杜氏海牛屬

杜氏海牛屬
化石时期:晚中新世 - 上新世
16–5 Ma
杜氏海牛(D. jordani)復原圖
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 哺乳纲 Mammalia
目: 海牛目 Sirenia
科: 儒艮科 Dugongidae
亚科: 無齒海牛亞科 Hydrodamalinae
属: 杜氏海牛屬 Dusisiren
模式種
Dusisiren jordani
Kellogg, 1925
  • D. dewana Takahashi, Domning, and Saito, 1986
  • D. jordani Kellogg, 1925(模式種
  • D. reinharti Domning, 1978
  • D. takasatensis Kobayashi, Horikawa, & Miyazaki, 1995

杜氏海牛屬學名Dusisiren)為已滅絕大海牛近親,棲息於新近紀時期的北太平洋[1],化石發現於現今的美國加州以及日本

古生物學

杜氏海牛為海牛目中間斷平衡演化的例子之一,牠們演化自生存於紅樹林的祖先,在很短的時間內適應了北太平洋較寒冷的氣候,並以沿岸的海藻為食。更靈活的頸椎關節讓牠們能得以於有浪潮的海水中仍然能取食生長於海床上的海藻,較大的體型也能讓牠們得以適應較為低溫的海水[2][3]

目前已知杜氏海牛屬包含有4個種:

  • Dusisiren jordani Kellogg, 1925(模式種[4]
  • Dusisiren reinharti Domning, 1978[2]
  • Dusisiren dewana Takahashi, Domning, and Saito, 1986[5]
  • Dusisiren takasatensis Kobayashi, Horikawa, & Miyazaki, 1995[6]

參見

參考文獻

  1. ^ 存档副本. [2021-12-26]. (原始内容存档于2021-12-12). 
  2. ^ 2.0 2.1 D. P. Domning. 1978. Sirenian evolution in the North Pacific Ocean. University of California Publications in Geological Sciences 118:1-176
  3. ^ Wallace, David, 2007. Neptune's Ark: From Ichthyosaurs to Orcas. University of California Press, Berkeley. Pp. 115, 123-124.
  4. ^ R. Kellogg. 1925. A new fossil sirenian from Santa Barbara County, California. Carnegie Institution of Washington 348:9-11
  5. ^ S. Takahashi, D. P. Domning, and T. Saito. 1986. Dusisiren dewana, n. sp. (Mammalia: Sirenia), a new ancestor of Stellers sea cow from the upper Miocene of Yamagata prefecture, northeastern Japan. Transactions and Proceedings of the Palaeontological Society of Japan N. S. 141:296-321
  6. ^ S. Kobayashi, H. Horikawa, and S. Miyazaki. 1995. A new species of Sirenia (Mammalia: Hydrodamalinae) from the Shiotsubo Formation in Takasato, Aizu, Fukushima Prefecture, Japan. Journal of Vertebrate Paleontology 15(4):815-829

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