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V.L. Shull, A.P. Vogler, M.D. Baker, D.R. Maddison, P.M. Hammond. 2001.
Sequence Alignment of 18S Ribosomal RNA and the Basal Relationships of Adephagan Beetles: Evidence for Monophyly of Aquatic Families and the Placement of Trachypachidae.
Syst. Biol.. 2001, 50(6): 945-969.