Superregnum: Eukaryota
Cladus: Unikonta
Cladus: Opisthokonta
Cladus: Holozoa
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Superphylum: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Megaclassis: Osteichthyes
Superclassis/Classis: Actinopterygii
Classis/Subclassis: Actinopteri
Subclassis/Infraclassis: Neopterygii
Infraclassis: Teleostei
Megacohors: Osteoglossocephalai
Supercohors: Clupeocephala
Cohors: Euteleosteomorpha
Subcohors/Superordo: Protacanthopterygii
Ordo: Salmoniformes
Familia: Salmonidae
Subfamilia: Coregoninae
Genus: Coregonus
Species: Coregonus fera
Name
Coregonus fera Jurine, 1825
Primary references
IUCN: Coregonus fera (Extinct)
Coregonus fera in FishBase,
Froese, R. & Pauly, D. (eds.) 2024. FishBase. World Wide Web electronic publication, www.fishbase.org, version 02/2024.
Jurine, L., 1825. Histoire abrégée des poissons du lac Léman. Mémoires de la Société de Physique et d'Histoire Naturelle de Genève v. 3 (pt 1): 133–235, Pls. 1-15.
Vernacular names
العربية: كورجون وحشي
Deutsch: Féra
français: Féra du Léman
中文: 萊芒湖白鮭
Coregonus fera, commonly called the true fera, is a presumed extinct freshwater fish from Lake Geneva in Switzerland and France.
Description
Illustration from 1909
The fera is a freshwater whitefish that typically grows to between 35 and 40 centimeters in length.[1] It is a member of the common whitefish complex (Coregonus lavaretus sensu lato).
The identity of the fera is disputed. In 1950, Emile Dottrens described Coregonus fera as native to both Lake Geneva and Lake Constance. The coregonines from Lake Constance were named Sandfelchen. In 1997, Maurice Kottelat made a revision and used the name Coregonus fera for the Geneva fera and Coregonus arenicolus for theSandfelchen. The common name fera is still also used for fish that continue to live in Lake Geneva, but it now refers to the introduced Coregonus palaea.[2]
Biology
The true fera lived at the bottom of lakes, where it fed on zooplankton and spawned between February and mid-March.
Extinction
Together with the similarly extinct gravenche (Coregonus hiemalis), the fera was one of the most caught freshwater fishes in Lake Geneva. In 1890, these two fishes constituted 68% of the total captures in the lake.[1] Due to a combination of overexploitation and heavy hybridisation with introduced Coregonus species, it became extremely scarce and was last seen in Lake Geneva in 1920.[2][1]
References
Christian Trépey: Corégone (Féra - Palée) www.plongee-passion.ch (in French)
Maurice Kottelat & Jörg Freyhof (2008) Coregonus fera. The IUCN Red List of Threatened Species v. 2015-4
Maurice Kottelat: European Freshwater Fishes. An heuristic checklist of the freshwater fishes of Europe (exclusive of former USSR), with an introduction for non-systematists and comments on nomenclature and conservation; Biologia: Section Zoology vol. 52/5, Slovak Academic Press, Bratislava 1997, ISBN 80-85665-87-5
Froese, Rainer; Pauly, Daniel (eds.) (2010). "Coregonus fera" in FishBase. February 2010 version.
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