Mioplosus

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Mioplosus
Fossil of Mioplosus labracoides in the Museum of Natural History in Berlin

Fossil of Mioplosus labracoides in the Museum of Natural History in Berlin

Temporal occurrence
Lower Eocene
55.8 to 50.3 million years
Locations
Systematics
Neoteleostei
Acanthomorphata
Spinefish (Acanthopterygii)
Perch relatives (Percomorphaceae)
incertae sedis
Mioplosus
Scientific name
Mioplosus
Cope , 1877

Mioplosus was abony fish from the group of perch relatives (Percomorphaceae) thatlived around 50 million years ago in the Eocene . It was firstdescribedby Edward Drinker Cope in1877. Fossils of the genus have been found in the Green River Formation in Wyoming . Mioplosus was a freshwater fish and lived in lakes and streams.

features

Mioplosus was about 30 centimeters long and had a spindle-shaped, much slimmer body than the perch genus Priscacara from the same formation . The spiny and soft-rayed part of the dorsal fin were separated from each other, whereby the soft-rayed second dorsal fin had almost the same, triangular shape as the anal fin and was symmetrically opposite. The anal fin had two spiked rays. The caudal fin was fan-shaped. On the vomer had mioplosus V-shaped teeth arranged.

A distinction is made between two species, the type species Mioplosus labracoides Cope, 1877 and Mioplosus sauvagenus Cope, 1877

Systematics

Mioplosus was first described by Cope as a supposed relative of Morone saxatilis from the sea ​​bass family (Moronidae), then assigned to the real perch (Percidae) and later placed in the family of cod perch (Percidae) , a family of perch that is no longer found in North America today . A study from 2010 came to the result that Mioplosus is basal to a clade of Lateolabrax , Siniperca and Lates , three perch genera which, following modern molecular biological studies, are not closely related, so that the systematic position of Mioplosus continues is unclear.

literature

  • Karl Albert Frickhinger: Fossils Atlas Fish , Mergus-Verlag, Melle, 1999, ISBN 3-88244-018-X

Individual evidence

  1. ↑ John A. Whitlock, 2010. Phylogenetic relationships of the Eocene percomorph fishes Priscacara and Mioplosus. Journal of Vertebrate Paleontology 30 (4): 1037-1048, July 2010 by the Society of Vertebrate Paleontology. doi: 10.1080 / 02724634.2010.483534
  2. ↑ Ricardo Betancur-R, Edward O. Wiley, Gloria Arratia, Arturo Acero, Nicolas Bailly, Masaki Miya, Guillaume Lecointre and Guillermo Ortí: Phylogenetic classification of bony fishes . BMC Evolutionary Biology, BMC series - July 2017, DOI: 10.1186 / s12862-017-0958-3

Web links

Commons : Mioplosus  - collection of images, videos and audio files