Ademula corniculata, Chen & Li & Cai, 2023

Chen, Zhuo, Li, Hu & Cai, Wanzhi, 2023, Two new species of Ademula McAtee & Malloch (Hemiptera: Reduviidae: Emesinae) from China with an updated key to the Oriental species, Raffles Bulletin of Zoology 71, pp. 702-712 : 706-710

Ademula corniculata , new species

( Figs. 4–6 )

Type material. Holotype (male): CHINA. Yunnan: Xishuangbanna, Mengla, Wangtianshu , 11 May 2009, Xiushuai Yang ( CAU) . Paratypes: CHINA. Yunnan: same collection data as holotype (1 male, 1 female, CAU) ; same locality as holotype, 15 April 2015, Hangrui Liu & Yisheng Zhao (1 male, 1 female, CAU) ; Xishuangbanna, Mengla, Bubeng , 11 May 2009, Hu Li & Liangming Cao (1 female, CAU) .

Diagnosis. Recognised within the genus by the following combination of characters: postocular region of head with small dorsal median process ( Fig. 5B, E, G ); antennal scape with dark brown subbasal and subapical annuli ( Fig. 4A, C, D, F ); posterior pronotal lobe with contrasting light and dark colour patterns ( Fig. 5A, D ); fore femur 10 times as long as its maximum width, with three broad dark annuli ( Fig. 5H ); mid and hind femora with one subapical broad dark annulus and three narrow additional ones ( Fig. 4A, C, D, F ); fore wing with nearly percurrent greyish brown to brown stripes ( Fig. 5I ).

DNA barcode. OQ571473.

Description. Macropterous male ( Fig. 4A–C ) and female ( Fig. 4D–F ). Colouration. Generally pale yellowish brown, with variable dark colour patterns. Head with lateral side of antennifer, anteclypeus, mandibular plate, gena and posterior half of postocular region dark brown ( Fig. 5A–F ). Antennal scape with extreme base, subbasal and subapical annuli, extreme apex dark brown; pedicel brown, with one subbasal light-coloured annulus, extreme base and apex slightly darker; flagellomeres pale brown. Labium with apical half of visible segments I and II dark brown, apical half of segment III brown ( Fig. 5B, C, E, F ). Pronotum yellowish brown to brown; anterior lobe with anterior margin, midline and lateral sides extensively dark brown to blackish brown; posterior lobe with anterior margin, midline, longitudinal stripes on anterior half and annular markings on posterior half dark brown ( Fig. 5A, D ). Prosternum with anterior margin and groove blackish brown. Scutellum (except spine-like process) blackish brown; mesopleuron blackish brown, with indistinct pale brown spot at middle; mesosternum dark brown, with large yellowish patch at middle (expect midline of posterior half). Metanotum dark brown, with midportion paler; metapleuron blackish brown, with posterior margin yellowish; metasternum dark brown, with large rounded yellowish patch at middle. Fore coxa with extreme base and medial annulus brown, apical annulus dark brown; trochanter brown; femur with extreme base as well as subbasal, medial and subapical annuli dark brown ( Fig. 5H ); tibia with two nearly contiguous subbasal annuli dark brown, apical half yellowish brown, medial annulus and apex brown ( Fig. 5H ). Mid coxa and trochanter, extreme base and three narrow annuli of mid and hind femora, subbasal annulus of mid and hind tibiae brown; subapical annulus of mid and hind femora dark brown; mid and hind tibiae pale yellowish brown basally, gradually darkened towards apex of segment, yellowish brown apically. Fore wing pale yellowish, with dark brown basal spots and nearly percurrent greyish brown to brown stripes ( Fig. 5I ). Abdominal tergite I blackish brown.

Vestiture. Body surface dull, densely covered with decumbent, short, whitish pubescence on head, thorax, legs and abdomen; head and thorax with a number of sparse, suberect to erect, long pubescence; antennal scape with many sparse, erect, long pubescence, pedicel and flagellomeres with dense, decumbent, very short pubescence; fore coxa, trochanter and femur with dense, suberect, relatively long pubescence; fore tibia with one row of decumbent, short setae on ventral surface.

Structure. Head ( Fig. 5A–G ) short, 1.05 (male) or 1.25 (female) times as long as width across eyes; anteocular region as long as postocular, anteriorly declivent, with antennifer elevated; postocular with small dorsal process at middle ( Fig. 5G ), lateral margin abruptly (male) or gradually (female) convergent. Eye ( Fig. 5A–F ) large, strongly protruding laterally, remote from ventral head margin in lateral view; width across eyes 3.5 (male) or 3.1 (female) times as broad as interocular space. Antennal scape nearly as long as pedicel, basiflagellomere 2.4 times as long as distiflagellomere. Labium ( Fig. 5B, C, E–G ) slender, strongly curved; visible segment I 1.6 times as long as segment II, reaching midpoint of eye; segment III nearly as long as segment I, tapering.

Pronotum ( Fig. 5A, B, D, E ) 1.1 (male) or 1.2 (female) times as long as width across humeral angles; anterior lobe short, about half as long as posterior lobe, with medial longitudinal furrow not reaching anterior margin, anterior margin weakly concave, lateral margin weakly convex; posterior lobe with rounded humeral angle, posterior margin broadly concave at midportion. Scutellum ( Fig. 5A, B, D, E ) short and wide, with erect spine-like process. Metanotum rounded apically.

Fore leg ( Fig. 5H ) relatively slender; coxa cylindrical, 0.6 times as long as femur; trochanter unarmed; femur subcylindrical, 10 times as long as its maximum width, 1.25 (male) or 1.3 (female) times as long as tibia, armed ventrally with two series of spiniferous processes; anteroventral series composed of a number of small processes; posteroventral series composed of five relatively large processes and a number of smaller ones; tibia slender and straight, slightly widened apically; tarsus short, tarsomere I subequal to combined length of tarsomeres II and III. Mid and hind legs long and slender; mid and hind tibiae 1.5 times as long as respective femur.

Fore wing ( Fig. 5I ) elongate, not reaching (male) or slightly surpassing (female) apex of abdomen in midline.

Abdomen elongate and slender. Abdominal tergite I with oblique spine-like process.

Male genitalia: Pygophore ( Fig. 6A, B ) elongate oval, apical half narrower, posteromedial process short, narrow, apically acute; transverse bridge wide. Paramere ( Fig. 6C–E ) short, curved, apically subpointed. Phallus ( Fig. 6F–H ) relatively elongate; articulatory apparatus wide, basal plate arms separated, basal plate bridge slender, dorsal connectives very short; phallotheca weakly sclerotised, tubular; vesica arms long and slender, gradually narrowing towards apex, apical parts filiform.

Female genitalia: Valvifer I wide, with truncated apex; valvula I small, apically blunt, with a number of long setae; styloids wide, slightly emarginated at midpoint.

Figures

Fig. 4. Ademula corniculata, new species, habitus: A–C, holotype, male; D–F, paratype, female. A, D, dorsal view; B, E, lateral view; C, F, ventral view. Scale bar = 3.0 mm.

Fig. 5. Ademula corniculata, new species: A–C, G–I, holotype, male; D–F, paratype, female. A–F, anterior part of body; G, head, showing dorsal process on postocular region; H, fore leg; I, fore wing. A, D, H, I, dorsal view; B, E, G, lateral view; C, F, ventral view. Scale bars: A–F, H = 1.0 mm; G = 0.5 mm; I = 1.5 mm.

Fig. 6. Ademula corniculata, new species, paratype, male genitalia: A, B, pygophore; C–E, paramere; F–H, phallus. A, F, dorsal view; B, G, lateral view; H, ventral view. Scale bar = 0.5 mm.