Ademula callipennis, 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 : 703-706

Ademula callipennis , new species

( Figs. 1–3 )

Type material. Holotype (male): CHINA. Tibet: Nyingchi, Medog, Hanmi , 2,250 m, 14 August 2015, Zhuo Chen & Jianyun Wang, by light trap ( CAU).

Additional specimen examined. CHINA. Tibet: Nyingchi, Medog, Hanmi , 6 August 2011, Jianyun Wang & Hailin Yang (1 sex-unspecified ex. due to abdomen missing, CAU, in ethanol) .

Diagnosis. Recognised within the genus by the following combination of characters: head wider than long ( Fig. 2A ); anterior pronotal lobe blackish brown, posterior pronotal lobe dark brown with one pair of longitudinal orangish stripes ( Fig. 2A ); metanotum with small erect process ( Fig. 2A, B ); fore femur 12 times as long as its maximum width, with three broad dark annuli ( Fig. 2D ); mid and hind femora each with one subapical dark annulus only ( Fig. 1A, C ); posteromedial process of pygophore wide, flattened, lamelliform ( Fig. 3A–C ); phallotheca with highly-elevated dorsal crest-like sclerotisation ( Fig. 3H ); vesica arms short and relatively thick ( Fig. 3G–I ).

DNA barcode. OQ571472.

Description. Macropterous male ( Fig. 1 ). Colouration. Generally blackish brown. Anteocular region of head with dorsolateral orangish spot. Antennal scape blackish brown basally, gradually lightened towards apex of segment, yellowish brown apically; pedicel yellowish brown; flagellomeres pale brown. Labium with apical half of visible segments I and II as well as segment III yellowish brown. Pronotum with posterior lobe dark brown, with paired longitudinal stripes on disc and lateral carina orangish, lateral and posterior margins yellow ( Fig. 2A, B ). Proepisternum, proepimeron, spine-like process of scutellum and metanotum, mesepimeron, posterior margin of meso- and metapleura yellowish brown. Fore coxa with basal third and medial annulus yellowish brown; femur with medial and submedial annuli as well as apex yellowish brown, subbasal annulus pale brown, indistinct ( Fig. 2D ); tibia yellowish brown, with subbasal, submedial and medial annuli as well as apex dark brown ( Fig. 2D ); tarsus yellowish brown. Mid leg yellowish brown, with coxa, trochanter, extreme base and subapical annulus dark brown. Hind leg yellowish brown, with coxa, trochanter and extreme base of femur pale brown, subapical annulus of femur dark brown. Fore wing pale yellowish, with blackish basal spots, numerous dark spots and areas in characteristic arrangement ( Fig. 2E ).

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. 2A–C ) short and wide, 0.95 times as long as width across eyes; anteocular region as long as postocular, anteriorly declivent, with antennifer elevated. Eye ( Fig. 2A–C ) large, strongly protruding laterally, remote from ventral head margin in lateral view; width across eyes 3.2 times as broad as interocular space. Antennal scape slightly longer than pedicel, basiflagellomere 2.3 times as long as distiflagellomere. Labium ( Fig. 2B, C ) slender, strongly curved; visible segment I 1.6 times as long as segment II, reaching midpoint of eye; segment III 1.4 times as long as segment II, tapering.

Pronotum ( Fig. 2A, B ) 1.2 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 nearly straight; posterior lobe with rounded humeral angle, posterior margin broadly concave. Scutellum ( Fig. 2A, B ) short and wide, with oblique spine-like process. Metanotum ( Fig. 2A, B ) with small erect process.

Fore leg ( Fig. 2D ) relatively slender; coxa cylindrical, about half as long as femur; trochanter unarmed; femur subcylindrical, 12 times as long as its maximum width, 1.2 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, 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 1.6 times as long as respective femur.

Fore wing ( Fig. 2E ) elongate, surpassing apex of abdomen in midline.

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

Male genitalia: Pygophore ( Fig. 3A, B ) elongate oval, apical half narrower; posteromedial process wide, flattened, lamelliform ( Fig. 3C ); transverse bridge wide. Paramere ( Fig. 3D–F ) slender, straight on basal two thirds and curved on apical third. Phallus ( Fig. 3G–I ) stout; articulatory apparatus wide, basal plate arms separated, basal plate bridge slender, dorsal connectives very short; phallotheca weakly sclerotised, with highly-elevated dorsal crest-like sclerotisation; vesica arms relatively thick, gradually narrowing towards apex, with tiny serrate-like denticles on apical fourth.

Female unknown.

Measurements [in mm, male (n = 1)]. Length of body: to apices of forewings 8.40, to apex of abdomen 7.90; length of head 0.75; length of anteocular region 0.20; length of postocular region 0.20; width across eyes 0.80; interocular space 0.25; length of antennal segments I–IV = 4.80, 4.60, 1.60, 0.70; length of visible labial segments I–III = 0.40, 0.25, 0.35; length of pronotum 1.20; length of anterior pronotal lobe 0.40; length of posterior pronotal lobe 0.80; maximum width of anterior pronotal lobe 0.55; maximum width of posterior pronotal lobe 1.00; length of fore coxae, femora, tibiae, tarsi = 1.20, 2.40, 2.00, 0.30; maximum width of fore femora 0.20; length of mid femora, tibiae, tarsi = 4.60, 7.40, 0.30; length of hind femora, tibiae, tarsi = 6.20, 10.00, 0.30; length of forewings 6.30; length of abdomen 5.10; maximum width of abdomen 0.80.

Etymology. The specific epithet is derived from Latin calli- (meaning beautiful) and -pennis (meaning wings), referring to the impressive yellow and dark brown colour patterns on the fore wing of this new species. The specific epithet is an appositive noun.

Distribution. China — Tibet: Nyingchi (Medog).

Bionomics. The holotype of this new species was collected by a light trap.

Comparative notes. Among the Asian species of the genus, A. callipennis , new species, is mostly similar to A. aemula Rédei, 2005 (from China) by having relatively large body size and darker colouration, and their fore femur is 12 times as long as its maximum width and has three dark annuli. The new species differs from the latter by the following characters: head wider than long (vs. longer than wide in A. aemula ); pronotum with anterior lobe uniformly blackish brown, posterior lobe dark brown with one pair of longitudinal orangish stripes (vs. pronotum brown with medial longitudinal dark brown stripe, anterior lobe darkened on both sides in A. aemula ); metanotum with a small erect process (vs. lacking such process in A. aemula ); fore femur dark-coloured at base, light-coloured parts between dark annuli narrow (vs. fore femur light-coloured at base, light-coloured parts between dark annuli wide in A. aemula ); fore tibia with three dark annuli on basal half (vs. with one subbasal dark annulus only in A. aemula ); mid and hind femora with subapical dark annulus only (vs. with subapical dark annulus and two incomplete additional annuli in A. aemula ); different colour patterns on fore wing; posteromedial process of pygophore wide, flattened, lamelliform (vs. short, narrow, spine-like in A. aemula ); paramere slender (vs. ovally widened on apical half and narrowed distally in A. aemula ); phallotheca with highly-elevated dorsal crest-like sclerotisation (vs. such sclerotisation much lower in A. aemula ); vesica arms short and thick (vs. long and slender in A. aemula ).

Figures

Fig. 1. Ademula callipennis, new species, holotype, male, habitus. A, dorsal view; B, lateral view; C, ventral view. Scale bar = 3.0 mm.

Fig. 2. Ademula callipennis, new species, holotype, male: A–C, anterior part of body; D, fore leg; E, fore wing. A, D, E, dorsal view; B, lateral view; C, ventral view. Scale bars = 1.0 mm.

Fig. 3. Ademula callipennis, new species, holotype, male genitalia: A, B, pygophore; C, projection on superoposterior margin of pygophore; D–F, paramere; G–I, phallus. A, C, G, dorsal view; B, H, lateral view; I, ventral view. Scale bar = 0.5 mm.