Cratostracus? cheni, a new conchostracan species from the Yixian Formation in western Liaoning, north-east China, and its age implications

The conchostracan genus Cratostracus was described from the Cenomanian Qingshankou Formation that crops out in the Jilin and Heilongjiang provinces of China, and species attributable to it have been found to range down into the Guantou Formation in Zhejiang Province, which has been dated as Aptian....

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Bibliographic Details
Published inCretaceous research Vol. 25; no. 4; pp. 577 - 584
Main Authors Li, Gang, Batten, D.J.
Format Journal Article
LanguageEnglish
Published Elsevier Ltd 01.08.2004
Subjects
China
Conchostraca
Early Cretaceous
Western Liaoning
Yixian Formation
Early Cretaceous
Conchostraca
Western Liaoning
China
Yixian Formation
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Summary:The conchostracan genus Cratostracus was described from the Cenomanian Qingshankou Formation that crops out in the Jilin and Heilongjiang provinces of China, and species attributable to it have been found to range down into the Guantou Formation in Zhejiang Province, which has been dated as Aptian. Representatives of the genus have not been found previously in older rocks. The species described in this paper as Cratostracus? cheni sp. nov. was recovered from two sections of the Yixian Formation in western Liaoning Province. Although only tentatively attributed to Cratostracus, its occurrence is consistent with an Early Cretaceous rather than a Late Jurassic age for the formation.
ISSN:0195-6671
1095-998X
DOI:10.1016/j.cretres.2004.05.005