瓣齿鲨目

瓣齿鲨目(学名:Petalodontiformes)为已灭绝全头亚纲软骨鱼类,生存于石炭纪二叠纪,化石发现于美国欧洲[1],多半仅有牙齿留存[1][2]。牠们在二叠纪-三叠纪灭绝事件中绝种[1]

瓣齿鲨目
化石时期:石炭纪二叠纪
Belantsea montana英语Belantsea montana
科学分类 编辑
界: 动物界 Animalia
门: 脊索动物门 Chordata
纲: 软骨鱼纲 Chondrichthyes
亚纲: 全头亚纲 Holocephali
总目: 副鲨总目 Paraselachimorpha
目: 瓣齿鲨目 Petalodontiformes
Zangerl, 1981

瓣齿鲨目最著名的物种为发现于石炭纪蒙大拿州熊谷石灰岩英语Bear Gulch Limestone中的 Belantsea montana英语Belantsea montana 与二叠纪欧洲的 Janassa英语Janassa bituminosa,为目前瓣齿鲨目下唯二有发现完整全身化石的物种。

瓣齿鲨目在生态位上属于底栖鱼类,并不擅长快速游动,以行动迟缓或者固着生活的无脊椎动物为食。

下属分类

本科包括以下属:

  • †Janassidae
    • Cholodus St.John & Worthen, 1875
    • Ctenopetalus Agassiz, 1837
    • Cymatodus Newberry & Worthen, 1870
    • Dactylodus Newberry & Worthen, 1866
    • Fissodus St.John & Worthen, 1875
    • Gamphacanthus Miller, 1892
    • Gomphacanthus Davis, 1884
    • Janassa Münster, 1839
    • Peltodus Newberry & Worthen, 1870
    • Petalodopsis Barkas, 1874
    • Phoderacanthus Davis, 1883
    • Platacanthus M'Coy, 1848
    • Pnigeacanthus St.John & Worthen, 1875
    • Pristicladodus M'Coy, 1855
    • Stichacanthus Koninck, 1878
    • Strigilodus
      • Strigilodus tollesonae Hodnett, Toomey, Olson, Tweet & Santucci, 2023[3]
    • Thoracodus Cope, 1883
  • †Pristodontidae
  • 瓣齿鲨科 Petalodontidae
  • †Belantseidae

参考文献

  1. ^ 1.0 1.1 1.2 Lund, Richard, E. D. Grogan, and M. Fath. "On the relationships of the Petalodontiformes (Chondrichthyes)." Paleontological Journal 48.9 (2014): 1015-1029.
  2. ^ Dalla Vecchia, Fabio Marco, and Museo Paleontologico Cittadino. "A new petalodont tooth (Chondrichthyes, Petalodontiformes) from the Lower Permian of the Carnic Alps (Friuli, NE Italy)." Bollettino della Società Paleontologica Italiana 39 (2000): 225-228.
  3. ^ John-Paul M. Hodnett, Rickard Toomey, Rickard Olson, Justin S. Tweet and Vincent L. Santucci. 2023. Janassid petalodonts (Chondrichthyes, Petalodontiformes, Janassidae) from the middle Mississippian (Viséan) Ste. Genevieve Formation, Mammoth Cave National Park, Kentucky, USA. Historical Biology: An International Journal of Paleobiology. DOI: 10.1080/08912963.2023.2231955