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The three genera and four species of Larainae (Elmidae) previously described from Australia are reviewed, and one new genus and seven new species are described: Australara glaisterigen. et sp. nov., Ovolara lawrenceisp. nov., Ovolara monteithisp. nov., Stetholus carinatussp. nov., Stetholus longipennissp. nov., Stetholus metatibialissp. nov., and Stetholus woronorasp. nov. A lectotype is designated for Hydora laticeps (Carter & Zeck), and the first new collection records of the species are reported since its description in 1932. The occurrence in Australia of Potamophilinus papuanus Satô, described from Papua New Guinea, is reported. A key to the species, photographic images of the external morphology and male genitalia, distribution maps, and habitat and behavioral information, when known, are provided for all twelve species of Australian Larainae.

The riffle beetle genus Hexanchorus Sharp, 1882 is distributed from Mexico to Argentina, forming an important component of the freshwater invertebrate fauna of Latin America. With 21 described species, Hexanchorus represents one of the most speciose Larainae genera, but its real diversity is likely much higher. We analysed material from a relatively small area in Ecuador, resulting in the first record of H.cordillierae for Ecuador and discovery of four new species and one subspecies: Hexanchorusvirilissp. n., Hexanchorusrostratussp. n., Hexanchorusshepardisp. n., Hexanchorusonoreisp. n. and Hexanchorusonoreisagittatusssp. n. For delimiting and characterizing species, both morphological and molecular (mtCOI DNA barcodes) data were used. A distribution map of Hexanchorus species is provided based on published records.

Hydrethus Fairmaire, Elmidae Larainae from Madagascar, is revised. The nomenclature, biology and ecology of Larainae are recalled and the genus is redescribed and redefined. The morphology of the female internal ectodermal genitalia is described for the first time. H. dermestoides Fairmaire, H. proximus Delève and H. perrieri Delève and redescribed. Female genitalia of H. dermestoides are described for the first time. A new species, H. elouardi n. sp. is described. A phylogeny of the four known species is proposed using a cladistic analysis., Les Hydrethus Fairmaire, Elmidae Larainae de Madagascar, sont révisés. Après un rappel sur la nomenclature, la biologie et l'écologie des Larainae, le genre est redécrit et redéfinit. La morphologie de l'appareil génital ectodermique interne des femelles est décrite pour la première fois. H. dermestoides Fairmaire, H. proximus Delève et H. perrieri Delève sont redécrits. Les pièces génitales femelles de H. dermestoides sont décrites pour la première fois. Une nouvelle espèce, H. elouardi n. sp. est décrite. Une clé d'identification des Hydrethus est proposée. Une phylogénie des quatre espèces connues est proposée sur la base d'une analyse cladistique., Bameul Franck. Les Hydrethus Fairmaire (Coleoptera, Elmidae). In: Bulletin de la Société entomologique de France, volume 101 (3), août 1996. pp. 273-288.

A key for the adults of all South American genera of the family Elmidae is provided. The key includes nine genera presently assigned to the subfamily Larainae and 29 genera assigned to the subfamily Elminae. Distributional data for all genera are also included. Fil: Manzo, María Verónica. Universidad Nacional de Tucumán. Facultad de Ciencias Naturales e Instituto Miguel Lillo; Argentina. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina