銳稜菊石（學名：Oxynoticeras），又名尖背菊石，是生存在侏羅紀海洋中的一屬菊石，為游速最快的菊石之一。[1]其化石分佈於歐洲及北美等地。[2]
特徵
銳稜菊石具有緊縮內旋的外殼和刀鋒般的腹稜，銳利的腹稜使牠們在水中游動時的阻力很小。縫合線複雜且有褶邊。體管從腹邊可見。[1]常見直徑為10厘米。[3]
物種
- Oxynoticeras choffati Pompeckj, 1906
- Oxynoticeras lymense Wright, 1881
- Oxynoticeras orientale Douvillé, 1916[4]
- Oxynoticeras oxynotum Quenstedt, 1843[4]
- Oxynoticeras simpsoni
- Oxynoticeras soemanni Dumortier, 1867[4]
- Oxynoticeras stenomphalum Dumortier, 1914[4]
- Oxynoticeras subinvolutum Spath, 1925
- Oxynoticeras williamsi Tutcher & Trueman, 1925[4]
參考文獻
外部連結
Wikiwand in your browser!
Seamless Wikipedia browsing. On steroids.
Every time you click a link to Wikipedia, Wiktionary or Wikiquote in your browser's search results, it will show the modern Wikiwand interface.
Wikiwand extension is a five stars, simple, with minimum permission required to keep your browsing private, safe and transparent.
