(ofAcila (Acila) vigilia var. brevis Nagao & Huzioka, 1941 †)Nagao T., Huzioka K. (1941). Fossil Acila from Hokkaido and Karahuto (Saghalin). <em>Journal of the Faculty of Science, Hokkaido Imperial University, Series IV.</em> 6(2): 114-141. page(s): 130-135, pl. XXX, fig. 1-4 [details]
original description(ofAcila (Acila) vigilia var. brevis Nagao & Huzioka, 1941 †)Nagao T., Huzioka K. (1941). Fossil Acila from Hokkaido and Karahuto (Saghalin). <em>Journal of the Faculty of Science, Hokkaido Imperial University, Series IV.</em> 6(2): 114-141. page(s): 130-135, pl. XXX, fig. 1-4 [details]