Otostigmus astenus ( Kohlrausch, 1878 )

Vu, Ha T., Nguyen, Hung D., Le, Son X., Eguchi, Katsuyuki, Nguyen, Anh D. & Tran, Binh T. T., 2020, A review and notes on the phylogenetic relationship of the centipede genus Otostigmus Porat, 1876 (Chilopoda: Scolopendromorpha: Scolopendridae) from Vietnam, Zootaxa 4808 (3), pp. 401-438 : 413-414

Otostigmus astenus ( Kohlrausch, 1878)

( Figs. 12–15 )

Branchiotrema astenon Kohlrausch, 1878: 70 , fig. 6;

Otostigmus astenus :— Chamberlin 1920: 13; Attems 1930: 143, fig. 174; Attems 1938: 337; Attems 1953: 138; Schileyko 1998: 268; Schileyko 2007: 78.

Material examined. SON LA Province: 1 specimen (IEBR-Chi 018) Ta Xua Natural Reserve , natural forests, 21.3471N– 104.6776E, elevation of 656 m, 13 November 2017, coll. Ha Kieu Loan & Le X. Son; HOA BINH

Province: 1 specimen (IEBR-Chi 016) Thuong Tien Natural Reserve , natural forests, 20.6378N– 105.4467E, elevation of 357 m, 14 May 2017, coll. Hoang N. Anh & Nguyen D. Hung; HA NOI : 1 specimen (IEBR-Chi 026) Ba Vi National Park (21.0851N– 105.3748E), regenerated forests, elevation of 400 m, 20 September 2016, coll. Nguyen D. Anh; DONG NAI Province : 1 specimen (IEBR-Chi 154) Cat Tien National Park, natural forests, on the way to Bau Sau , 11.4533N– 107.3658E, elevation of 180 m, 10–11 July 2018, coll. Nguyen D. Anh ;

Diagnosis. Body with 21 leg-bearing segments. Spiracles oval-shaped ( Fig. 12D ). Antennae with 21 antennomeres including first two glabrous ( Fig. 12 A–C). Coxosternal plate with 4+4 teeth ( Fig. 12C ). Tergites smooth, with paramedian grooves ( Fig. 13A ). Sternites with incomplete paramedian grooves ( Fig. 13B ). Coxopleural process long, conical, with 3 apical spines and 1–2 lateral ones ( Fig. 13 C–D). Spines on prefemur of the ultimate legs large and arranged in rows ( Fig. 14 A–B).

Previous records from Vietnam. VINH PHUC ( Schileyko 2007).

Distribution. The species has also been reported from India, Nepal, Cambodia, Indonesia, Taiwan, Molucca Islands, Fiji Islands, Hawaiian Islands, Tonga Islands, Solomon Islands, Bismarck Archipelago, and Australia ( Chamberlin 1920; Attems 1930, 1938; Lewis 2002; Chao & Chang 2003; Schileyko 2007).

Remarks. The species has been recorded in the northern part of Vietnam, so far. ( Fig. 15 ).

Figures

FIGURE 12. Otostigmus astenus (Kohlrausch, 1878) (IEBR-Chi 026). Antenna and anterior part of body, dorsal view (A). Head and basal antennomeres, dorsal view (B), ventral view (C). Spiracle 9th (D).

FIGURE 13. Otostigmus astenus (Kohlrausch, 1878) (IEBR-Chi 026). Tergites 9–10 (A). Sternites 9–10 (B). Coxopleural process, ventral view (C), lateral view (D).

FIGURE 14. Otostigmus astenus (Kohlrausch, 1878) (IEBR-Chi 026). Right ultimate leg, mesal view (A). Prefemur of the ultimate leg, ventral view (B).

FIGURE 15. Distribution of Otostigmus astenus (Kohlrausch, 1878) in Vietnam