正形贝目（学名：Orthida）是小嘴贝纲下的一个已灭绝的目。
下级分类
本目包括以下属：[1]
- Almadenorthis Reyes-Abril & Villas, 2010
- Archaeorthis Schuchert & Cooper, 1931
- Bastamorthis Ghobadi Pour, Kebria-ee Zadeh & Baars, 2011
- Celsiorthis Paterson & Brock, 2003
- Cyrtonotella Schuchert & Cooper, 1931
- Diochthofera Potter, 1990
- Duolobella Rasmussen, Harper & Blodgett, 2012
- Glossorthis Öpik, 1930
- Gutiorthis Reyes-Abril & Villas, 2010
- Humaella Zhu, 1982
- Lenorthis Andreeva, 1955
- Leoniorthis Egerquist, 2003
- Nugnecella Levy & Nullo, 1975
- Ocorthis Melou, 1982
- Orthambonites Pander, 1830
- Orthokopis Baarli, 1995
- Orthostrophella Amsden, 1968
- Orthostrophia Hall, 1883
- Palaeowingella Rasmussen, Harper & Blodgett, 2012
- Paralenorthis Havlíček & Branisa, 1980
- Planidorsa Schuchert & Cooper, 1931
- Poramborthis Havlícek, 1949
- Rogorthis Hints, 2014
- Sinorthis Wang, 1955
- Sivorthis Jaanusson & Basset, 1993
- Sonculina Misyus, 1986
- Sulcatorthis Zeng, 1987
- Sulevorthis Jaanusson & Basse, 1993
- Suriorthis Benedetto, 2003
- Taphrorthis Cooper, 1956
- Trondorthis Neuman, 1974
- Turanorthis Nikitina, Popov, Neuman, Bassett & Holmer, 2006
- Yichangorthis Zeng, 1987
参考文献
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