Figure

Fig. 20.3. Immature stages of the Hydrophilidae. A–I, larval morphology: A, general larval habitus dorsally and laterally; B, larval head dorsally; C, larval head ventrally; D, details of clypeolabrum; E, antenna; F, mandible; G, labium in dorsal view; H, maxilla in ventral view; I, abdominal apex with spiracular atrium. J–Q, egg cases: J–K, Berosus sp.; L, Limnohydrobius melaenus (Germar); M, Anacaena lutescens (Stephens); N, Cercyon sp.; O, Chasmogenus nitescens (Fauvel); P, Hydrophilus piceus (Linnaeus); Q, Helochares sp. R–S, Chasmogenus nitescens, pupa (R, ventral view; S, lateral view). Adopted and adapted from: A–D, F–H, Minoshima & Hayashi (2011a); E, Minoshima & Hayashi (2012); J–N, O, R–S, Archangelsky (1997); M, Archangelsky and Fikáček (2004); P, van Berge Henegouwen (1982). I, redrawn and adapted from Clarkson et al. (2014).