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Type: Article
Published: 2023-03-15
Page range: 113-135
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A revision of the Metaphire peguana species-group (Oligochaeta: Megascolecidae) from Vietnam

Department of Biology, School of Education, Can Tho University, Vietnam.
Department of Biology, School of Education, Can Tho University, Vietnam.
Institute of Ecology and Biological Resources, Vietnam Academy of Science and Technology, 18, Hoangquocviet Rd., Caugiay, Hanoi.
Annelida Earthworms Metaphire pacseana peguana species-group COI genetic distance

Abstract

The Metaphire peguana species-group was revised from the earthworm fauna of Vietnam. As a result, a total of seven species/subspecies have been assigned to this species-gro+up, namely M. peguana peguana (Rosa, 1890), M. peguana laisonensis Nguyen & Nguyen, 2017, M. bahli (Gates, 1945), M. doiphamon Bantaowong & Panha, 2016, M. dorsomultitheca Nguyen & Nguyen, 2015, M. kiengiangensis Nguyen & Trinh, 2015, and M. nhuongi Nguyen, 2016. The species, M. pacseana (Thai & Samphon, 1988) was removed from the group. The species-group was diagnosed by having spermathecal pores in 6/7/8/9, sometimes 5/6/7/8/9 or 7/8/9; bithecate or polythecate; genital markings paired in 17/18 and 18/19 or in xvii and xix; accessory glands paired, coelomic, strongly covered by muscular-walled bursae; septum 10/11 only present ventrally; and intestinal caeca simple. The K2P genetic distances between the group members varies from 12.9% to 20.7%. The phylogenetic analysis clearly supports the members of this species-group.

 

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