Acanthochirana
Encyclopedia
Acanthochirana is an extinct genus of prawn
that existed during the upper Jurassic
period. It was named by Strand in 1928, and contains five species, including Acanthochirana cordata. They are distinguished from the related genus Aeger
by the presence of teeth on the rostrum
, which are absent in Aeger.
Prawn
Prawns are decapod crustaceans of the sub-order Dendrobranchiata. There are 540 extant species, in seven families, and a fossil record extending back to the Devonian...
that existed during the upper Jurassic
Jurassic
The Jurassic is a geologic period and system that extends from about Mya to Mya, that is, from the end of the Triassic to the beginning of the Cretaceous. The Jurassic constitutes the middle period of the Mesozoic era, also known as the age of reptiles. The start of the period is marked by...
period. It was named by Strand in 1928, and contains five species, including Acanthochirana cordata. They are distinguished from the related genus Aeger
Aeger
Aeger is a genus of fossil prawns. They first occur in the Middle Triassic, and died out at the end of the Late Cretaceous. A total of 20 species are known....
by the presence of teeth on the rostrum
Rostrum (anatomy)
The term rostrum is used for a number of unrelated structures in different groups of animals:*In crustaceans, the rostrum is the forward extension of the carapace in front of the eyes....
, which are absent in Aeger.
External links
- Acanthochirana at the Paleobiology DatabasePaleobiology Database' is an online resource for information on the distribution and classification of fossil animals, plants, and microorganisms.-History:The Paleobiology Database was founded in 2000. It has been funded by the National Science Foundation and the Australian Research Council...