Epidaus konkakinhensis Truong, Nguyen & Ha, 2025

Epidaus konkakinhensis Truong, Nguyen & Ha s p. nov.

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Figs 4B View Fig , 11–13 View Fig View Fig View Fig

Diagnosis

Body large-sized, pale luteous; scape very long, about 3.3 times as long as head, about 2.3 times as long as pedicel, about as long as first and second flagellomeres together, first flagellomere nearly 2.7 times as long as second flagellomere, scape and pedicel pale orangish yellow, first and second flagellomeres dark brown; collar thick in dorsal view, submerged medially, with anterolateral angle thorn-shaped produced anteriorly; posterior pronotal lobe punctured with posterior margin weakly concave, medially submerged; lateral pronotal spines and central pronotal spines blackish brown and surrounded by dark brown suffusions; scutellum pale brown, roundly triangular, triangularly depressed basally, and sloping downward, posterior apex round; abdominal sternites luteous, somewhat with irregular brown or orange suffusions

Differential diagnosis

This species is highly similar to Epidaus longispinus in general appearance, especially in body color and structures, and also has a very close relationship in molecular phylogeny (3.2% based on COI barcode). But the new species can be distinguished from E. longispinus by a combination of the following characteristics: body large size ( 19.2–20.5 mm in male) (in E. longispinus body large size but slightly smaller ( 20.3 mm in female)); posterior pronotal lobe without any longitudinal ridges (in E. longispinus posterior pronotal lobe with two short longitudinal ridges on the front edge); abdominal sternites luteous, somewhat with irregular brown or orange suffusions ( Fig. 11B View Fig ) (in E. longispinus abdominal sternites with brown broad longitudinal band on each side).

Etymology

The specific epithet refers to its occurrence in Kon Ka Kinh National Park, an adjective.

Type material

Holotype

VIETNAM – Gia Lai Province • ♂; Kon Ka Kinh National Park ; 26 Mar. 2022; X.L. Truong leg.; IB-DEB, TXL2022-148 .

Paratype

VIETNAM – Gia Lai Province • 1 ♂; same data as for holotype; IB-DEB, TXL2022-149 .

Non-type material

VIETNAM – Gia Lai Province • 1 ♂; same data as for holotype; IB-DEB, TXLBXN4 . – Thua Thien Hue Province • 1 ♂; Bach Ma National Park ; 3 Feb. 2024; X.L. Truong leg.; IB-DEB, TXL2024-156 .

Type locality

Vietnam, Gia Lai Province, Kon Ka Kinh National Park.

Description

Male

COLORATION. Body pale luteous. Head pale orangish yellow, except dorsal anterocular area of head and base of neck yellowish brown; dorsal anteocular area of head with medially longitudinal orange strip; gena pale orangish yellow with a central orangish suffusion; first and second visible labial segments pale yellow; third labial segment brown with yellowish brown basally ( Fig. 11C–D View Fig ). Scape and pedicel pale orangish yellow; first and second flagellomeres dark brown. Collar, anterolateral angle, propleuron, coxae, and anterior pronotal lobe pale orangish yellow; anterior pronotal lobe with irregular orange suffusions ( Fig. 12A View Fig ); posterior pronotal lobe pale luteous ( Fig. 12A View Fig ); lateral pronotal spines and central pronotal spines blackish brown and surrounded by dark brown suffusions ( Fig. 12A View Fig ); scutellum pale brown with pale luteous margins ( Fig. 12A View Fig ); anterior acetabulum, meso- and metapleural, and sterna pale brownish yellow; stridulatory sulcus pale luteous; trochanters yellowish brown; anterior femora yellowish brown with some longitudinal brown stripes; mid- and posterior femora, tibiae, and tarsi pale luteous. Coria pale luteous; clavus yellowish brown except posterior 2/3 semi-transparent ( Fig. 12B View Fig ); membrane pale bronzy brown, semi-hyaline ( Fig. 12B View Fig ). Hind wings faintly semi-hyaline ( Fig. 12C View Fig ). Abdominal mediotergites and laterotergites pale luteous ( Fig. 11B View Fig ); abdominal sternites luteous, somewhat with irregular brown or orange suffusions. Pygophore luteous.

STRUCTURE. Body large-sized ( 19.16–20.49 mm), elongated and posteriorly slightly widened ( Fig. 11AB View Fig ). Head tubular, slender, elongated ( Fig. 11C–D View Fig ); anteocular area of head elongate-conical; anteclypeus sub-cylindrical and slightly prominent; postocular area of head globose, distinctly wider than anteocular area, slightly shorter than anteocular area, constricted behind compound eyes, with a wide and deep interocular sulcus; neck short ( 0.59–0.77 mm) ( Fig. 11C–D View Fig ). Compound eyes protruding laterally, nearly globose, with posterior margin sub-straight, oblique with respect to ventral margin of head; lateral ocelli weakly produced, slightly elevated behind interocular sulcus, separated from each other; interspace between lateral ocelli wider than distance between compound eye and lateral ocellus ( Fig. 11C–D View Fig ). First visible labial segment slightly thicker and longer than second segment, longer than anteocular area of head, nearly extending beyond posterior margin of compound eye when labium laid backward ( Fig. 11D View Fig ); proportional average length of first to third visible labial segments 1.9: 1.5: 0.6. Scape very long, about 3.3 times as long as head, about 2.3 times as long as pedicel, about as long as first and second flagellomeres together; first flagellomere nearly 2.7 times as long as second flagellomere; proportional average length of scape, pedicel, first and second flagellomeres 10.7: 4.6: 7.8: 2.9. Collar thick in dorsal view, submerged medially, with anterolateral angle thorn-shaped produced anteriorly; anterior pronotal lobe small, hemisphered and bulged, smooth, deeply depressed at base; posterior pronotal lobe punctured, shallowly depressed on disc with two large central pronotal spines; humerus triangular, with a large laterally produced spine in lateral apex of each side; two central pronotal spines and two humerus spines formed a transverse row in basal 2/3 of posterior pronotal lobe; posterior margin of pronotum weakly concave, medially submerged; posterior angles round, slightly exceeding to posterior margin of pronotum ( Fig. 12A View Fig ). Scutellum roundly triangular, triangularly depressed basally, and sloping downward, posterior apex round ( Fig. 12A View Fig ). Femora elongated, slender but stout, moderate subnodulose apically, apical margin of femora with small spines evenly; tibiae slender and elongated. Hemelytra passing beyond apex of abdomen when fully closed, 0.7 times as long as body length ( Fig. 11A View Fig ); discal cell nearly diamond-shaped, slightly longer than wide ( Fig. 12B View Fig ); Sc 0.8 times as long as hemelytron length, 1.4 times as long as R+ M ( Fig. 12B View Fig ). Hind wing about 3.6 times as long as maximum width ( Fig. 12C View Fig ). Laterotergites slightly dilated and ascending with segmental incisures, postero-lateral margin of each laterotergite not exceeding antero-lateral margin of following laterotergite ( Fig. 11A–B View Fig ). Pygophore ovoid ( Fig. 13A–C View Fig ); median process of pygophore (mpp) posteriorly produced, 0.48 times as long as wide in ventral view; apical margin reflexed, submerged medially and apicolateral corner specifically formed point at the apex, and separated to two large lateral thorns, each thorn with a smaller prickle nearly perpendicularly at base in caudal view ( Fig. 13A–C View Fig ); paramere long, slender, clavate, somewhat incurved in apical part, with round apex ( Fig. 13A View Fig ). Aedeagus in dorsal view ovoid, dorsally sclerotized, and in lateral view long and narrow ( Fig. 13D–E View Fig ); articulatory apparatus in ventral view with basal plate arms relatively slender and jointly forming a V-shape, and in lateral view arched strongly ( Fig. 13D–E View Fig ); dorsal phallothecal sclerite in lateral view with posteromedian weakly produced ( Fig. 13E View Fig ); spoon-like sclerites dissipated ( Fig. 13D–E View Fig ); membranous sac-like lobes almost disappeared ( Fig. 13D–E View Fig ); distal dorsal lobe of endosoma round and weakly bulged, without any thorns or prickles ( Fig. 13D–E View Fig ).

VESTITURE. Body clothed with yellow setae. Head densely covered with short, slender, bent setae, interleaved with short, slender, erect setae; labium covered with short, slender, erect setae ( Fig. 11C–D View Fig ). Scape and pedicel covered with short, slender, sub-erect setae; remaining antennae covered with short, vertical setae, denser toward tip. Collar, anterolateral angles with tiny setae, somewhat interleaved with short, slender, erect setae; anterior pronotal lobe with some rows of tiny bent setae, somewhat interleave with slender, erect setae; posterior pronotal lobe covered densely with slender, erect setae; scutellum densely covered with short, slender, bent setae and interleaved with long slender erect setae ( Fig. 12A View Fig ). Coxae and trochanters covered with short, bent setae; femora, tibiae, and tarsi densely covered with long, slender, erect setae. Coria and clavus densely covered with short, bent setae. Abdominal mediotergites, laterotergites, and sternites covered with short, bent setae and slender, erect setae. Male genitalia pygophore ventrally and laterally densely covered with short and long setae ( Fig. 13A–C View Fig ); base of paramere almost glabrous, remaining part of paramere densely covered with short and long, thick, erect setae ( Fig. 13A View Fig ).

Measurements (all dimensions are given in mm)

Holotype ( ♂)

BL 20.49; HL 3.37; AoL 1.17; AoW 0.88; PoL 0.82; PoW 1.07; NL 0.77; OE 1.49; IE 0.67; ED 0.71; OD 0.19; OCD 0.52; COD 0.21; R1L 1.85; R2L 1.56; R3L 0.64; A1L 10.90; A2L 4.59; A3L 8.02; A4L 2.93; HSL 0.23; HSD 0.86; PnL 3.74; PnW 3.74; LPSD 5.36; APL 1.43; PPL 2.31; LPSL 1.06; CPSL 1.25; HeL 14.35; HeW 3.70; Sc 11.33; R+M 8.38; HWL 9.73; HWW 2.72; AFL 8.98; ATL 8.17; MFL 7.39; MTL 7.70; PFL 9.64; PTL 11.08.

Paratype ( ♂)

BL 19.16; HL 3.24; AoL 1.08; AoW 0.75; PoL 1.04; PoW 0.91; NL 0.59; OE 1.33; IE 0.67; ED 0.67; OD 0.18; OCD 0.49; COD 0.21; R1L 1.93; R2L 1.46; R3L 0.64; A1L 10.59; A2L 4.50; A3L 7.60; A4L 2.80; HSL 0.18; HSD 0.73; PnL 3.35; PnW 3.75; LPSD 5.12; APL 1.14; PPL 2.19; LPSL 1.04; CPSL 1.21; HeL 13.45; HeW 2.87; Sc 10.52; R+M 6.35; AFL 8.68; ATL 8.54; MFL 7.18; MTL 7.48; PFL 9.51; PTL 11.49.

Distribution

Vietnam ( Gia Lai & Thua Thien Hue provinces).