''Iocrinus'' is an extinct
genus of
crinoid (sea lilies and feather stars). It is an early
form
Form is the shape, visual appearance, or configuration of an object. In a wider sense, the form is the way something happens.
Form also refers to:
*Form (document), a document (printed or electronic) with spaces in which to write or enter data
...
of crinoid, from the
Ordovician rock
Rock most often refers to:
* Rock (geology), a naturally occurring solid aggregate of minerals or mineraloids
* Rock music, a genre of popular music
Rock or Rocks may also refer to:
Places United Kingdom
* Rock, Caerphilly, a location in Wales ...
of
North America
North America is a continent in the Northern Hemisphere and almost entirely within the Western Hemisphere. It is bordered to the north by the Arctic Ocean, to the east by the Atlantic Ocean, to the southeast by South America and the Car ...
,
England, and
Gilwern Hill, Powys
Gilwern Hill is a hill about 3 mi / 5 km southeast of Llandrindod Wells in the county of Powys, Wales.
Geology
The hill is composed from a range of lower and middle Ordovician volcaniclastic rocks which form a part of the Builth I ...
in
Wales.
Selected species
* ''
Iocrinus brithdirensis
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* '' Iocrinus brithdirensis ...
''
* ''
Iocrinus crassus
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* ''Iocrinus brithdirensis' ...
''
* ''
Iocrinus pauli
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* ''Iocrinus brithdirensis' ...
''
* ''
Iocrinus shelvensis
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* ''Iocrinus brithdirensis' ...
''
* ''
Iocrinus similis
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* ''Iocrinus brithdirensis' ...
''
* ''
Iocrinus subcrassus
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* ''Iocrinus brithdirensis' ...
''
* ''
Iocrinus trentonensis
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early form of crinoid, from the Ordovician rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species
* ''Iocrinus brithdirensis' ...
''
* ''
Iocrinus whitteryi
''Iocrinus'' is an extinct genus of crinoid (sea lilies and feather stars). It is an early Form (zoology), form of crinoid, from the Ordovician Rock (geology), rock of North America, England, and Gilwern Hill, Powys in Wales.
Selected species ...
''
References
Paleobiology Database entry''Iocrinus'' in the Ordovician of England and Wales* Stuart M. Kelly, ''Functional Morphology and Evolution of Iocrinus: An Ordovician Disparid Inadunate Crinoid'', Indiana University, 1978.
Iocrinidae
Ordovician crinoids
Ordovician echinoderms of Europe
Ordovician echinoderms of North America
Paleozoic life of Ontario
Verulam Formation
{{Paleo-crinoidea-stub