Helina nigriabdomilis Xue, 2014

Xue, Wanqi & Sun, Hongkui, 2014, Diagnosis and key for the Helina annosa-group (Diptera: Muscidae) from China, with descriptions of nine new species, Journal of Natural History 49 (25), pp. 1549-1583 : 1564-1566

Helina nigriabdomilis Xue , sp. nov.

( Figure 5A–D )

Type material

Holotype. One male ( IESNU), China, Mount Paoma , Sichuan Province, 30°02' N, 101°57' E, altitude 2600–3000 m, 5 July 2006, J.Y. Liu.

Paratypes. One male ( IESNU), same data as holotype .

Etymology

The specific name is based on abdomen with particularly large black patches.

Distribution

China, Sichuan Province, Mount Paoma.

Remarks

This new species is similar to H. plumipostitibia Feng and Xue, 2002a , but differs from it as follows: width of frons subequal to postpedicel in width; thorax with a little steel grey pruinosity; costal spine small and short; haltere brown, apex of haltere red orange; fore tibia with 3 pv in apical half; mid tibia without ad, p 5; tergite 5 with a pair of carbonarius patches in posterior half; sternite 5 narrow in basal part, broad in apical part, lateral lobe broad, surstylus shorter, outer protuberance of cercus subequal to inner protuberance in length.

Description (based on holotype)

Male. Body length 8.4–8.6 mm.

Head. Eyes with dense, long and orange hairs, frons subequal to postpedicel in width (about 3.0 times as broad as postpedicel); frontal vitta villi black, about 1.5– 2.0 times as broad as anterior ocellus (about 2.0–2.5 times as broad as frons); fr 7–8 pairs on lower three-fifths of frons, with hairs in the middle; ocellar seta strong, longer than the longest fr; fronto-orbital plate with dark orange pruinosity, parafacial with orange grey pruinosity; parafacial with silver flash patches in the pedicel level, about 1.5 times as broad as the middle part of antenna; antenna black; postpedicel broad towards apex, length about 3.0–3.5 times middle width; arista plumose, upper slightly longer than lower, subequal to or slightly longer than the middle part of antenna; lunule dark red; epistoma not protruding; vibrissal angle situated behind frontal angle; anterior margin of gena with 2–3 rows of upcurved setulae, genal and postgenal setulae black; gena with dark grey pruinosity, genal height about one-half of eye height; occiput with dark grey pruinosity, epicephalon with black hairs; prementum with dense and steel grey pruinosity, length about 2.2 times as long as height; labella large, posterior of labella extended in upward direction, distinctly longer than prementum; palpus black, about 1.2 times as long as prementum.

Thorax. Ground-colour black; arthropleuron with some steel grey pruinosity; scutum with slight orange grey pruinosity, with slight dark blue metal reflection, with 4 carbonarius pruinose vittae, the inner vitta reaching the middle of the postsutural area of scutum; prst acr about 4 rows, only a pair of acr distinct near scutoscutellar suture, dc 2+4, ial 0+2, pra hair-like, about three-fifths length of posterior notopleural seta, postpronotal setae 3, posthumeral seta 1+0; posterior notopleural setae with hairs around base; basal and apical scutellar setae strong, lateral scutellar setae 2 pairs, lateral surface of scutellum with hairs, ventral surface bare; basisternum of prosternum, proepisternum hollow in centre, anepimeron and katepimeron all bare; meron with many fine hairs; anterior anepisernal seta 1, anepisernal seta row without hairs between the first and the second, among other setae with fine hairs; katepisternal setae 2+2; anterior and posterior spiracles larger and dark brown; anatergite with orange hairs; greater ampulla bare.

Wing. Wing-base brown, basicosta yellow; subcostal sclerite with short and black hairs, costal spine small and short; Sc bow-shaped; radial node bare; R 4+5 and M straight, slightly diverging in distal part; cross-veins r-m and dm-cu distinctly clouded; calypter light orange, the lower calypter tongue-shaped protruding, margin of calypter orange, haltere brown, apex of haltere red orange.

Legs. Completely black; fore tibia with 3 pv in apical half; mid femur without distinct av, pv row complete, shorter towards apex, setae hair-like in apical half, 7–8 strong in basal part; mid tibia without ad, p 5, 2 of them slightly partial rear, all strong, the longest about one-third of the length of mid tibia; hind femur with 5–6 ad in apical one-third, without distinct pv; hind tibia with 1 row of pectinate av (about 8–9) in apical two-thirds, most of setae about 2.5–2.7 times as long as the diameter of hind tibia, ad 4, all strong, 1 median ad about one-third of hind tibia in length, without pd, 9–10 pv in apical two-thirds, 2–3 of pv setiform in super-medial, elongate towards apex, 1 d in pre-apical part, without pv in apical part; tarsi longer than tibiae, claws and pulvilli long, about 1.4 times as long as tarsomere 5, claws and pulvilli of fore and middle legs slightly short, subequal to the length of tarsomere 5.

Abdomen. Oval in dorsal view, ground-colour black, body hairs denser; most parts of tergites 1+2 black, tergites 3 to 5 with median and black vittae in anterior half, tergite 5 with a pair of carbonarius patches in posterior half, black patch on tergite 4 subquadrate, black patch on tergite 3 broad, width about 1.2 times length; tergites 3 to 5 posterior marginal setae complete, tergite 5 with 3–4 pairs of discal setae, tergite 4 with 2–3 pairs of discal setae, ventral surface of tergite 5 posterior marginal setae strong, cruciate in apical of terminalia; lateral of tergites 2 to 4 with a little grey pruinosity, slightly discoloured; sternite 1 with hairs, sternite 5 narrow in basal part, broad in apical part, lateral lobe broad, terminalia small, surstylus shorter, outer protuberance of cercus subequal to inner protuberance in length.

Female. Unknown.

Figures

Figure 5. Helina nigriabdomilis Xue, sp. nov. (A) Male, abdomen in dorsal view; (B) male, sternite 5 in ventral view; (C) male, cerci in posterior view; (D) male, terminalia in profile. Scale bars: A, 1 mm; B, 0.5 mm; C, D, 0.2 mm.