瓣齒鯊目

瓣齒鯊目(學名:Petalodontiformes)為已滅絕全頭亞綱軟骨魚類,生存於石炭紀二疊紀,化石發現於美國歐洲[1],多半僅有牙齒留存[1][2]。牠們在二疊紀-三疊紀滅絕事件中絕種[1]

瓣齒鯊目
化石时期:石炭紀二疊紀
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: 全頭亞綱 Holocephali
总目: 副鯊總目 Paraselachimorpha
目: 瓣齒鯊目 Petalodontiformes
Zangerl, 1981

瓣齒鯊目最著名的物種為發現於石炭紀蒙大拿州熊谷石灰岩英语Bear Gulch Limestone中的 Belantsea montana英语Belantsea montana 與二疊紀歐洲的 Janassa英语Janassa bituminosa,為目前瓣齒鯊目下唯二有發現完整全身化石的物種。

瓣齒鯊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
  • 瓣齒鯊科 Petalodontidae
  • †Belantseidae

參考文獻

  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