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劍齒鮭
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劍齒鮭(學名:Oncorhynchus rastrosus),又稱獠牙鮭,是鮭形目鮭科鉤吻鮭屬的一種已滅絕的史前鮭魚,生存於中新世晚期到上新世早期[2]的北美洲太平洋沿岸。牠們身長約 2.7公尺(8英尺10英寸),比現存已知所有的鮭魚要大,但相信劍齒鮭同樣具有洄游的習性。劍齒鮭的名稱來自於雄性上顎吻部末端所突出的一對長約2—3公分(0.79—1.18英寸)的劍齒,劍齒可能是用來進行雄性之間的展示與競爭所用。劍齒鮭擁有較現存近親更大的鰓耙,因此科學家推測牠們是以浮游生物為食[3]。
參考文獻
- Cavender, T., & Miller, R. R. (1972). Smilodonichthys rastrosus: A new Pliocene salmonid fish from Western United States. Museum of Natural History, University of Oregon.
- Sankey, Julia; Biewer, Jacob; Basuga, Janis; Palacios, Francisco; Wagner, Hugh. The giant, spike-toothed salmon, Oncorhynchus rastrosus and the "Proto-Tuolumne River" (early Pliocene) of Central California.. PaleoBios. 2016, 33: 1–16 [2018-12-11]. (原始內容存檔於2020-08-19).
- Thomas P. Eiting, Gerald R. Smith, Miocene salmon (Oncorhynchus) from Western North America: Gill Raker evolution correlated with plankton productivity in the Eastern Pacific, Palaeogeography, Palaeoclimatology, Palaeoecology, Volume 249, Issues 3–4, 19 June 2007, Pages 412-424, ISSN 0031-0182
外部連結
- Saber-toothed salmon (頁面存檔備份,存於網際網路檔案館),the museum of natural and cultural history