Otostigmus amballae Chamberlin, 1913

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 : 410-411

Otostigmus amballae Chamberlin, 1913

( Figs. 8–11 )

Otostigmus (O.) amballae Chamberlin, 1913: 74 ; Attems 1930: 153; Schileyko 1992: 7; Schileyko 1995: 81, fig. 7; Schileyko 1998: 268; Schileyko 2001: 429; Schileyko 2007: 78.

Material examined. SON LA Province: 1 specimen (IEBR-Chi 069) Ta Xua Natural Reserve , bamboo forests, 21.3406N– 104.6804E, elevation of 346 m, 12 November 2017, coll. Ha Kieu Loan & Le X. Son ; 1 specimen (IEBR-Chi 013) same data, but 21.3491N– 104.6947E, elevation of 810 m, 11 November 2017 ; HOA BINH Province: 1 specimen (IEBR-Chi 014) Thuong Tien Natural Reserve , natural forests, 20.6346N– 105.4500E, elevation of 515 m, 31 January 2018, coll. Hoang N. Anh & Nguyen D. Hung ; 1 specimen (IEBR-Chi 054) same locality, but 20.6331N– 105.4503E, elevation of 564 m, 14 May 2017, coll. Hoang N. Anh & Nguyen D. Hung ; 1 specimen (IEBR-Chi 218) same locality, but bamboo forests, elevation of 441 m ; VINH PHUC Province: 2 specimens (IEBR-Chi 248-249), Me Linh station for Biodiversity , regenerated forests, 21.3885N– 105.7193E, 2-3 December 2018, coll. Vu T . Ha .

Diagnosis. Body with 21 leg-bearing segments. Spiracles oval-shaped ( Fig. 9C ). Antennae with 17 antennomeres; first two and ½ of the third glabrous; the last antennomere twice as long as previous one ( Fig. 8 ). Tergites 3–20 with three distinct longitudinal keels, and a slightly deep depression between these keels ( Fig. 9B ). Sternites 2–20 with wide and shallow paramedian grooves ( Fig. 9A ). Coxopleural process very short, conical, with up to 2 apical spines ( Figs 9B , 10A ). Prefemur of the ultimate legs with 0–4 ventral spines ( Fig. 10 B–C).

Previous records from Vietnam. HOA BINH, QUANG NINH ( Schileyko, 1992, 1995, 2007).

Distribution. The species has also been reported from India, Nepal and Thailand ( Attems 1930; Schileyko 2007), but it has only been found in northern Vietnam so far ( Fig. 11 ).

Figures

FIGURE 8. Otostigmus amballae Chamberlin, 1913 (IEBR-Chi 014). Antenna, dorsal view (A). Head and basal antennomeres, dorsal view (B). Ocelli, lateral view (C). Head, ventral view (D).

FIGURE 9. Otostigmus amballae Chamberlin, 1913 (IEBR-Chi 014). Sternites 9-10 (A). Tergites 9-10 (B). Spiracle 9th (C). Last segment, dorsal view (D).

FIGURE 10. Otostigmus amballae Chamberlin, 1913 (IEBR-Chi 014). Coxopleural processes, ventral view (A). Right ultimate leg, mesal view (B). Prefemur of the ultimate leg, ventral view (C).

FIGURE 11. Distribution of Otostigmus amballae Chamberlin, 1913 in Vietnam