Guide To The Aquatic Heteroptera Of Singapore And Peninsular Malaysia. Xi. Infraorder Nepomorpha- Families Naucoridae And Aphelocheiridae Author Polhemus, Dan A. Author Polhemus, John T. text Raffles Bulletin of Zoology 2013 2013-08-30 61 2 665 686 journal article 10.5281/zenodo.5352700 2345-7600 5352700 Genus APHELOCHEIRUS Westwood, 1833 Discussion . — Members of the Aphelocheiridae are similar to Naucoridae in regard to their dorsoventally flattened bodies, lack of forewing venation, enlarged fore femora, anteriorly-directed male genitalia, and benthic ecology. As a result, they have been treated as a subfamily of Naucoridae by many previous authors (D. Polhemus & J. Polhemus, 1989 and references therein). Distinguishing characters for Aphelocheiridae include the antennae, which although 4-segmented as in Naucoridae are more slender and elongate, projecting well beyond the eyes when viewed from above; the labium, which is long, usually extending