Polypheretima mekongmontis Nguyen, Tran & Nguyen, 2014

Nguyen, Tung T., Trinh, Kim-Binh T., Nguyen, Hong-Lan T. & Nguyen, Anh D., 2017, Earthworms (Annelida: Oligochaeta) from islands of Kien Hai District, Kien Giang Province, Vietnam, with descriptions of two new species and one subspecies, Journal of Natural History 51 (15 - 16), pp. 883-915 : 902-904

Polypheretima mekongmontis Nguyen, Tran & Nguyen, 2014

( Figure 14 )

Polypheretima mekongmontis Nguyen, Tran & Nguyen, 2014: 118 , fig. 6.

Material examined

45 matures (CTU-EW 028.04) Hon Tre Island (09°58 ʹ 33 ʹʹ N, 104°51 ʹ 19.3 ʹʹ E), Kien Hai Distrist , Kien Giang Province, 14 November 2013, coll . Kim-Binh T. Trinh.

Diagnosis

Body cylindrical, medium size, length 82–91 mm, diameter 3.2–3.7 mm, 103–150 segments. Prostomium prolobous. First dorsal pore in 12/13. Setal number 31–39 in viii, 42–53 in xxx, 5–7 between male porophores in xviii; setal distance aa> ab, zz> zy. Spermathecal pores multiple, in ventrolateral intersegments 4/5/6/7. Male pores located inside copulatory pouches in xviii. No genital markings in the spermathecal region, but two pairs in xvii and xix. Testis sacs separated. Holandric. Intestinal caeca absent. Septa 8/9/10 absent.

Habitats

The species was found in soils in which long-term trees are planted.

Remarks

The species was recently described from Hon Dat Mountain in the mainland of Kien Giang Province . It is recorded in Hon Tre Island for first time .

Figures

Figure 14. Polypheretima mekongmontis Nguyen, Tran & Nguyen, 2014. (a) Male region (mp = male pore, gm = genital markings); (b) prostatic gland; (c) ventral view of spermathecal region (sp = spermathecal pore); (d) spermathecae (amp = ampulla, dv = diverticulum); (e) casts. Scale bar = 1 mm for (a–d), and = 10 mm for (e).