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Arkacrinus

Crinoidea

Taxonomy
Arkacrinus was named by Knapp (1969) [Sepkoski's age data: C Bash-u]. It is not extant.

It was assigned to Arkacrinidae by Moore and Strimple (1973); to Cladida by Sepkoski (2002); and to Articuliformes by Wright (2017).

Synonymy list
YearName and author
1969Arkacrinus Knapp p. 357
1973Arkacrinus Moore and Strimple
2002Arkacrinus Sepkoski
2017Arkacrinus Wright

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RankNameAuthor
kingdomAnimalia()
—Bilateria
—EubilateriaAx 1987
—Deuterostomia
—Ambulacraria
phylumEchinodermata
subphylumBlastozoa
RankNameAuthor
classCrinoideaMiller 1821
subclassPentacrinoideaJaekel 1918
infraclassInadunata(Wachsmuth and Springer 1897)
—Cladida(Moore and Laudon 1943)
—Eucladida
—ArticuliformesWright 2017
genusArkacrinusKnapp 1969

If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.

G. †Arkacrinus Knapp 1969
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†Arkacrinus constrictus Moore and Strimple 1973
†Arkacrinus dubius Mather 1915
Diagnosis
No diagnoses are available
Measurements
No measurements are available
Composition: high Mg calcitec
Ontogeny: accretion, addition of partsp
Environment: marinep
Locomotion: stationarysubc
Attached: yessubc
Life habit: intermediate-level epifaunalsubc
Diet: suspension feedersubc
Vision: blindc
Dispersal: waterp
Dispersal 2: planktonicp
Created: 2009-10-09 11:50:31
Modified: 2009-10-09 18:50:31
Source: subc = subclass, c = class, p = phylum
References: Kiessling 2004, Aberhan 1992, Hendy et al. 2009

Age range: base of the Serpukhovian to the top of the Morrowan or 330.30000 to 318.60000 Ma

Collections (15 total)


Time interval Ma Country or state Original ID and collection number
Serpukhovian330.3 - 323.4USA (Oklahoma) Delocrinus dubius (5611)
Morrowan323.4 - 318.6USA (Arkansas) A. dubius (128913 128914 128978 128979 128985 128992) Delocrinus dubius (90789 90790 90794)
Morrowan323.4 - 318.6USA (Oklahoma) A. dubius (128679 128688) A. dubius, A. constrictus (128647) A. dubius, Delocrinus dubius (90795) Delocrinus dubius (90796)