Otostigmus reservatus Schileyko, 1995

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 : 422-423

Otostigmus reservatus Schileyko, 1995

( Figs. 24–27 )

Otostigmus (O.) reservatus Schileyko, 1995: 83 , fig. 12; Schileyko 1998: 268; Schileyko 2001: 431; Schileyko 2007: 80, fig. 4.

Material examined. SON LA Province: 1 specimen (IEBR-Chi 007) Ta Xua Natural Reserve , natural forests, 21.3472N– 104.6775E, elevation of 675 m, 30 November 2017, coll. Ha Kieu Loan & Le X. Son ; HOA BINH Province: 1 specimen (IEBR-Chi 221) Thuong Tien Natural Reserve , natural forests, 20.6303N– 105.4347E, elevation of 441 m, 7 June 2017, coll. Hoang N. Anh & Nguyen D. Hung ; 1 specimen (IEBR-Chi 004) same locality ,

but 20.6353N– 105.4497E, elevation of 492 m, 31 January 2018; VINH PHUC Province: 1 specimen (IEBR-Chi 006) Me Linh station for Biodiversity, regenerated forests, 21.3972N– 105.7139E, 8 September 2018, coll. Vu T. Ha; 1 specimen (IEBR-Chi 002) same locality, but 10 September 2018, coll. Yamasaki A.; 10 specimens (IEBR-Chi 100, 101, 102, 104–106, 114, 116, 123) same locality, regenerated forests, 12–17 September 2016, coll. Vu T. Ha & Nguyen D. Anh; NINH BINH Province: 1 specimen (IEBR-Chi 005) Cuc Phuong National Park , natural forests, 20.3217N– 105.6081E, 28 July–2 August 2017, coll. Nguyen D. Anh, Vu. T. Ha, Paul Marek, Jackson Means & Derek Hennen .

Diagnosis. Body with 21 leg-bearing segments. Spiracles oval-shaped ( Fig. 25C ).Antennae with 17 antennomeres including first four glabrous dorsally ( Fig. 24 ). Coxosternal plate clearly separated, tooth margins consisting of 4 very tiny obtuse teeth ( Fig. 24D ). Segment 2 of telopodite of the second maxilla without distal spur. Tergites 4–20 with complete paramedian grooves ( Fig. 25A ). Sternites 2–19 with two complete paramedian grooves ( Fig. 25B ). Coxopleural process large, conical, with 5–7 apical spines, and several spines distributed laterally ( Fig. 26 A–B). Prefemur of ultimate legs with big, irregularly arranged spines ( Fig. 26 C–D).

Previous records in Vietnam. QUANG NINH, HAI PHONG, NINH BINH ( Schileyko, 1995, 2007).

Distribution. Only known from northern Vietnam ( Fig. 27 ).

Remarks. Our specimens agree well with the description of Schileyko (1995), except for the spine arrangement on the prefemur of the ultimate legs. Schileyko (1995) described the prefemur of the ultimate legs as having 5 parallel rows of spines: two ventrolateral (4 and 7 spines), two ventromedial (6 and 7) and a single dorsomedial row (4–5). In contrast, the prefemur of ultimate legs have large, irregularly arranged spines in our examined specimens.

Figures

FIGURE 24. Otostigmus reservatus Schileyko, 1995 (IEBR-Chi 002). Antenna and anterior part of body, dorsal view (A). Head and basal antennomeres, dorsal view (B). Ocelli, lateral view (C). Head, ventral view (D).

FIGURE 25. Otostigmus reservatus Schileyko, 1995 (IEBR-Chi 002). Tergites 9–10 (A). Sternites 9–10 (B). Spiracle 9th (C).

FIGURE 26. Otostigmus reservatus Schileyko, 1995 (IEBR-Chi 002). Last segment, and coxopleural processes, dorsal view (A). Coxopleural processes, ventral view (B). Right ultimate leg, mesal view (C). Prefemur of the ultimate leg, ventral view (D).

FIGURE 27. Distribution of Otostigmus reservatus Schileyko, 1995 in Vietnam