Ocnerodrilus occidentalis Eisen, 1878

Ocnerodrilus occidentalis Eisen, 1878: 10, Plates I–II; Michaelsen 1900: 377; Chen 1933: 224, Fig. 14; Chen 1938: 426; Gates 1942: 99; Gates 1972: 273; Thai 1983: 122; Pham 1995c: 111; Thai 2000a: 311; Thai 2000b: 4; Blakemore 2002: 90, Figs 1.10–1.11; Huynh & Nguyen 2004a: 115; Huynh 2005a: 170; Huynh et al. 2005: 180; Blakemore 2008; Tran & Tran 2010: 8; Pham 2010: 65.

Ocnerodrilus occidentalis sinensis Eisen, 1900: 115, synonymized by Michaelsen (1900).

Ocnerodrilus tenellulus Gates, 1945a: 223, synonymized by Gates (1972).

Type locality. USA ( Californica, Fresno County).

Type material. USNM, USA.

Records from Vietnam. Widely found in central and north Vietnam (Thai 2000b).

Distribution. Pan-tropical, especially if all the reports of various parthenogenetic morphs are included, less frequently found in temperate regions (Blakemore 2002).

Vietnamese name. Giun ocnero phưƠng tây.

Remarks. The species probably originates from the neotropical regions (Gates 1972). In Vietnam, it is usually found in wet soils (Thai 2000b).