Otostigmus scaber Porat, 1876

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 : 425-426

Otostigmus scaber Porat, 1876

( Figs. 28–31 )

Otostigmus (O.) scaber Porat, 1876: 20 ; Attems 1930: 153; Attems 1938: 337; Chamberlin & Wang 1952: 180; Attems 1953: 145; Schileyko 1992; Schileyko 1995: 268; Schileyko 2001: 429; Lewis 2001: 27, figs 48–52; Chao & Chang 2003: 2; Schileyko 2007: 81.

Material examined. SON LA Province: 1 specimen (IEBR-Chi 068) Ta Xua Natural Reserve , natural forests, 21.3447N– 104.6981E, elevation of 507 m, 10 February 2017, coll. Ha Kieu Loan & Le X. Son ; HOA BINH Prov-

ince: 1 specimen (IEBR-Chi 024) Thuong Tien Natural Reserve , natural forests, 20.6346N– 105.4383E, elevation of 347 m, 30 January 2018, coll. Hoang N. Anh & Nguyen D. Hung ; 3 specimens (IEBR-Chi 055, 056, 226) same locality, but 20.6346N– 105.4500E, elevation of 443–523 m, 31 January 2018, coll. Hoang N. Anh & Nguyen D. Hung; 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, Paul Marek, Jackson Means & Derek Hennen; QUANG NAM Province : 2 specimens (IEBR-Chi 256, 306) Song Thanh Natural Reserve , natural forests, elevation of 1,000 m, 11 January 2019, Le X. Son; GIA LAI Province : 1 specimen (IEBR-Chi 042) Kon Ka Kinh National Park (14.2589N– 108.3794E), natural forests, decaying woods, elevation of 920–1,200 m, 14 May 2016, coll. Le X. Son ; 6 specimens (IEBR-Chi 194–199) Kon Chu Rang Natural Reserve (14.4744N– 108.5405N), natural forests, 27–29 May 2016, coll. Le X. Son; DAK LAK Province : 2 specimens (IEBR-Chi 131, 134) Chu Yang Sin National Park (12.3037N– 108.3800E), natural forests, 10 June 2015, coll. Le X. Son.

Diagnosis. Body with 21 leg-bearing segments. Spiracles oval-shaped ( Fig. 29C ). Antennae with 21 antennomeres; first two and of the third glabrous ( Fig. 28 ). Coxosternal plate with 4–5 teeth, lateral pair clearly isolated and fused to a varying degree ( Fig. 28D ). Tergites 3–20 with 5–7 longitudinal sutures, without paramedian grooves; sternite with barely visible, incomplete, paramedian grooves ( Fig. 29 A–B). Coxopleural process long, conical, with 2–3 very tiny apical spines, and 2–3 lateral spines ( Figs 29D , 30A ). Prefemur of ultimate legs with large spines arranged in rows ( Fig. 30 B–C).

Previous records in Vietnam. HAI PHONG, QUANG BINH, DA NANG, GIA LAI, LAM DONG, DONG NAI ( Schileyko 1992, 1995, 2007; Attems 1938, 1953).

Distribution. Japan, China, Taiwan, Laos, Thailand, Myanmar, Indonesia, Malaysia, Hawaiian Islands, Russia ( Attems 1930, 1953; Lewis 2001; Chao & Chang 2003; Schileyko 2007).

Remarks. The species seems to be widely distributed in Vietnam ( Fig. 31 ).

Figures

FIGURE 28. Otostigmus scaber Porat, 1876 (IEBR-Chi 289). 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 29. Otostigmus scaber Porat, 1876 (IEBR-Chi 289). Sternites 9–10 (A). Tergites 9–10 (B). Spiracle 9th (C). Last segment and ultimate legs, dorsal view (D).

FIGURE 30. Otostigmus scaber Porat, 1876 (IEBR-Chi 289). Coxopleural processes, ventral view (A). Right ultimate leg, mesal view (B). Prefemur of the ultimate leg, ventral view (C).

FIGURE 31. Distribution of Otostigmus scaber Porat, 1876 in Vietnam