Water-beetles
Guides
Gymnochthebius
minute moss beetles
Gymnochthebius is a genus of minute moss beetles in the family Hydraenidae, containing more than 60 described species. The genus is particularly diverse in Australia and Papua New Guinea, where 36 species have been documented. These small water beetles inhabit marginal zones of aquatic habitats and show microhabitat specialization correlated with morphological adaptations.
Hydroporus
Hydroporus is a genus of small diving beetles (family Dytiscidae) with approximately 180 described species worldwide. The genus exhibits substantial morphological diversity organized into multiple species groups, including the longiusculus-group, longulus-group, memnonius-group, and nigellus-group. Members occur across the Palearctic, Nearctic, Near East, and North Africa. Several species complexes within the genus show convergent adaptations to specialized habitats, including semi-subterranean environments.
Limnebius
minute moss beetles
Limnebius is a genus of minute moss beetles in the family Hydraenidae, containing over 160 described species. The genus exhibits uniform external morphology but highly variable male genitalia, ranging from curved rod shapes in the subgenus Bilimneus to complex structures with up to seven longitudinal folds or appendages in Limnebius s.str. Species occur across multiple continents including Europe, Africa, Australia, and Papua New Guinea. The genus has been extensively studied for its morphological diversification and patterns of sexual dimorphism.
Ochthebius
minute moss beetles
Ochthebius is a large genus of minute moss beetles in the family Hydraenidae, comprising at least 460 described species. These tiny beetles are predominantly associated with aquatic and semi-aquatic habitats, particularly supratidal rockpools, coastal marshes, and freshwater spray zones. Many species exhibit narrow habitat preferences and restricted distributions, with numerous endemic taxa. The genus shows significant diversity in the Mediterranean region, Africa, and other parts of the world, and includes several cryptic species complexes.