準石燕屬

準石燕屬（學名：）是準石燕科準石燕亞科下已滅絕的一個屬，生存於晚志留紀至侏羅紀，殼頂朝下生活在海底的鬆軟泥質沉積中。

特徵
殼形從三角形到近五邊形都有，兩殼凸起，殼頂向下大幅度彎曲，並有醒目的肉莖和發達的鉸合面。兩殼上均有多道醒目、圓形的肋，背殼中央有一道很深的褶皺，而腹殼上則有相應的、很深的凹陷，兩殼閉合線呈明顯的波浪狀。保存完好的標本上常可發現作為飾紋的纖細殼針。

物種
*Spiriferina (Mansuyella) Reed, 1944
*Spiriferina (Mentzelia) Quenstedt, 1871
*Spiriferina abichi Oppel, 1865
*Spiriferina alia Hall & Whitfield, 1877
*Spiriferina betacalcis Quenstedt, 1858
*Spiriferina borealis Whiteaves, 1889
*Spiriferina cassiana Laube, 1865
*Spiriferina coreyi Smith, 1927
*Spiriferina elegantissima Gemmellaro, 1899
*Spiriferina fortis Bittner, 1890
*Spiriferina homfrayi Gabb, 1864
*Spiriferina kiparisovae Dagys, 1965
*Spiriferina munsterii Davidson, 1851
*Spiriferina nicklesi Corroy, 1927
*Spiriferina panderi Moeller, 1862
*Spiriferina papillosa Gemmellaro, 1899
*Spiriferina rostrata Zieten, 1830
*Spiriferina roundyi Girty, 1927
*Spiriferina rupicola Gemmellaro, 1899
*Spiriferina salomonensis Gemmellaro, 1899
*Spiriferina slovenica Siblik, 1965
*Spiriferina subfragilis Loczy, 1899
*Spiriferina terebratuloides Seguenza, 1883
*Spiriferina terzadica Bittner, 1890
*Spiriferina tornata Gemmellaro, 1899
*Spiriferina toulai Gemmellaro, 1899
*Spiriferina triplicata Mansuy, 1913
*Spiriferina walcotti Sowerby, 1822
*Spiriferina yukonensis Smith, 1927

參考文獻
外部連結
[http://paleodb.org/cgi-bin/bridge.pl?action=checkTaxonInfo&taxon_no=29642 Spiriferina*] in the Paleobiology Database