Amynthas exiguus taybacanus (Thai, 1984)

Pheretima exigua taybacana Thai, 1984b: 616, fig. 2B; Do: 1994: 75; Le 1995a: 34; Thai 2000a: 308; Huynh & Nguyen 2004a: 115; Huynh et al. 2005: 180.

Pheretima (Terrata) exigua taybacana— Thai 1983: 123.

Amynthas exiguus taybacanus— Blakemore 2007a: 34; Blakemore 2008b.

Type locality. Vietnam (Ninh Binh: Cuc Phuong NP).

Type material. ZMUM (W.237), Russia.

Records from Vietnam. Cao Bang (Thach An); Lang Son; Thai Nguyen (Dinh Hoa); Bac Giang; Hanoi (Ba Vi NP); Ninh Binh (Cuc Phuong NP); Hoa Binh (Mai Chau); Son La (Moc Chau); Phu Tho (Xuan Son NP); Nghe An (Que Phong) (Thai 1984b; Do 1994; Le 1995a; Huynh & Nguyen 2004a; Huynh et al. 2005).

Distribution. Only known from Vietnam.

Vietnamese name. Giun nhỏ tây bắc.

Remarks. Thai (1983) proposed a new subgenus Terrata of the genus Pheretima, and placed the species under the new subgenus. Blakemore (2007a, 2008b) considered it as " species inquirenda ", further examination was not possible because all previously collected material has been lost.