Pheretima rarusa, (Thai, 1997)

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 : 111

Planapheretima rarusa ( Thai, 1997)

( Fig. 2 )

Pheretima rarusa Thai, 1997: 1 , Fig. 2 A.

Planapheretima rarusa — Blakemore 2007: 85.

Type material. Holotype: 1C (SORC-V.202) Nghe An province, Ky Son District, Muong Long commune, Tham Lang village, forest, 21 June 1986, coll. Tran Minh Khoi. Paratypes: 1C, 1A, same data as holotype; 1C, Nghe An province, Ky Son District, Chau Son, primary forest ( Thai 1997).

Description. Body length 75mm, diameter 3.5–4mm, segments 92. Body flattened ventrally with creeping sole. Prostomium epilobous. First dorsal pore in 9/10. Clitellum in XIV–XVI. Setae numerous, more distributed ventrad, 65(57) in V, 81(71) in VIII, 27–30 in XVIII, 68 in XXV, yz=7ab, zz=11aa. Porophores in shallow pouches of parietal invagination. Genital markings small, oval papillae, ranged in transversal presetal and postsetal lines, 2 on XVII, 3+2 on XVIII and 2 on XIX. Spermathecal pores three pairs, dorsolateral in 5/6/7/8. Ampulla more or less heart-shaped, diverticula as long as or longer than ampulla, attaching to ducts. Testes sacs ventral, not separated. Seminal vesicles well developed in XI–XVI. Prostate glands well-developed, strongly lobuled. Ovisacs well developed. Last hearts in XIII. Intestine beginning at XV. Intestinal caeca in XXVI–XXVII. Septa 8/9/10 present, other septa thinned. Pharyngeal micronephridia in 6/7. (Data from Thai 1997: 1–2.)

Records from Vietnam. Nghe An Province (Ky Son: Muong Long) ( Thai 1997).

Distribution. Only known from Vietnam.

Remarks. The species is very close to Planapheretima plumatomusculata ( Thai, 1982) but differs in violet color dorsally, having copulatory pouch, genital markings in male regions, and accessory glands with long duct ( Thai 1997). Types were rechecked for this study.

Figures

FIGURE 2. Distribution of species of the genus Planapheretima in Vietnam.