''Iocrinus'' is an extinct
genus
Genus ( plural genera ) is a taxonomic rank used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In the hierarchy of biological classification, genus com ...
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
England is a country that is part of the United Kingdom. It shares land borders with Wales to its west and Scotland to its north. The Irish Sea lies northwest and the Celtic Sea to the southwest. It is separated from continental Europe b ...
, and
Gilwern Hill, Powys in
Wales
Wales ( cy, Cymru ) is a Countries of the United Kingdom, country that is part of the United Kingdom. It is bordered by England to the Wales–England border, east, the Irish Sea to the north and west, the Celtic Sea to the south west and the ...
.
Selected species
* ''
Iocrinus brithdirensis''
* ''
Iocrinus crassus''
* ''
Iocrinus pauli''
* ''
Iocrinus shelvensis''
* ''
Iocrinus similis''
* ''
Iocrinus subcrassus''
* ''
Iocrinus trentonensis''
* ''
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