Phylogeny of Berosini (Coleoptera: Hydrophilidae, Hydrophilinae) based on larval and adult characters, and evolutionary scenarios related to habitat shift in larvae

ARCHANGELSKY, MIGUEL

SYSTEMATIC ENTOMOLOGY (PRINT)

WILEY-BLACKWELL PUBLISHING, INC

Año: 2008 vol. 33 p. 635 - 650

0307-6970

Abstract. A phylogenetic analysis of Berosini including 15 taxa, 11 of thembelonging to Berosini (ingroup), was performed. Of the 58 characters used, 32derive from the larval stages, and 26 from the adult stage. Two well-supportedclades are recognized, one comprising Hemiosus and Berosus, and the othercomprising Derallus, Regimbartia and Allocotocerus. Several larval evolutionarytrends are discussed: shifts to benthic and cryptic habits, morphological modificationsand adaptations related to these habits, and morphological changes ofthe clypeolabrum and head appendages. A comparative table for the larval stagesof the five genera is included.