| 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 records of the Carboniferous period of United States and Canada (age range: 353.8 to 345.0 million years ago). [2]
Crinoids are marine animals that make up the class Crinoidea, one of the classes of the phylum Echinodermata, which also includes the starfish, brittle stars, sea urchins and sea cucumbers. Those crinoids which, in their adult form, are attached to the sea bottom by a stalk are commonly called sea lilies, while the unstalked forms are called feather stars or comatulids, being members of the largest crinoid order, Comatulida.
The Campanian is the fifth of six ages of the Late Cretaceous Epoch on the geologic timescale of the International Commission on Stratigraphy (ICS). In chronostratigraphy, it is the fifth of six stages in the Upper Cretaceous Series. Campanian spans the time from 83.6 to 72.1 million years ago. It is preceded by the Santonian and it is followed by the Maastrichtian.
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.
Aacocrinus is a genus of extinct sea lily from the Actinocrinitidae family. It has been shown that it was an attached stationary organism that blindly fed on passing organism. It was composed of Mg calcite and its habitat included the upper-level epifauna.
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 all the way 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, the mushroom crinoid, is a species of extinct crinoid, known only from its fossils, which are found in the U.S. states of Indiana, Tennessee and Kentucky. They date back to the Lower Mississippian, about 345 million years ago.
The Edwardsville Formation is a geological structure in the Borden Group, of the Lower Mississippian sub system,. Crinoids fossils can be found in the formation.
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.
Promachocrinus is a genus of free-swimming, stemless crinoids. It is a monotypic genus, and the only species in the genus is Promachocrinus kerguelensis. This is a coldwater crinoid which is found in the seas around Antarctica and surrounding island groups, including under the sea ice.
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