Perionyx excavatus

Perionyx sp. — Tran, 1985: 56.

Remarks. The species is commonly used in earthworm farms, and sold as " red earthworm " for fishing and other purposes in Vietnam.

Distribution. Cosmopolitan species, widely distributed in Australia, New Zealand, Japan, Korea, China, USA, Canada, England, Samoa, India, Taiwan, Thailand, Myanmar, Malaysia, Indonesia, Philippines, Madagascar, Cambodia (Gates 1972; Thai & Do 1989; Blakemore 20 12 a). Vietnamese name. Giun Qu ế, Trùn Qu ế.

Type locality. Vietnam (Saigon). Type material. MNHN, France. Examined material. 5 C, 5 A (CTU-EW. 003.01) Cho Moi, An Giang, 2 / 2010, coll. Ho Minh Thuan. Records from Vietnam. Yen Bai (Yen Bai); Ha Giang (Meo Vac); Cao Bang (Thach An); Lang Son (Binh Gia); Hanoi (Ba Vi NP); Quang Tri (Huong Hoa); Thua Thien Hue (Hue); Da Nang (Hoa Vang); Quang Ngai (Quang Ngai; Tu Nghia); Binh Dinh (Quy Nhon); Gia Lai (Pleiku); Phu Yen (Song Cau); Khanh Hoa (Nha Trang); Lam Dong (Da Lat; Don Duong; Duc Trong); Binh Thuan (Phan Thiet; Bac Binh; Duc Linh); Ho Chi Minh; Ca Mau (U Minh); Bac Lieu (Vinh Loi); Ben Tre (Thanh Phu); Tra Vinh (Chau Thanh); Vinh Long (Vung Liem); Can Tho (Cai Rang; Ninh Kieu; Thot Not; Phong Dien); An Giang (Chau Phu; Chau Thanh; Cho Moi); Hau Giang (Phung Hiep) (Perrier 1872; Thai 1987; Do 1994; Nguyen 1994; Le 1995 a; Pham 1995 c, 2010; Huynh & Nguyen 2004 a; Huynh 2005 a; Nguyen V. T. & Tran 2008; Nguyen et al. 2010; Nguyen 2014).