| Prostygninae | |
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 Prostygnus and Cutervolus from Kury (2012). | |
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Prostygninae Roewer, 1913 is a subfamily of Cranaidae, with 18 species from South America. Kury (2012) restricted its composition, but many of its component genera are poorly known, and their pertinence is doubtful. Even the familial allocation of Prostygninae is cloudy.