Immature stages of neotropical berosus (Coleoptera, Hydrophilidae): B. Toxacanthus Oliva, 1989, B. Coptogonus Jensen-Haarup, 1910, B. Cornicinus Knisch, 1922 and B. Auriceps Boheman, 1859

Abstract

The larval stages of three Neotropical Berosus are described and illustrated for the first time: B. toxacanthus Oliva, 1989, B. coptogonus Jensen-Haarup, 1910 and B. cornicinus Knisch, 1922; the pupa of B. auriceps is also described. Comparative notes on first and third instar larvae, and information on their biology is included. Morphological characters that differentiate third instar larvae of these three species from other known Argentine Berosus larvae are tabulated.