Petalocheirus spinosissimus Distant, 1903

Truong, Xuan Lam, Zhao, Ping & Cai, Wan Zhi, 2007, Notes on the subfamily Salyavatinae (Hemiptera: Reduviidae) from Vietnam, with the description of a new genus, Zootaxa 1615, pp. 1-20 : 6-9

Petalocheirus spinosissimus Distant, 1903

( Figs. 12–24 )

Petalocheirus spinosissimus Distant, 1903: 260 . Putshkov & Putshkov 1995: 208; Maldonado-Capriles 1990: 486.

Redescription. Color. Body dark brown; longitudinal stripes of corium, mid and hind tibiae (except dark annulations), spots on subbasal portion of each connexival segment light yellowish brown ( Fig. 12 ); a distinct markings at apex of pale longitudinal stripe of corium black; apical, basal and subbasal annulations on mid and hind tibiae blackish brown; hemelytra with grayish yellow markings; head, femora (except ventral surface darker), ventral surface of fore tibiae (except sub-basal indistinct pale markings), spines on collar and posterior lateral pronotal angles, pleura, apical spine of scutellum reddish brown and sometimes suffused with black; ventral surface of femora, dorsal surface of fore tibiae (except sub-basal indistinct pale markings), scutellum (except apical spine), base of clavus, antennae, ventral surface of abdomen (except pale markings), connexivum (except pale spots), thoracic sterna, coxae and trochanters dark brown to black.

Structure. Body oblong-ovate, clothed with yellowish short bent setae (except glabrous portion); body beneath with white pubescence; antennae clothed with oblique short setae, third and fourth segments with several long setae; legs sparsely clothed with short and long setae. Head rugose, subequal in length to half of pronotum; anterior lobe of head dorsally with a short deep longitudinal sulcus before synthlipsis; anteclypeus slightly elevated; second antennal segment 1.5 times as long as first; rostrum strong, thick, slightly curved, first rostral segment subequal in length to second segment, third segment shortest. Collar processes suberect, produced laterally. Pronotum wider than long, median longitudinal sulcus extending from anterior portion of anterior pronotal lobe to posterior portion of posterior lobe; anterior pronotal lobe shorter than posterior; posterior lobe rugose; lateral pronotal angles produced anterolaterally with long, strong, suberect spines ( Figs. 12 , 13 ); apex of scutellum with an erect, long apical spine, postscutellum with a short spine ( Fig. 13 ); posterior margin of pronotum nearly straight; posterolateral margins faintly concave. Posterior angles of connexivum strongly spinously produced ( Figs. 12 , 15 ); fore coxa long and subequal to one-third of fore femur in length; fore tibia slightly shorter than fore femur, apical portion with a short furrow in which tarsus laid; mid and hind femora ventrally with a short spine subapically, fore femora beneath subapically each with a small tubercle ( Fig. 14 ). Abdomen moderately expended laterally. Pygophore oblong, posterior margin produced posteriorly with a broad and round brim ( Figs. 17, 18 ); paramere somewhat compressed, subbasal portion somewhat broad, apex somewhat acute and curvulate ( Figs. 19–21 ). Basal plate bridge thin, basal plate thick ( Fig. 23 ); pedicel broad and moderately long, basal plates thick; apical half of dorsal phallothecal sclerite anteriorly narrowly produced, apex slightly acute ( Fig. 23 ); struts strong, basal half raised, mostly fused, apart at base and apex, apical portion with a protuberance ( Figs. 22–24 ); endosoma with two pale lobe ventrally and two spoonshaped sclerite ventrolaterally, the later longer than half of phallosoma ( Figs. 23–24 ).

Measurements [ď (n=5)/ Ψ (n=4)]. Body length 14.07–14.91 /15.91–16.75; maximum width abdomen 5.15–5.67/6.51–6.72. Head length 1.58–1.79 /1.79–1.84; length anteocular portion 0.47–0.53 /0.47–0.58; length postocular portion 0.63–0.74/0.73–0.74; length synthlipsis 0.79–0.81/0.87–0.89; interocellar space 0.11–0.16/0.15–0.16; length antennal segments I–IV= 2.84–2.94/ 2.84–2.68, 4.35–4.36/3.89–4.10, 1.16–1.21/ 1.16, 1.02–1.05/1.26; length rostral segments I–III = 0.58–0.63/0.63–0.68, 0.63–0.68/0.68–0.74, 0.32–0.42/ 0.37; length anterior pronotal lobe 1.05–1.16 /1.21–1.26; length posterior pronotal lobe 1.68–1.89/2.00–2.10; maximal width thorax 3.78–3.94/3.94–4.25; length scutellum 0.99–1.00/1.05–1.37; length hemelytron 9.35– 9.45/11.03–11.29.

Material examined. 1 Ψ, Vietnam, Hoa Binh Province, Mai Chau District, 7.VIII.2004, Xuan Lam Truong leg ( IEBR); 1 ď, Vietnam, Nghe An Province, Pu Mat National Park, 27.VII.2004, Xuan Lam Truong leg ( IEBR); 2 ď, 2 Ψ, Vietnam, Ha Tay Province, Ba Vi National Park, 1–2.VI.2001, Xuan Lam Truong leg ( IEBR); 1 ď, Vietnam, Tay Ninh Province, Lo Go National Park, 50m, 24.XI.2002, Xuan Lam Truong leg ( IEBR); 1 Ψ, Vietnam, Dong Nai Province, Cat Tien National Park, 25.X.2004, 8.VIII.2005, Xuan Lam Truong leg ( IEBR); 1 ď, Vietnam, Vinh Phuc Province, Me Linh District, 24.V.2000, Xuan Lam Truong leg ( IEBR).

Distribution: China, Malaysia, Vietnam.

Figures

FIGURE 12. Petalocheirus spinosissimus Distant, ♂, habitus. Scale bar = 2.00 mm.

FIGURES 13 – 24. Petalocheirus spinosissimus Distant, ♂. 13, Head, pronotum and scutellum, antennae partly removed; 14, fore leg (part); 15 – 16, apical portion of abdomen; 17 – 18, pygophore; 19 – 21, paramere; 22 – 24, phallus; 13 – 14, 16, 17, 22, lateral view; 15, 18, 24, ventral view; 23, dorsal view. Scale bar of 13 – 16 = 1.00 mm; of 17, 18 = 0.50 mm; of 19 – 24 = 0.38 mm.