrinus americanus, also known as the mushroom crinoid or American crinoid, is a species of extinct crinoid. Its fossils can be found in the U.S. states of Indiana, Tennessee and Kentucky. They date back to the Lower Mississippian, about 345 million years ago.
Goodingia capillastericola is a species of sea snail, a marine gastropod mollusk in the family Eulimidae. This species, along with Goodingia varicosa belongs in the genus Goodingia and are crinoid-parasitic.
Petalocrinidae is an extinct family of cladid crinoids from the Early Ordovician to Lower Devonian. Fossils of petalocrinoids have been found in China, Europe and the United States.
Eretmocrinus is an extinct genus of crinoids.
Cydrocrinus is an extinct genus of crinoids.
Onychocrinus is an extinct genus of crinoids.
Taxocrinus is an extinct genus of crinoids.
Scytalocrinus is an extinct genus of crinoids.
Ulrichicrinus is an extinct genus of crinoids.
Comatulidae is a family of comatulid crinoids. Since 2015, it replaces the family Comasteridae.
Cicerocrinus is an extinct genus of crinoids in the family Pisocrinidae. It is known from the Silurian of the United Kingdom. The type locality for C. elegans is Old Bridge near Ludlow.
Flexibilia is a superorder of specialized Paleozoic crinoids. They exhibited a conserved body plan and consistent suite of characteristics throughout their long history. Previously considered a subclass with unclear affinities, later investigation determined that flexibles are well-nested within Cladida, a broad group ancestral to living articulate crinoids. The Ordovician cladid Cupulocrinus acts as an intermediate form linking the generalized anatomy of other early cladids with the distinctive anatomy of flexibles, and several studies have considered it to be ancestral to the rest of the group. Although flexibles never reached the same abundance or diversity as many other crinoid groups, they remained a reliable component of crinoid faunas, particularly from the Silurian onwards. Flexible fossils are very rare in the Ordovician, but the Late Ordovician appears to have been an interval of rapid diversification for the group.
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