Ochthebius (Aulacochthebius) strangulatus, Regimbart 1906

Perkins, Philip D., 2023, Taxonomic revision of African water beetles in the genus Ochthebius Leach (1815) subgenus Aulacochthebius Kuwert (1887) (Coleoptera: Hydraenidae), Zootaxa 5228 (5), pp. 501-546 : 503

O. (A.) strangulatus Régimbart 1906

Orchymont (1929) placed O. (A.) strangulatus as a junior synonym of O. (A.) exaratus Mulsant. Although the synonymy is rejected herein, it is clear that O. (A.) strangulatus is a member of the O. (A.) exaratus species group. This species has a distinctive aedeagus (with paramere setae), and among the African study materials there are only two species that match the external morphology of the O. (A.) exaratus species group (the second species being O. (A.) copiosus n. sp.). I have examined, including the male genitalia, specimens from Kenya, collected near the type locality of O. (A.) strangulatus , in addition to specimens from Angola, Namibia, Nigeria, South Africa, Uganda, and Zimbabwe. Type specimens of O. (A.) strangulatus Régimbart , including the male genitalia, should be examined to confirm my decisions. Type specimens will probably be in the Régimbart collection at the Paris Museum ( MNHN).