Epidaus insularis Zhang, Zhao, Cao & Cai

Zhang, Wenjie, Zhao, Ping, Cao, Liangming & Cai, Wanzhi, 2010, Description of a new species of genus Epidaus Stål (Hemiptera: Reduviidae: Harpactorinae) from China, with a key to Chinese species, Zootaxa 2517, pp. 62-68 : 63-67

Epidaus insularis Zhang, Zhao, Cao & Cai , sp. nov.

(Figs. 1–17)

Description. Colouration: Body generally yellow to brownish yellow, slightly shining; head, basal two antennal segments, rostrum, fore and hind legs, anterior pronotal lobe, ventral surface of thorax, abdomen beneath, tarsi and claws yellowish brown to brown; apical two antennal segments, thoracic pleura and a stripe on lateral portions of abdomen brown to dark brown; eyes brownish black, shining; ocelli brownish red; four long spines on posterior pronotal lobe black; head beneath, fore coxae and coxal cavities, posterior pronotal lobe (except long spines on it), mid legs, stridulitrum, corium, connexivum yellowish; veins on membrane and hind-wings blackish brown to black; most of clavus and membrane yellowish brown and semitransparent.

Structure: Body medium-sized, elongate. Body clothed with yellow, shining, short, bent pubescence and subvertical setae; first and second antennal segments scattered with sparse, oblique, short setae, third and fourth segments with dense, oblique, short setae; first rostral segment with oblique, short setae, second and third segments with small setae; legs clothed with oblique, short setae and subvertical, long setae, undersurface of fore leg with abundant short erect setae; head, pronotum, scutellum, corium, lateral and ventral surfaces of thorax and abdomen clothed with pubescence and subvertical, long setae. Head cylindrical, with ventral margin straight in lateral view ( Fig. 2 ); anteocular part shorter than postocular, with a “V”-shaped transverse constriction before ocelli wide and deep, processes behind base of antennae small, coniform (Figs. 1, 2); anteclypeus cylindrical and prominent; first antennal segment longest and subequal to third segment, slightly longer than three times of head length, fourth segment shortest; eyes protruding laterally; ocelli Epidaus insularis Zhang, Zhao, Cao & Cai ,.,. Habitus. Scale bar = 3.47 mm widely separated; first rostral segment slightly longer and thicker than second segment, surpassing posterior margin of eye, third segment shortest. Collar processes developed, coniform; pronotum slightly shorter than width; middle longitudinal sulcus of anterior lobe deep at base; posterior pronotal lobe longer than anterior lobe; anterior margin concave, posterior margin nearly straight with posterior angles round and slightly protruding; two spines at middle of posterior part of posterior lobe big, slender, very strong, erect and acute; lateral pronotal angles spine-shaped produced laterally, pointed outward (Figs. 1–3); scutellum distinctly wider than long; fore femora thickest. Abdominal connexivum not expanded laterally, covered by forewings. Discal cell of hemelytron longer than wide; base of inner cell twice wider than that of outer cell (Fig. 1); abdominal tip of female as shown in Figs. 5–7 . Pygophore oblong, median pygophore process extended and wide, apex with two uncinate processes upwards ( Figs. 9–11 ); paramere club-shaped and bent into “S”, round at apex, with several long setae on apical half ( Figs. 12, 13 ); basal plate of phallus thin, basal plate bridge thin and slightly arched in middle; pedicel short and wide; phallosoma ovate in dorsal and ventral views ( Figs. 16, 17 ); dorsal phallothecal sclerite warped upward at apical part ( Fig. 14 ); struts fused at base and separated immediately, shorter than half of phallus in resting condition ( Fig. 16 ).

Measurements. [3 (n=4) /Ƥ (n=4), holotype in parentheses]: Body length 18.6–19.2 /20.3–21.1 (18.6); maximum width of abdomen 3.2–3.3/3.9–4.1 (3.3). Length head 3.2–3.4/3.4–3.6 (3.2); length anteocular portion 1.1–1.2/1.2–1.3 (1.2), length postocular portion 1.5–1.6/1.6–1.7 (1.5); length synthlipsis 0.6–0.65/ 0.7–0.75 (0.6); interocellar space 0.38–0.4/0.45–0.5 (0.4); length antennal segments I–IV= 9.6–9.8/10.1–10.6 (9.6), 4.4–4.5/4.7–4.8 (4.4), 7.6–7.8/7.8–7.9 (7.9), 3.1–3.2/2.6–2.7 (3.1); length rostral segments I–III=1.7– 2.0/1.9–2.1 (1.7), 1.4–1.5/1.6–1.7 (1.4), 0.6/0.7 (0.6); length anterior pronotal lobe 1.3/1.5–1.6 (1.3), length posterior lobe 1.9–2.0/2.1–2.2 (2.0); width thorax 4.1–4.2/4.6–4.7 (4.2); length scutellum 0.8–1.0/0.9–1.1 (0.8); length hemelytron 12.5–12.6/14.3–14.5 (12.6).

Type material. Holotype, 3, China, Hainan Province, Changjiang, Bawangling, 24.V.2007, Zhang Wenjie leg ( CAU). Paratypes, 1 3, 2 Ƥ, same data as for holotype ( CAU); 1 3, China, Hainan Province, Wuzhishan, Dengshandao, 3.V.2009, Zhang Wenjie leg ( CAU); 1 3, 2 Ƥ, Hainan Province, 9.V.2008, Zhang Wenjie leg ( CAU).

Distribution. China (Hainan).

Etymology. The specific name alludes to species’ island distribution.

Figures

FIGURES 2 – 7. Epidaus insularis Zhang, Zhao, Cao & Cai, sp. nov., 2 – 4, 3, 5 – 7, Ƥ. 2, Head and pronotum, antennae removed; 3, spines of pronotum; 4, apical part of right fore tibia and tarsus; 5, abdomen; 6, apex of abdomen; 7, apical part of abdomen. 2, 5, lateral view; 3, 7, caudal view; 4, dorsal view; 6, ventral view. Scale bar of 2 = 1.33 mm; of 3 = 1.00 mm; of 4 – 6 = 2.00 mm; of 7 = 0.71 mm.

FIGURES 8 – 17. Epidaus insularis Zhang, Zhao, Cao & Cai, sp. nov., 3. 8, Apex of abdomen; 9 – 11, pygophore; 12, 13, paramere; 14, 16, 17, phallus; 15, basal plate and basal plate bridge. 8, 9, 17, ventral view; 15, 16, dorsal view; 10, 14, lateral view. Scale bar of 8 = 1.33 mm; of 9 – 17 = 1.00 mm.