''Chenops'' is an extinct

genus Genus ( plural genera ) is a taxonomic rank used in the biological classification of living and fossil organisms as well as viruses. In the hierarchy of biological classification, genus comes above species and below family. In binomial n ...

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 sinc ...

n which existed in the

Yixian Formation The Yixian Formation (; formerly transcribed as Yihsien Formation) is a geological formation in Jinzhou, Liaoning, People's Republic of China, that spans the late Barremian and early Aptian stages of the Early Cretaceous. It is known for its ...

, Inner Mongolia, and the Jehol fauna of China during the early

Cretaceous The Cretaceous ( ) is a geological period that lasted from about 145 to 66 million years ago (Mya). It is the third and final period of the Mesozoic Era, as well as the longest. At around 79 million years, it is the longest geological period of ...

period (

Barremian The Barremian is an age in the geologic timescale (or a chronostratigraphic stage) between 129.4 ± 1.5 Ma ( million years ago) and 121.4 ± 1.0 Ma). It is a subdivision of the Early Cretaceous Epoch (or Lower Cretaceous Series). It is pre ...

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

2010 File:2010 Events Collage New.png, From top left, clockwise: The 2010 Chile earthquake was one of the strongest recorded in history; The Eruption of Eyjafjallajökull in Iceland disrupts air travel in Europe; A scene from the opening ceremony of ...

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 {{Cretaceous-animal-stub

See also

References