tailieunhanh - Two new earthworm species (Oligochaeta, megascolecidae) from Vietnam

Two new earthworm species are described from An Giang Province, southern Vietnam. Metaphire nhuongi sp. n. is distinguished from its congeners by having four pairs of spermathecal pores in lateroventral intersegments 5/6/7/8/9, and two pairs of genital markings in 17/18 and 18/19. Polypheretima alba sp. n. is recognized by multiple spermathecal pores in dorsal intersegments 4/5/6/7, genital markings 4-6 pairs on xix-xxiii, and body whitish. | TAP species CHI SINH HOC 2016, 38(4): 442-448 Two new earthworm (Oligochaeta, Megascolecidae) DOI: TWO NEW EARTHWORM SPECIES (Oligochaeta, Megascolecidae) FROM VIETNAM Nguyen Thanh Tung Can Tho University, Can Tho city, Vietnam ABSTRACT: Two new earthworm species are described from An Giang Province, southern Vietnam. Metaphire nhuongi sp. n. is distinguished from its congeners by having four pairs of spermathecal pores in lateroventral intersegments 5/6/7/8/9, and two pairs of genital markings in 17/18 and 18/19. Polypheretima alba sp. n. is recognized by multiple spermathecal pores in dorsal intersegments 4/5/6/7, genital markings 4-6 pairs on xix-xxiii, and body whitish. Keywords: Megascolecidae, Metaphire, Polypheretima, earthworms, new species, Vietnam. Citation: Nguyen Thanh Tung, 2016. Two new earthworm species (Oligochaeta, Megascolecidae) from Vietnam. Tap chi Sinh hoc, 38(4): 442-448. DOI: . *Corresponding author: thanhtung@. Received 2 November 2016, accepted 20 December 2016 INTRODUCTION An Giang is located in the Cuu Long river delta of the southernmost part of Vietnam. Its area is about 3, km2 with a majority part of delta (accounting for 87% its area) while hilly regions account for only 13%. Climate is moonsoon tropical with annual average temparate of 27oC, and two seasons: rainy one (from May to November) and dry one (from December to next April) (Le Thong, 2006). The fauna and flora of the region are very diverse, and many new species have been discovered recently (Nguyen Thanh Tung, Tran Thi Anh Thu, 2008). To date, 18 earthworm species belonging to 9 genera, 5 families have been reported from An Giang province (Nguyen Thanh Tung et al., 2012). Of these species, four were previousely described: Metaphire mangophila (Nguyen, 2011); Metaphire baii (Nguyen, 2011); Metaphire dorsomultitheca Nguyen & Nguyen, 2015 and Amynthas nhonmontis Nguyen & Nguyen, 2015. This paper is