Two new earthworm species of the genus Metaphire Sims & Easton, 1972 (Annelida: Oligochaeta: Megascolecidae) from Highlands of Vietnam Author Phan, Quoc T. 0009-0001-0305-6865 Institute of Food and Biotechnology, Can Tho University, Can Tho, Vietnam. & Hau Giang Community College, Vi Thanh, Hau Giang, Vietnam. ptquoc@hgcc.edu.vn Author Lam, Dang H. 0000-0002-1236-1087 School of Education, Can Tho University, Can Tho, Vietnam. lhdang@ctu.edu.vn Author Tran, Men T. 0000-0001-9885-7827 College of Natural Science, Can Tho University, Can Tho, Vietnam. ttmen@ctu.edu.vn Author Pham, Quang V. 0000-0001-7175-4684 Faculty of Environmental Science, University of Science, Vietnam National University, Hanoi, Vietnam. phamvanquang@vnu.edu.vn Author Nguyen, Anh D. 0000-0001-9273-0040 Institute of Biology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Rd., Cau Giay, Hanoi, Vietnam. & Graduate University of Science and Technology, Vietnam Academy of Science and Technology, 18, Hoang Quoc Viet Rd., Cau Giay, Hanoi, Vietnam. ndanh@ib.vast.vn text Zootaxa 2026 2026-01-12 5748 1 101 112 https://doi.org/10.11646/zootaxa.5748.1.5 journal article 314783 10.11646/zootaxa.5748.1.5 0a6f13bf-6624-4c5c-9ce8-b54db3a0ba12 1175-5326 19167543 D3D39389-896D-4EF2-9ACF-16566A8D940B

TABLE 1. Comparison of the morphology of M. mangcanhensis sp. nov. and its congeners found in Vietnam.

Characters	M. mangcanhensis sp. nov.	M. baii 1	M. birmanica 2	M. chaubinhensis 3	M. hilgendorfi 4
Source. 1: Nguyen (2011); 2: Lam et al. (2020); 3: Do et al. (1994); 4: Michaelsen (1892); 5: Nguyen et al. (2022a) re–described the type specimen.
Ventral distance between spermathecal pores	0.35X	0.40X	?	?	?
Ventral setae number between spermathecal pores	18–20/vi, 18–21/vii	?	?	9/v 18/viii	?
Shape of the seminal chamber	Elongated, terminal end slightly swollen	Twisted, terminal end slightly swollen	Ovoid	Baseball bat shape*	?
Length (mm)	70–126	80–115	92–98	120	150
Diameter (mm)	5.4–5.6	3.77–4.27	4.4–4.6	5–6	6
Segments	101–134	94–111	141–168	77	120
Clitellum	xiv–xvi	xiv–xvi	xiv–xvi	1/3xiv–2/3xvi	xiv–xvi
First dorsal pore	12/13	12/13	11/12	12/13	12/13
Pre–clitellar setae	48–56/viii	54–60/viii	109–117/viii	42/viii	?
Pre–clitellar setae	55–62/xxx	69–71/xxx	89–94/xxx	70/xxv	?
Ventral setae number between male pores	14–16	13–17	9–11	18	?
Spermathecal markings	2 groups in vii	Absent	Absent	Numerous next to spermathecal pore	?
Male markings	Absent	Absent	Absent	?	1 pair
Ampulla	Ovoid or cordate shaped	Oval	Oval	Cordate	?
Diverticulum	Coiled	coiled	Strongly waved	Straight	?
Caeca	Simple	Manicate	Manicate	Manicate	manicate
Testis sac	Connected	Connected 5	Separated	Connected	?
Accessory glands	Mushroom shaped, long stalk	Absent	Absent	Mushroom shaped, long stalk	?
Typhlosole	Lamelliform	Lamelliform	Lamelliform	Poor develope	?
Lymp gland	29/30	Absent	16/17	Absent	?