''Chenops'' is an

extinct Extinction is the termination of an organism by the death of its Endling, last member. A taxon may become Functional extinction, functionally extinct before the death of its last member if it loses the capacity to Reproduction, reproduce and ...

genus Genus (; : genera ) is a taxonomic rank above species and below family (taxonomy), family as used in the biological classification of extant taxon, living and fossil organisms as well as Virus classification#ICTV classification, viruses. In bino ...

notostraca The order Notostraca, containing the single family Triopsidae, is a group of crustaceans known as tadpole shrimp or shield shrimp. The two genera, ''Triops'' and ''Lepidurus'', are considered living fossils, with similar forms having existed since ...

n which existed in the

Yixian Formation The Yixian Formation (; formerly Romanization of Chinese, transcribed as Yihsien Formation or Yixiang Formation) is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans the Barremian stage of the Early Cretaceous. I ...

, Inner Mongolia, and the Jehol fauna of

China China, officially the People's Republic of China (PRC), is a country in East Asia. With population of China, a population exceeding 1.4 billion, it is the list of countries by population (United Nations), second-most populous country after ...

during the early

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 143.1 to 66 mya (unit), million years ago (Mya). It is the third and final period of the Mesozoic Era (geology), Era, as well as the longest. At around 77.1 million years, it is the ...

period (

Barremian The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 125.77 Ma (million years ago) and 121.4 ± 1.0 Ma (Historically, this stage was placed at 129.4 million to approximately 125 million years ago) It is a ...

age). The genus was erected by Thomas A. Hegna and Ren Dong in

2010 The year saw a multitude of natural and environmental disasters such as the 2010 Haiti earthquake, the Deepwater Horizon oil spill, and the 2010 Chile earthquake. The 2009 swine flu pandemic, swine flu pandemic which began the previous year ...

to describe the Yixian species, ''Chenops yixianensis''. A second species, originally described as "''Prolepidurus oblongus''", from the Jehol fauna, was redescribed as ''C. oblongus''. As with the genus ''

Jeholops ''Jeholops'' is an extinct genus of notostracan which existed in the Yixian Formation, inner Mongolia, China during the early Cretaceous period (Barremian age). It was described by Thomas A. Hegna and Ren Dong in 2010, and the only species is '' ...

'', and unlike the modern genera ''Triops'' and ''Lepidurus'', ''Chenops'' lacked eyes.

References

Notostraca Branchiopoda genera Early Cretaceous crustaceans Fossil taxa described in 2010 Yixian fauna Prehistoric crustacean genera Early Cretaceous arthropods of Asia Barremian genera Crustaceans described in 2010 {{paleo-crustacean-stub

See also

References