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巴基鯨科

巴基鯨科
化石时期:52–48 Ma
始新世
伊纳巴基鲸 Pakicetus inachus
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 哺乳纲 Mammalia
目: 偶蹄目 Artiodactyla
下目: 鲸下目 Cetacea
科: 巴基鯨科 Pakicetidae

巴基鯨科学名Pakicetidae)是已滅絕哺乳動物鯨下目中最原始的成員。現今鯨目的成員,如鯨魚海豚都是水中生活的動物,巴基鯨科卻是生活在陸地上的。由於牠們的化石都是在近海邊發現,估計牠們會有部份時間在水中生活。[1][2]

已知的巴基鯨科包括像巴基鯨Nalacetus及像狐狸魚中獸。巴基鯨最初是由菲利浦·金格里奇(Philip Gingerich)等人於1983年發現,其下的三個物種都是在巴基斯坦發現,故得此名。這個區域相信於5300萬年前巴基鯨仍然生存時是特提斯海的海岸。[1][2]

巴基鯨科是肉食性的陸上動物,估計是現今鯨魚的祖先。牠們的耳骨位置、中耳的摺疊情況及臼齒上小齒的排列,都是與現今鯨魚相似及所獨有的。就現今的鯨魚演化歷史,一般接受是由巴基鯨科演化成兩棲的陸行鯨科,進而成為龍王鯨科及其後的鯨魚。[1][2]

参考文献

[编辑]
  1. ^ 1.0 1.1 1.2 Cooper, Lisa Noelle; Thewissen, J. G.M.; Hussain, S. T. New middle Eocene archaeocetes (Cetacea: Mammalia) from the Kuldana Formation of northern Pakistan. Journal of Vertebrate Paleontology. 2009-12-12, 29 (4): 1289–99. ISSN 0272-4634. OCLC 506008976. doi:10.1671/039.029.0423 (英语). 
  2. ^ 2.0 2.1 2.2 Uhen, Mark D. The Origin(s) of Whales. Annual Review of Earth and Planetary Sciences. 2010-04-01, 38 (1): 189–219 [2022-11-23]. Bibcode:2010AREPS..38..189U. ISSN 0084-6597. doi:10.1146/annurev-earth-040809-152453. (原始内容存档于2022-11-23) (英语). 
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巴基鯨科
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