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叠瓦蛤

叠瓦蛤属
化石时期:早侏罗世马斯特里赫特期
189–66 Ma
科学分类 编辑
界: 动物界 Animalia
门: 軟體動物門 Mollusca
纲: 双壳纲 Bivalvia
目: 莺蛤目 Pteriida
科: 叠瓦蛤科 Inoceramidae
属: 叠瓦蛤属 Inoceramus
Sowerby, 1814

见内文

叠瓦蛤学名Inoceramus,意为“坚固的锅”)是一种灭绝的海生翼形类双壳纲动物,类似于现存的珍珠贝属。生存于早侏罗世晚白垩世[1][2]

描述

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Inoceramus steenstrupi的巨型标本(约187厘米),发现于努苏阿克半岛(Nuussuaq Peninsula),格陵兰岛
近亲Cremnoceramus difformis的风化外壳碎片,突出了叠瓦蛤科外壳方解石棱柱的方向和纹理

叠瓦蛤具有由垂直于表面沉积的方解石构成的厚壳,未风化的化石外壳通常保有其活着时的珠母光泽。[3]大部分物种具有突出的生长线,呈凸出的半圆,与外壳的边缘同心。[3]

1952年,Inoceramus steenstrupi 的这具长187厘米的巨型标本被发现于奇拉基特克遗址(Qilakitsoq),该化石已有83百万年的历史,源自桑托期至下坎帕期[4]古生物学家推测,该物种巨大的体型可能源自对于浑浊水底环境的适应,其巨大的体型使其拥有相对较大的鳃部区域,使其能够在较为缺少氧气的环境下生存。[3]


分类

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叠瓦蛤科的内部分类存在争议,如Platyceramus属有时被认为属于该属的亚属。该属内的有效物种数量也存在争议。

下为该属内的种:

  • I. aequicostatus Voronetz 1937
  • I. albertensis McLearn 1926
  • I. altifluminis McLearn 1943
  • I. americanus Walaszczyk & Cobban 2006
  • I. andinus Wilckens 1907
  • I. anglicus Woods 1911
  • I. anilis Pcelinceva 1962
  • I. anomalus Heine 1929
  • I. anomiaeformis Feruglio 1936
  • I. apicalis Woods 1912
  • I. arvanus Stephenson 1953
  • I. bellvuensis
  • I. biformis Tuomey, 1854
  • I. brownei Marwick 1953
  • I. carsoni McCoy 1865
  • I. comancheanus
  • I. constellatus Woods 1904
  • I. corpulentus McLearn 1926
  • I. coulthardi McLearn 1926
  • I. cuvieri Sowerby 1814
  • I. dakotensis
  • I. dominguesi Maury 1930
  • I. dowlingi McLearn 1931
  • I. dunveganensis McLearn 1926
  • I. elburzensis Fantini 1966
  • I. everesti Oppel 1862
  • I. fibrosus Meek & Hayden 1857
  • I. formosulus Voronetz 1937
  • I. fragilis Haal & Meek 1856
  • I. frechi Flegel 1905
  • I. galoi Boehm 1907
  • I. gibbosus
  • I. ginterensis Pergament 1966
  • I. glacierensis Walaszczyk & Cobban 2006
  • I. haast Hochstetter 1863
  • I. howelli White 1876
  • I. incelebratus Pergament 1966
  • I. inconditus Marwick 1953
  • I. kystatymensis Koschelkina 1960
  • I. lamarcki Parkinson 1819
  • I. lateris Rossi de Gargia & Camacho 1965
  • I. mesabiensis Bergquist 1944
  • I. morii Hayami 1959
  • I. multiformis Pergament 1971
  • I. mytiliformis Fantini 1966
  • I. nipponicus Nagao & Matsumoto 1939
  • I. perplexus
  • I. pictus
  • I. pontoni McLearn 1926
  • I. porrectus Voronetz 1937
  • I. prefragilis Stephenson 1952
  • I. proximus'' Tuomey, 1854
  • I. pseudolucifer Afitsky 1967
  • I. quenstedti Pcelinceva 1933
  • I. robertsoni Walaszczyk & Cobban 2006
  • I. saskatchewanensis Warren 1934
  • I. selwyni McLearn 1926
  • I. sokolovi Walaszczyk & Cobban 2006
  • I. steinmanni Wilckens 1907
  • I. subdepressus Meek & Hayden 1861
  • I. tenuirostratus Meek & Hayden 1862
  • I. triangularis'' Tuomey, 1854
  • I. undabundus Meek & Hayden 1862
  • I. ussuriensis Voronetz 1937

参考文献

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叠瓦蛤
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