出典:Wiktionary
出典:Wikipedia
出典:『Wikipedia』 (2011/02/26 21:01 UTC 版)
Balaena is a genus of cetacean in the Balaenidae family. This family is also known as the Right Whales, which can cause confusion as there is also a species of whale called the Right Whale. The only extant species is the Bowhead whale. The fossil record of Balaena, dating to the late Miocene, encompasses ten species known from finds in Europe, North America, and South America. Leiobalaena, described by Eschricht in 1849, is a junior synonym.