Subgenus Trichogyrus Guignot, 1952 16— Orectogyrus (Trichogyrus) oscari (Apetz, 1854) Orectochilus oscari Apetz, 1854:14 (= Oreetoeheilus Apetz, 1854:14, incorrect subsequent spelling). Page number 14 not 13 as mentioned by Mazzoldi (2003). TYPE LOCALITY: Dongala (Sudan). SYNTYPES: not studied. DESCRIPTION: Brinck (1955:33). NEW COMBINATION: Régimbart (1884: 465). GEOGRAPHIC DISTRIBUTION: AFR–NV. REFERENCES: Régimbart (1886); Régimbart (1891); Pic (1909; as Ascari error); Brinck (1956); Brinck (1959); Alfieri (1976); Mazzoldi (2003). 17— Orectogyrus (Trichogyrus) sericeus (Klug, 1834) Gyrinus sericeus Klug, 1834: t. 34:12 TYPE LOCALITY: Dongala, Chandek, Ambukohl (Sudan). SYNTYPES: not studied. DESCRIPTION: Brinck (1956:180). NEW COMBINATION: Régimbart (1884: 464). GEOGRAPHIC DISTRIBUTION: AFR–NV. REFERENCES: Aubé (1838a); White (1847); Apetz (1854); Gemminger & Harold (1868); Régimbart (1884); Seidlitz (1887); Régimbart (1903); Régimbart (1907); Ferrante (1908); Pic (1909); Ahlwarth (1910); Alfieri (1916); Ebner (1921); Brinck (1956); Brinck (1959); Alfieri (1976); Mazzoldi (2003).

Published as part of Salah, Mohamed & Cueto, Juan Antonio Régil, 2015, An annotated checklist of the aquatic Adephaga (Coleoptera) of Egypt III. Noteridae, Haliplidae and Gyrinidae, pp. 187-200 in Zootaxa 4052 (3) on page 194, DOI: 10.11646/zootaxa.4052.2.3, http://zenodo.org/record/232303