Classification of the genus Plectorthis
G. †Plectorthis Hall and Clarke 1892
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†Orthis (Plectorthis) atava Matthew 1893
†Orthis (Plectorthis) christianiae Kjerulf 1865
†Orthis (Plectorthis) daunus Walcott 1905
†Orthis (Plectorthis) desmopleura Meek 1872
†Orthis (Plectorthis) desmopleura nympha Walcott 1905
†Orthis (Plectorthis) diablo Walcott 1905
†Orthis (Plectorthis) doris Walcott 1905
†Orthis (Plectorthis) hastingsensis Walcott 1905
†Orthis (Plectorthis) iddingsi Walcott 1905
†Orthis (Plectorthis) johannensis Matthew 1891
†Orthis (Plectorthis) kayseri Walcott 1905
†Orthis (Plectorthis) linnarssoni Kayser 1883
†Orthis (Plectorthis) newtonensis Weller 1903
†Orthis (Plectorthis) pagoda Walcott 1905
†Orthis (Plectorthis) papias Walcott 1905
†Orthis (Plectorthis) retroflexa de Verneuil 1830
†Orthis (Plectorthis) saltensis Kayser 1876
†Orthis (Plectorthis) tullbergi Walcott 1905
†Plectorthis altaicus Severgina 1967
†Plectorthis australis Cooper 1956
†Plectorthis burultasica Popov et al. 2002
†Plectorthis cliefdenensis Percival 1991
†Plectorthis exfoliata Raymond 1905
†Plectorthis licta Popov and Cocks 2006
†Plectorthis magna Cooper and Kindle 1936
†Plectorthis mazourkaensis Phleger, Jr. 1933
†Plectorthis obesa Cooper 1956
†Plectorthis patula Phleger, Jr. 1933
†Plectorthis perditosulcata Wright 1964
†Plectorthis plicatella Hall 1847
†Plectorthis ponderosa Cooper 1956
†Plectorthis punctata Cooper 1956
†Plectorthis scotica McCoy 1852