''Delocrinus'' is a
genus of
extinct
Extinction is the termination of a kind of organism or of a group of kinds (taxon), usually a species. The moment of extinction is generally considered to be the death of the last individual of the species, although the capacity to breed and ...
crinoids, belonging to the family
Catacrinidae. Specimens have been found in
Kansas,
Missouri,
Nebraska,
Nevada,
Oklahoma
Oklahoma (; Choctaw language, Choctaw: ; chr, ᎣᎧᎳᎰᎹ, ''Okalahoma'' ) is a U.S. state, state in the South Central United States, South Central region of the United States, bordered by Texas on the south and west, Kansas on the nor ...
,
Arizona,
Iowa,
Texas,
Utah and
Virginia.
''Eperisocrinus missouriensis'', formerly ''delocrinus missouriensis'', was made the state fossil of
Missouri in 1989.
Description
Like
extant
Extant is the opposite of the word extinct. It may refer to:
* Extant hereditary titles
* Extant literature, surviving literature, such as ''Beowulf'', the oldest extant manuscript written in English
* Extant taxon, a taxon which is not extinct, ...
crinoids, ''Delocrinus'' species was anchored to a hard surface by a
holdfast out of which grew an articulated stalk. On top of this was a
calyx
Calyx or calyce (plural "calyces"), from the Latin ''calix'' which itself comes from the Ancient Greek ''κάλυξ'' (''kálux'') meaning "husk" or "pod", may refer to:
Biology
* Calyx (anatomy), collective name for several cup-like structures ...
with a number of feather-like arms. Each arm bore short branches known as
pinnules and from these
cirri
Giovanni Battista Cirri (1 October 1724 – 11 June 1808) was an Italian cellist and composer in the 18th century.
Biography
Cirri was born in Forlì in the Emilia-Romagna Region of Italy. He had his first musical training with his brother ...
were extended which sifted
plankton from the water flowing past.
References
{{Taxonbar, from=Q56479419
Paleozoic echinoderms of North America
Crinoid genera
Permian crinoids
Carboniferous crinoids
Symbols of Missouri