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萼菊石

萼菊石属
化石时期:99.7–89.3 Ma[1]
白堊紀
Calycoceras (Newboldiceras) asiaticum的化石
科学分类 编辑
界: 动物界 Animalia
门: 軟體動物門 Mollusca
纲: 頭足綱 Cephalopoda
目: 菊石目 Ammonitida
科: 刺菊石科 Acanthoceratidae
亚科: 刺菊石亚科 Acanthoceratinae
属: 萼菊石属 Calycoceras
Hyatt英语Alpheus Hyatt, 1900
亞屬
  • Calycoceras
  • Gentoniceras
  • Newboldiceras
  • Proeucalycoceras
異名
  • Calycoceras (Metacalycoceras) Spath, 1926
  • Metacalycoceras Spath, 1926[1]

萼菊石學名Calycoceras)是生存在白堊紀海洋中的一屬菊石,由於其粗壯的肋條和圓胖的殼形,萼菊石和其近親可能不擅長於水平游動,而較擅長垂直地在深淺海域之間往返遷移,其粗大的體管或許有助於讓牠們能更快速、大輻度的調節氣室浮力。[2]化石分布於北美英國保加利亞法國巴布亞紐幾內亞南極洲等地。[1]

特徵

[编辑]

萼菊石的外殼有著粗壯的肋條,腹側具有明顯的5排結節。和其他許多刺菊石類一樣,萼菊石殼體內部的體管相當粗大。[2]

物種

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  • Calycoceras algeriense Kennedy & Gale, 2017
  • Calycoceras annulatum Collignon, 1964
  • Calycoceras asiaticum (Jimbo, 1894)[3]
    • C. a. asiaticum (Jimbo, 1894)[3]
    • C. a. spinosum (Kossmat, 1897)[3]
  • Calycoceras besairieri Collignon, 1937
  • Calycoceras boreale Kennedy, Cobban & Landman, 1996 [4]
  • Calycoceras cenomanense (d’Archiac, 1846)
  • Calycoceras dromense (Thomel, 1972) [5]
  • Calycoceras navicularis Mantell, 1822
  • Calycoceras orientale Matsumoto, Saito & Fukada [6]
  • Calycoceras paucinodatum (Crick) [7]
  • Calycoceras tarrantense[8]

參考文獻

[编辑]
  1. ^ 1.0 1.1 1.2 Fossilworks: Calycoceras. [2018-08-14]. (原始内容存档于2017-12-17) (英语). 
  2. ^ 2.0 2.1 Calycoceras 萼菊石 (美國) @ 菊海神遊 Swimming with Ammonites :: 痞客邦 ::. [2018-08-14] (中文(繁體)). 
  3. ^ 3.0 3.1 3.2 William James Kennedy, Herbert Christian Klinger (2010) Cretaceous faunas from Zululand and Natal, South Africa. The ammonite subfamily Acanthoceratinae de Grossouvre, 1894页面存档备份,存于互联网档案馆
  4. ^ Global Names Index. [2018-08-14]. (原始内容存档于2015-04-18). 
  5. ^ AMNH (PDF). [2018-08-14]. (原始内容存档 (PDF)于2015-04-14). 
  6. ^ UMUT. [2018-08-14]. (原始内容存档于2018-04-10). 
  7. ^ Smithsonian Institutions. [2018-08-14]. (原始内容存档于2015-04-18). 
  8. ^ The Paleobiology Database. [2018-08-14]. (原始内容存档于2013-10-21). 
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萼菊石
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