Gymnocephalus
Encyclopedia
Gymnocephalus is a ray-finned fish genus
of the perch family
(Percidae
). Its members live in western Eurasia
. They are collectively called ruffes and resemble the common perch
es (Perca), but are usually smaller and have a different pattern.
It contains the following species
:
Genus
In biology, a genus is a low-level taxonomic rank used in the biological classification of living and fossil organisms, which is an example of definition by genus and differentia...
of the perch family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
(Percidae
Percidae
The Percidae are a family of perciform fish found in fresh and brackish waters of the Northern Hemisphere. The family contains about 200 species in ten genera...
). Its members live in western Eurasia
Eurasia
Eurasia is a continent or supercontinent comprising the traditional continents of Europe and Asia ; covering about 52,990,000 km2 or about 10.6% of the Earth's surface located primarily in the eastern and northern hemispheres...
. They are collectively called ruffes and resemble the common perch
Perch
Perch is a common name for fish of the genus Perca, freshwater gamefish belonging to the family Percidae. The perch, of which there are three species in different geographical areas, lend their name to a large order of vertebrates: the Perciformes, from the Greek perke meaning spotted, and the...
es (Perca), but are usually smaller and have a different pattern.
It contains the following species
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
:
- Gymnocephalus acerinaGymnocephalus acerinaGymnocephalus acerina is a species of fish in the Percidae family. It is found in Belarus, Hungary, Moldova, Poland, Russia, Slovakia, and Ukraine.-Source:* World Conservation Monitoring Centre 1996. . Downloaded on 4 August 2007....
– Donets Ruffe - Gymnocephalus ambriaelacus Geiger & Schliewen, 2010 – AmmerseeAmmerseeAmmersee is a lake in Upper Bavaria, Germany located southwest of Munich between the towns of Herrsching and Dießen am Ammersee. With a surface area of approximately , it is the sixth largest lake in Germany. The lake is located at an elevation of , and has a maximum depth of . Like other Bavarian...
Ruffe - Gymnocephalus baloni – Balon's Ruffe, Danube Ruffe
- Gymnocephalus cernuus – (Eurasian) Ruffe
- Gymnocephalus schraetzer – Schraetzer