Classification of the subgenus Acila (Truncacila)
Subg. Acila (Truncacila) Grant and Gale 1931
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†Acila (Truncacila) allisoni Squires and Saul 2006
†Acila (Truncacila) bellula Slodkewitsch 1967
†Acila (Truncacila) bivirgata Sowerby 1836
†Acila (Truncacila) blancoensis Howe 1922
Acila (Truncacila) castrensis Hinds 1843
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Invalid names: Acila (Truncacila) beringiana Slodkevisch 1967 [synonym], Acila empirensis Howe 1922 [synonym], Nucula lyalli Baird 1863 [synonym]
Acila (Truncacila) cobboldae Linnaeus 1767
†Acila (Truncacila) conradi Meek 1864
†Acila (Truncacila) dalli Arnold 1908
†Acila (Truncacila) decisa Conrad 1855
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Invalid names: Acila gabbiana Dickerson 1916 [synonym], Acila lajollaensis Hanna 1927 [synonym]
†Acila (Truncacila) demessa Finlay 1927
†Acila (Truncacila) galinae Slodkewitsch 1967
†Acila (Truncacila) grahami Squires and Saul 2006
†Acila (Truncacila) haidana Packard 1936
†Acila (Truncacila) hokkaidoensis Nagao 1932
Acila (Truncacila) jucunda Thiele and Jaeckel 1931
†Acila (Truncacila) moneronica Slodkewitsch 1967
†Acila (Truncacila) muta Clark 1918
†Acila (Truncacila) nagaoi Oyama and Mizuno 1958
†Acila (Truncacila) osugii Nagao and Huzioka 1941
†Acila (Truncacila) princeps Schenck 1943
†Acila (Truncacila) rosaria Squires and Saul 2006
†Acila (Truncacila) schencki Stoyanow 1949
†Acila (Truncacila) shumardi Dall 1909
†Acila muta markleyensis Clark 1918