Polypheretima kyhaensis ( Thai , 1996 )

Nguyen, Tung T., Tran, Binh T. T. & Nguyen, Anh D., 2014, Earthworms of the ' acaecate' Pheretima group in Vietnam (Oligochaeta: Megascolecidae), with description of a new species from the Mekong delta, Zootaxa 3866 (1), pp. 105-121 : 115-116

Polypheretima kyhaensis ( Thai, 1996)

( Fig. 3 )

Pheretima kyhaensis Thai, 1996: 4 , Fig. 3 B.

Polypheretima kyhaensis — Nakamura 1999: 7; Blakemore 2007: 61.

Type material. Holotype: 1A (SORC-HV.224) QUANG NAM, Nui Thanh District, Ky Ha commune, 24 November 1989, coll. Pham Thi Hong Ha. Paratype: 1A, same data as holotype ( Thai 1996).

Description. Body cylindrical, colour pale. Prostomium epilobous. First dorsal pore in 11/12. Setae numerous, regularly distributed on segments, 160(40) in V, 126(50) in VIII, 32+ 16 in XVIII, 60(20) in XIX, 62 in XXV, aa>ab, zz>zy. Male porophores superficial. Spermathecal pores 4 pairs, ventral in 5/6-8/9. Genital markings presetal, paired, one pair each on VIII and IX, two pairs on XVIII and XIX, and one pair on XVII, XX and XXI. Ampulla heart-shaped, divercula small, attaching to duct. Holandric. Testes sacs extending to the lateral line. The first seminal vesicles more developed and larger than the other seminal vesicles. Ovaries large on septum 12/13. Prostate glands in XVII-XIX. Intestine beginning at XV, without caeca. Typhlosole simple, lamelliform, T=0.35. Last hearts in XII. Septa 8/9/10 absent, 4/5–7/8 thickened. Pharyngeal micronephridia in 5/6/7/8. Lymph glands not developed (Data from Thai 1996: 4–5.).

Records from Vietnam. Quang Nam Province (Nui Thanh, Ky Ha).

Distribution. Only known from Vietnam.

Remarks. The species is fairly similar to Polypheretima monticola (Beddard, 1912) , but differs in the absence of septa 8/9/10, more complicated arrangement of genital markings in the male pore region. Types were rechecked for this study.

Figures

FIGURE 3. Distribution of species of the genus Polypheretima in Vietnam. The exotic Po. elongata with many records all over the country is omitted.