Clarkina

Clarkina; Temporal range: Permian PreꞒ Ꞓ O S D C P T J K Pg N
Scientific classification
Kingdom:	Animalia
Phylum:	Chordata
Class:	†Conodonta
Order:	†Ozarkodinida
Family:	†Gondolellidae
Genus:	†Clarkina; Kozur 1990
Species
	†Clarkina changxingensis; †Clarkina crofti Kozur & Lucas; †Clarkina deflecta; †Clarkina leveni; †Clarkina orientalis; †Clarkina postbitteri †Clarkina postbitteri hongshuiensis; †Clarkina postbitteri postbitteri; ; †Clarkina wangi; †Clarkina subcarinata;
Synonyms
	?Neogondolella

Clarkina is an extinct genus of conodonts. It is considered to be an offshore, outer shelf or basinal, deep-water taxon.^[4]

The genus name is a tribute to David Leigh Clark.

Synonyms

Clarkina Soodan 1975 is a junior synonym for the prehistoric sea cucumber Soodanella Huddleston 1982 in the family Priscopedatidae.

Clarkina Jordan & Evermann, 1927 is a junior synonym for the cyprinid fish genus Mylocheilus Agassiz, 1855.

Use in stratigraphy

The top of the Capitanian (or the base of the Wuchiapingian) is defined as the place in the stratigraphic record where the conodont subspecies Clarkina postbitteri postbitteri first appears.

The top of the Wuchiapingian (or the base of the Changhsingian) is defined as the place in the stratigraphic record where the conodont species Clarkina wangi first appears. The global reference section is profile D at Meishan, in the type area in Changxing.

References

^ Age and paleoecology of the conodont Clarkina changxingensis (Wang & Wang). Heinz Kozur, January 1992
^ Kozur, Cour Forschungsinst Senckenb, 1990, volume 117, page 414
^ Guadalupian (Middle Permian) Conodonts of Sponge-Bearing Limestones from the Margins of the Delaware Basin, West Texas. Kozur H. and Mostler H., Geologia Croatica, 1995, 48(2), pages 107-128 (abstract, retrieved 08 June 2016)
^ ^a ^b Palaeoecology of the conodonts Hindeodus and Clarkina during the Permian–Triassic transitional period. Xulong Lai, Paul Wignall and Kexin Zhang, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 171, Issues 1–2, 1 July 2001, Pages 63–72, doi:10.1016/S0031-0182(01)00269-3

External links

"Clarkina" at the Encyclopedia of Life
"Clarkina". Paleobiology Database. Retrieved 8 June 2016.

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[1] Age and paleoecology of the conodont Clarkina changxingensis (Wang & Wang). Heinz Kozur, January 1992

[2] Kozur, Cour Forschungsinst Senckenb, 1990, volume 117, page 414

[3] Guadalupian (Middle Permian) Conodonts of Sponge-Bearing Limestones from the Margins of the Delaware Basin, West Texas. Kozur H. and Mostler H., Geologia Croatica, 1995, 48(2), pages 107-128 (abstract, retrieved 08 June 2016)

[Lai-4] Palaeoecology of the conodonts Hindeodus and Clarkina during the Permian–Triassic transitional period. Xulong Lai, Paul Wignall and Kexin Zhang, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 171, Issues 1–2, 1 July 2001, Pages 63–72, doi:10.1016/S0031-0182(01)00269-3

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