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).