Metaphire kiengiangensis Nguyen & Trinh, 2015

Nguyen, Tung T., Lam, Dang H. & Nguyen, Anh D., 2023, A revision of the Metaphire peguana species-group (Oligochaeta: Megascolecidae) from Vietnam, Zootaxa 5255 (1), pp. 113-135 : 130-131

publication ID	https://doi.org/10.11646/zootaxa.5255.1.15
publication LSID	lsid:zoobank.org:pub:3F27E81A-87C7-48CD-8DF7-6FFDA0CD4907
DOI	https://doi.org/10.5281/zenodo.7746984
persistent identifier	https://treatment.plazi.org/id/03BDF84D-743D-FFEF-FF4D-13A98404FE0F
treatment provided by	Plazi (2023-03-17 10:59:25, last updated 2024-11-27 07:13:41)
scientific name	Metaphire kiengiangensis Nguyen & Trinh, 2015
status

Treatment

Metaphire kiengiangensis Nguyen & Trinh, 2015 View in CoL View at ENA

( Figure 12 View FIGURE 12 , Table 3 View TABLE 3 )

Metaphire kiengiangensis Nguyen et al. 2015: 461 View in CoL View Cited Treatment , fig. 1; Nguyen et al. 2016: 60 View Cited Treatment , 2017b: 898 View Cited Treatment , 2021c: 105.

Pheretima sp.9 – Nguyen 2013: 75, 2014: 111.

Type locality. Vietnam (Kien Giang: Lai Son island ) ( Nguyen et al. 2015) .

Type material. Laboratory of Zoology , Department of Biology, Can Tho University (EW.019.h01, EW.019. p02, EW.019.p03, EW.019.p04), Vietnam .

Diagnosis. Body cylindrical, large-medium size, length 176–280 mm, diameter 6.3–8.1 mm, segments 83–143. Prostomium epilobous. First dorsal pore at 12/13. Spermathecal pores numerous in ventrolateral intersegments 6/7/8/9, polythecate. Male pores located inside copulatory pouches in xviii. Two pairs of slit-shaped genital markings in 17/18 and 18/19. Male pores located inside copulatory pouches in xviii. Septum 10/11 present only ventrally. Intestinal caeca simple. Holandric, testis sacs separated. Accessory glands coelomic, strongly covered by muscularwalled bursae in 17/18 and 18/19.

Habitat. The species was extremely abundant in a leaf-litter layer under perennial mango gardens of mountainous areas; They excreted their feces to create columns emerging from the soil surface ( Nguyen et al. 2015).

Distribution. Known only in Vietnam (Kien Giang: Hon Dat, Hon Me mountains, and Lai Son island) ( Nguyen et al. 2015, 2017b) ( Fig. 3 View FIGURE 3 ).

Remarks. There is a minor difference in spermathecae between specimens collected from the mainland and from islands (ovoid-shaped spermathecae with thin duct vs. cylindrical-shaped with stout duct) ( Nguyen et al. 2015).

The K2P intraspecific genetic distance was 0.7%±0.3%. The genetic distance between M. kiengiangensis and other Metaphire species was from 16.5%±1.8% (with M. bahli (II)) to 21.6%±2.0% (with M. grandiverticulata ) ( Table 4 View TABLE 4 ).

References

Nguyen, T. T. (2013) The earthworm fauna of the Cuu Long delta PhD dissertation in Zoology, Hanoi National University of Education, Hanoi, Vietnam, 169 pp. [in Vietnamese]

Nguyen, T. T. (2014) Checklist and some remarks on faunistic characteristics of earthworms in the Mekong Delta, Vietnam. Can Tho University Journal of Science, 32 (2014), 106 - 119. [in Vietnamese]

Nguyen, T. T., Trinh, B. T. K., Le, N. V. & Nguyen, A. D. (2015) On the polythecate earthworms of the genus Metaphire (Oligochaeta: Megascolecidae) from Vietnam, with descriptions of three new species. Raffles Bulletin of Zoology, 63, 461 - 470.

Nguyen, T. T., Nguyen, A. D., Tran, B. T. T. & Blakemore, R. J. (2016) A comprehensive checklist of earthworm species and subspecies from Vietnam (Annelida: Clitellata: Oligochaeta: Almidae, Eudrilidae, Glossoscolecidae, Lumbricidae, Megascolecidae, Moniligastridae, Ocnerodrilidae, Octochaetidae). Zootaxa, 4140 (1), 1 - 92. https: // doi. org / 10.11646 / zootaxa. 4140.1.1

Nguyen, T. T., Trinh, B. T. K., Nguyen, L. T. H. & Nguyen, A. D. (2017 b) 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), 883 - 915. https: // doi. org / 10.1080 / 00222933.2017.1294213

Nguyen, T. T., Tran, T. H. & Nguyen, A. D. (2021 c) Diversity and distributional characteristics of earthworms in the Cuu Long river Delta, Vietnam. Journal of tropical Science and Technology, 24, 103 - 114. [in Vietnamese]

Figures

FIGURE 3. Distribution of Metaphire peguana species-group recorded all over the word (A) and in the South of Vietnam (B). 1. Metaphire bahli, 2. M. doiphamon, 3. M. dorsomultitheca, 4. Metaphire kiengiangensis, 5. Metaphire nhuongi, 6. Metaphire peguana laisonensis, 7. M. peguana peguana.

FIGURE 12. Metaphire kiengiangensis Nguyen & Trinh, 2015. A. Ventral view of the male pore region, B. Transverse body section of the male copulatory pouch, C. Transverse body section of accessory gland, D. Left spermathecae, E. Right prostatic gland, F. Caecum. Scale bar=1 mm.