Amynthas munglonganus ( Thai et Tran, 1986 ), 2022

Grzelak, Katarzyna & Sørensen, Martin V., 2022, Echinoderes blazeji Grzelak & amp; Sørensen 2022, sp. nov., Zoological Studies 55 (52), pp. 1-13 : 2

Amynthas munglonganus ( Thai et Tran, 1986)

comb. nov. ( Fig. 2 , Table 1)

Pheretima dangi munglongana Thai et Tran, 1986: 9 , fig. 3B. Amynthas dangi munglonganus - Blakemore 2007: 27; Nguyen et al. 2016

Material examined: 3 matures ( CTUEW.078.02) bamboo forest, Thuong Tien NR, Kim Boi, Hoa Binh, 7/8/2005, coll. Anh D. Nguyen.

Diagnosis: Large-size worm, length 320-355 mm, diameter ca. 14-18 mm. First dorsal pore in 12/13. Prostomium epilobous. Spermathecal pores ventrally paired in intersegmental furrows 5/6/7/8. Male pores located in xviii, without copulatory pouches. Genital makings 5-6 pairs in front of spermathecal pores in v, vi and viii; and only one pair closely next to male pores. Holandric. Spermathecal ampulla oval-shaped, duct short. Testis sacs separated. Intestinal caeca manicate. Septa 8/9/10 absent.

Distribution: Nghe An (Ky Son); Quang Binh (Minh Hoa); Hoa Binh (Kim Boi) ( Thai and Tran 1986; Nguyen 1994; Nguyen et al. 2016).

Remarks: The species was originally described as the subspecies Pheretima dangi munglongana Thai & Tran, 1986 . However, it is different from its congener, A. dangi ( Thai, 1984) by having three spermathecal pores in 5/6/7/8 (two pairs in 7/8/ 9 in A. dangi ), presence of genital markings in both spermathecal and male pore regions, and a spermathecal ampulla duct short, while in A. dangi genital markings are absent in the spermathecal region, and the ampulla duct is almost absent. These differences lead to raising A. dangi munglonganus to full species rank.

An endemic species to Vietnam.

Figures

Fig. 2. Amynthas munglonganus (Thai & Tran, 1986) from Hoa Binh (CTU-EW.078.02). A, J: Male pore region, ventral view (mp = male pore; gm = gential markings); B, I: Spermathecal region, ventral view (sp = spermathecal pore); C, F: Spermathecae (amp = ampulla; dv = diverticula; ag = accessory gland); D, H: Prostatic gland (ag = accessory gland); E, G: Intestinal caeca. Scale bar = 1 mm.