平扭貝屬（學名：Platystrophia）是褶正形貝科下已滅絕的一個屬，生存於中奧陶紀至中志留紀，生活在海洋底部，利用短小的肉莖附着在石灰質或沙質基底上。[2]
特徵
殼體大小中等，外形接近長方形，兩瓣殼突出明顯。殼體沿着鉸線延展到很寬的程度，而鉸則向兩邊延展形成一對尖銳的耳狀突起。腹殼上有明顯的溝，背殼上則有相應的褶。殼間的連接線在前緣有顯著折褶。眾多頂鋒銳利的肋向殼的邊緣方向散發。[2]
物種[1]
- Orthis (Platystrophia) cypha James, 1874
- Orthis (Platystrophia) laticosta James, 1871
- Platystrophia acutilirata Conrad, 1842
- Platystrophia amoena McEwan, 1919
- Platystrophia annieana Foerste, 1910
- Platystrophia anomala Hiller, 1980
- Platystrophia baltica Zuykov & Harper, 2007
- Platystrophia biforatus Schlotheim, 1820
- Platystrophia caelata Williams, 1974
- Platystrophia chama Eichwald, 1861
- Platystrophia clarksvillensis Foerste, 1910
- Platystrophia colbiensis Foerste, 1910
- Platystrophia costata Zuykov, 2000
- Platystrophia costatus Pander, 1830
- Platystrophia crassoplicata Alichova, 1951
- Platystrophia cypha James, 1874
- Platystrophia dentata Pander, 1830
- Platystrophia elegantula McEwan, 1919
- Platystrophia extensa McEwan, 1920
- Platystrophia hongueda Li & Copper, 2006
- Platystrophia hopensis Foerste, 1910
- Platystrophia humilis Oraspold, 1959
- Platystrophia jaaniensis Rübel, 1963
- Platystrophia laticosta James, 1871
- Platystrophia lutkevichi Alikhova, 1951
- Platystrophia lynx Eichwald, 1830
- Platystrophia orbiculata Oraspold, 1959
- Platystrophia pogrebovi Zuykov & Harper, 2007
- Platystrophia ponderosa Foerste, 1909
- Platystrophia profundosulcata Meek, 1873
- Platystrophia quadriplicata Alikhova, 1951
- Platystrophia saxbyensis Oraspold, 1959
- Platystrophia scotica Williams, 1962
- Platystrophia trentonensis McEwan, 1919
參考文獻
外部連結
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