Epidaus bachmaensis Truong, Zhao & Cai, 2006

Truong, Xuan Lam, Zhao, Ping & Cai, Wanzhi, 2006, Taxonomic notes on the genus Epidaus Stål (Heteroptera: Reduviidae: Harpactorinae) from Vietnam, with the description of a new species, Zootaxa 1256 (1), pp. 1-9 : 4-8

Epidaus bachmaensis Truong, Zhao & Cai , sp. nov.

( Figs. 1–14 )

Description

Coloration: Body mostly yellowish brown; head, antennae, rostrum, fore legs, posterior lateral angles of fourth to sixth connexival segments reddish brown to brownish red ( Figs. 1 , 5 ); eyes brownish red with dark irregular markings, ocelli light yellow; abdomen beneath, four long spines on posterior pronotal lobe brownish black to black ( Figs. 1 , 2, 5 ); coxa, pronotum (except long spines on posterior pronotal lobe), ventral and lateral sides of thorax, markings of inner portion of third to seventh connexival segments ( Fig. 5 ) light brown to brown; posterior margin of pronotum, scutellum, corium, connexivum (except posterior angles of fourth to sixth connexival segments) yellowish; corium with some small wax­like spots; most of mid and hind legs, yellowish brown to reddish brown; membrane and claw yellowish, semitransparent.

Structure: Body large and elongate. Body clothed with white, short, bent pubescence and subvertical setae; first and second antennal segments with scattered oblique short setae, third and fourth segments with dense oblique short setae; first rostral segment with dense oblique short setae, second and third segments with sparse setae; legs clothed with oblique short setae and subvertical long setae, ventral surface of fore leg with abundant short erect setae; head, pronotum, scutellum, corium, lateral and ventral surface of thorax, abdomen clothed with pubescence and subvertical long setae. Head cylindrical; processes behind base of antennae short ( Figs. 1 , 2 ); first antennal segment longest and subequal to or slightly longer than third segment, fourth segment shortest and slightly shorter than second segment; eyes protruding laterally; ocelli widely separated; first rostral segment slightly longer than second segment, third segment shortest ( Fig. 2 ). Pronotum developed, nearly as long as wide; collar processes spine­shaped produced anteriorly, round at apex; middle longitudinal sulcus of anterior lobe deep at base; posterior pronotal lobe nearly twice as long as anterior lobe; anterior margin concave, posterior margin nearly straight; two large spines at middle of posterior part of posterior lobe very strong, erect and acute ( Figs. 1 , 2 ); lateral pronotal angles spine­shaped produced laterally; posterior angles round, slightly protruding; scutellum distinctly wider than long, with “Y”­shaped carina, apex round; profemur thickest; third tarsomere slightly longer than first and second tarsomeres combined. Abdominal connexivum expanded laterally, posterior angles of fourth to sixth segments protruded ( Figs. 1 , 5 ). Discal cell of hemelytra longer than wide and very small; base of inner cell wider than that of outer cell ( Fig. 1 ). Abdominal tip of female as shown in Fig. 3 . Pygophore oblong, median pygophore process round and wide ( Figs. 6, 7 , 8 ); paramere clavate and bent, sharp at apex, and subapical portion with long setae ( Figs. 9, 10 ); basal plate of phallus thin and curved, basal plate bridge thin, slightly arched in middle; pedicel short and wide; phallosoma ovate in dorsal and ventral view ( Figs. 12, 13 ), and bent upwards at apex in lateral view ( Fig. 11 ); dorsal phallothecal sclerite warped upward at apical part, middle of distal margin feebly concave ( Figs. 11, 12 ); struts fused at base and separated at apical 1/2, with two annular structures in middle, slightly longer than half of phallus in resting condition ( Fig. 12 );

Measurements [♂ (n=9) / ♀ (n=4), holotype in parentheses]: Body length 23.11–24.57 / 25.71–26.42 (23.11); maximum width of abdomen 6.67–7.53/7.20–7.36 (6.67). Head length 3.85–4.13/4.35–4.43 (4.13); length of anteocular portion 1.28–1.48/1.45–1.48 (1.48), length of postocular portion 1.92–2.07/2.1–2.14 (2.07); length of synthlipsis 0.59– 0.61/0.62–0.66(0.61); interocellar space 0.55–0.62/0.60–0.63 (0.62); length of antennal segments I–IV= 12.71–12.85/12.85–13.01 (12.79), 4.41–4.85/4.71–4.85 (4.41), 10.57– 11.29/10.57–11.04 (11.29), 3.66–4.12/4.00–4.38 (3.66); length of rostral segments I– III=2.28–2.38/2.48–2.52 (2.38), 1.64–1.90/1.72–2.01 (1.90), 0.64–0.69/0.71–0.73 (0.69). Anterior pronotal lobe length 1.41–1.48/1.50–1.57 (1.48); posterior lobe length 3.00–3.14/ 3.14–3.21 (3.14); thorax width 7.36–7.63/7.74–8.28 (7.36); scutellum length 0.69–0.78/ 0.80–0.86 (0.69); hemelytron length 15.00–16.13/16.04–17.14 (16.13).

Material examined

Holotype, ♂, Vietnam, Dac Lac Province, 600 m, 18.VIII. 2003, Xuan Lam Truong leg ( IEBR) . Paratypes, 1 ♀, same data as for holotype ( IEBR) ; 3 ♀, 8 ♂, Vietnam, Hue City , Bach Ma National Park, 15.VIII.2005, Xuan Lam Truong leg (1 ♀ and 4 ♂ kept in IEBR, 2 ♀ and 4 ♂ kept in CAU) .

Distribution Vietnam (Dac Lac, Hue City).

Etymology The specific name refers to the collecting locality.

Figures

FIGURE 1. Epidaus bachmaensis Truong, Zhao & Cai, sp. nov., ♂. Habitus. Scale bar = 3.33 mm

FIGURES 2–7. Epidaus bachmaensis Truong, Zhao & Cai, sp. nov., 2, 4–7, ♂, 3, ♀. 2, Head and pronotum, antennae removed; 3, apical portion of abdomen; 4, apical portion of abdomen; 5, abdomen; 6, apex of abdomen; 7, pygophore. 2, 5, 7, lateral view; 6, caudal view; 3, 4, ventral view. Scale bar of 2, 3, 4 = 1.33 mm; of 5 = 2.00 mm; of 6 = 1.00 mm; of 7 = 0.67 mm.

FIGURES 8–14. Epidaus bachmaensis Truong, Zhao & Cai, sp. nov., ♂. 8, pygophore; 9, 10, paramere; pygophore; 11, 12, phallus; 13, phallosoma; 14, struts. 8, 13, ventral view; 12, dorsal view; 11, lateral view. Scale bar of 8 = 1.00 mm; of 9–13 = 0.75 mm; of 14 = 0.375 mm.