Balaenidae

Cladus: Eukaryota
Supergroup: Opisthokonta
Regnum: Animalia
Subregnum: Eumetazoa
Cladus: Bilateria
Cladus: Nephrozoa
Cladus: Deuterostomia
Phylum: Chordata
Subphylum: Vertebrata
Infraphylum: Gnathostomata
Superclassis: Tetrapoda
Classis: Mammalia
Subclassis: Theria
Infraclassis: Placentalia
Superordo: Cetartiodactyla
Ordo: Cetacea
Subordo: Mysticeti
Familia: Balaenidae
Genera: Balaena - Eubalaena

Name

Balaenidae Gray, 1821

References

* Balaenidae on Mammal species of the World.
* Don E. Wilson & DeeAnn M. Reeder (editors). 2005. Mammal Species of the World : A Taxonomic and Geographic Reference, 2-volume set(3rd ed).
* Lond. Med. Repos. 15: 310.

Vernacular names
Internationalization
Dansk: Rethvaler
Deutsch: Glattwale
English: Right Whales
Esperanto: Vera Baleno
Español: Ballenas francas
Français: Eubalaena
עברית: בנליים
Hrvatski: Glatki kitovi
Magyar: Simabálnák
Italiano: Balena franca
Lietuvių: Glotnieji banginiai
Nederlands: Echte walvissen
Polski: Wale gładkoskóre
Português: Baleia franca
Svenska: Rätvalar
中文: 露脊鯨

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Balaenidae (pronounced /bəˈliːnɨdiː/) is a family of mysticete whales that contains two living genera. Commonly called the right whales as it contains mainly right whale species. This name can be confusing, however, since one of the species is the Bowhead Whale, which is different from the right whales.

Characteristics

Balaenids are large whales, with an average adult length of 15 to 17 metres (45-50 feet), and weighing 50-80 tonnes. Their principle distinguishing feature is their narrow, arched, upper jaw, which gives the animals a deeply curved jawline. This shape allows for especially long baleen plates. The animals utilise these by floating at or near the surface, and straining food from the water, which they then scrape off the baleen with their tongues - a feeding method that contrasts with those of the rorquals and the Gray Whale. Their diet consists of small crustaceans, primarily copepods, although some species also eat a significant amount of krill.[2]

Balaenids are also robustly built by comparison with the rorquals, and lack the grooves along the throat that are distinctive of those animals. They have exceptionally large heads in comparison with their bodies, reaching 40% of the total length in the case of the Bowhead Whale. They have short, broad, flippers, and lack a dorsal fin.

All species are at least somewhat migratory, moving into warmer waters during the winter, during which they both mate and give birth. Gestation lasts 10–11 months, results in the birth of a single young, and typically occurs once every three years.[2]

Taxonomy

* Family Balaenidae


* Genus Balaena
o Bowhead Whale, Balaena mysticetus


* Genus Eubalaena
o North Atlantic Right Whale, Eubalaena glacialis
o North Pacific Right Whale, Eubalaena japonica
o Southern Right Whale, Eubalaena australis


References

1. ^ Mead, James G.; Brownell, Robert L., Jr. (16 November 2005). "Order Cetacea (pp. 723-743)". In Wilson, Don E., and Reeder, DeeAnn M., eds. Mammal Species of the World: A Taxonomic and Geographic Reference (3rd ed.). Baltimore: Johns Hopkins University Press, 2 vols. (2142 pp.). ISBN 978-0-8018-8221-0. OCLC 62265494. http://www.bucknell.edu/msw3/browse.asp?id=14300003.
2. ^ a b Gaskin, David E. (1984). Macdonald, D.. ed. The Encyclopedia of Mammals. New York: Facts on File. pp. 230–235. ISBN 0-87196-871-1.

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