''Clarkina'' is an extinct genus of
conodonts. It is considered to be an offshore, outer shelf or basinal, deep-water taxon.
[
The genus name is a tribute to ]David Leigh Clark
David L. Clark is a paleontologist. He was the W.H. Twenhofel Professor of Geology and Geophysics at the University of Wisconsin–Madison, Madison, Wisconsin.
In 1972, he described the conodont genus '' Neostreptognathodus''.
Awards and ...
.
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
In the geologic timescale, the Wuchiapingian or Wujiapingian (from in the Liangshan area of Hanzhong, Shaanxi Province) is an age or stage of the Permian. It is also the lower or earlier of two subdivisions of the Lopingian Epoch or Series. T ...
) is defined as the place in the stratigraphic record where the conodont subspecies ''Clarkina postbitteri postbitteri'' first appears.
The top of the Wuchiapingian
In the geologic timescale, the Wuchiapingian or Wujiapingian (from in the Liangshan area of Hanzhong, Shaanxi Province) is an age or stage of the Permian. It is also the lower or earlier of two subdivisions of the Lopingian Epoch or Series. T ...
(or the base of the Changhsingian
In the geologic time scale, the Changhsingian or Changxingian is the latest age or uppermost stage of the Permian. It is also the upper or latest of two subdivisions of the Lopingian Epoch or Series. The Changhsingian lasted from to 251.902 ...
) 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
External links
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Ozarkodinida genera
Permian conodonts
{{conodont-stub