Griphophanes chaetifemoratus, Naglis, Stefan & Grootaert, Patrick, 2012

Naglis, Stefan & Grootaert, Patrick, 2012, Review of the genus Griphophanes Grootaert & Meuffels (Diptera, Dolichopodidae), with the description of ten new species from Sri Lanka, Zootaxa 3525, pp. 51-64 : 58

Griphophanes chaetifemoratus sp. nov.

( Figs. 7 A–B)

Material examined. SRI LANKA. HOLOTYPE 3: “ Ceylon, Centr. Prov., Rangala, Knuckle Mnts., 12 mls ENE Kandy, 11.III.62, Loc. 130”, “Swept above surface of small stream” ( ZMLU).

Diagnosis. Ac biseriate; first flagellomere higher than long; legs entirely dark brown, except trochanters yellowish brown; halter yellow; fore and mid femur with strong ventral setae, longer than diameter of femur; fore tibia swollen and curved apically, with very long and strong ad seta, and small branched setae; fore basitarsus compressed laterally.

Description. Male: Length (holotype): body 1.8 mm, wing 2.0 mm. Head: Frons velvet black, with dense brownish pruinosity; eyes converging below antennae and almost contiguous; palpus black, with a small spine-like apical seta; antenna dark brown, first flagellomere ovate, higher than long; lower postoculars black. Thorax: Mesonotum and scutellum dark metallic green, with dense brownish pruinosity; 5 strong dc; ac biseriate; scutellum with 2 strong marginal setae and 2 small lateral setae; pleura dark brown shining. Legs: Entirely dark brown, but trochanters yellowish brown. Fore leg: coxa with anterior setae; femur with av and pv row of strong setae on entire length, longer than diameter of femur; tibia slightly swollen and curved apically, with 1 strong and very long ad seta at 1/3; with row of small ad setae which are branched apically; with some curved ventral setae, and strong curved apicoventral seta; basitarsus compressed laterally, with small spine-like ventral setulae; tarsomeres 2 and 3 compressed and shortened; tarsomere 5 with 2 strong dorsal setae; relative podomere ratios: 46, 44, 13/7/6 /9/10. Mid leg: coxa with some anterior setae; femur with 1 very small anterior preapical seta, and a ventral row of 6–7 strong setae on basal 2/3, longer than diameter of femur; tibia with 1 strong and long ad seta at 1/3, 1 smaller pd seta at 1/4, and 3 small apical setae; relative podomere ratios: 55, 62, 25/13/10 /7/8. Hind leg: coxa with 1 strong lateral seta; femur with very small anterior preapical seta, and 2 apicoventral setae; tibia with 1 strong sinuous dorsoapical seta, and 1 apical seta ventrally; relative podomere ratios: 62, 67, 17/ 22/13/9 /7. Wing: Hyaline, with grayish tinge; R4+5 and M subparallel; CuAx ratio: 0.75; RMx ratio: 1.7; lower calypter dark brown with fan of dark brown setae; halter yellowish brown. Abdomen: Dark metallic green, with brownish pruinosity; segments 6 and 7 ochreous brown, segment 8 dark brown; hypopygium entirely dark brown. Hypopygium ( Figs. 7 A–B): hypandrium basally broad, with tapering and curved left arm; epandrial lobe ovate, with small apical and long subapical seta; ventral lobe of surstylus triangular, with curved subapical seta; dorsal lobe of surstylus triangular, with small spinelike apical seta and additional small setulae; postgonite narrow, with long dorsal seta; cercus ovate. Female: Unknown.

Etymology. The name refers to the conspicuous setation on fore and mid femur.

Remarks. The reduction of the anterior preapical setae on mid and hind femora in this species is remarkable.

Figures

FIGURE 7. Griphophanes chaetifemoratus sp. nov. male genitalia: (A) hypopygium, left lateral view; cer = cercus; dsur = dorsal lobe of surstylus; epl = epandrial lobe; pgon = postgonite; vsur = ventral lobe of surstylus; (B) hypandrium, ventral view (scale bar = 0.1 mm).