Ischiolepta baloghi, Papp, 2003

Papp, L., 2003, New Oriental Species And Records Of Sphaerocerinae And Copromyzinae (Diptera: Sphaeroceridae), Acta Zoologica Academiae Scientiarum Hungaricae 49 (1), pp. 71-85 : 72-73

Ischiolepta baloghi sp. n.

( Figs 1–4 )

Holotype male ( HNHM): India, Goomti , Darjeeling Distr. – No. 113, 20. II. 1980, leg. Topál

[abdomen with genitalia in a plastic microvial with glycerol].

Measurements in mm: body length 2.00, wing length 2.17, wing width 0.74.

Body dark, blackish brown, grey microtomentose. Head as long as high, lunule short but broad, inner vertical seta pale short, on a minute tubercle, outer vertical seta short, thick, proclinate, on larger tubercle. Three pairs oforbital tubercles with short setae just above eye: anterior one reclinate, middle one lateroclinate, posterior one proclinate. Epistoma (facial plate) pentagonal, upper triangle much higher than broad, basal part. Clypeus dark, about twice as broad as high, dull grey microtomentose. Supragena and infragena subshiny, rubbed shiny on the left side on holotype. Facial ridge with thick but only slightly flattened vibrissa 0.106 mm long, only short pale setae ventral to vibrissa. Eye round, globular.

Thorax rather short. Acrostichal setae anteriorly in 4 irregular rows, posteriorly in ca. 6 rows, dorsocentral rows distinctly though very narrowly separate from acrostichal rows, bare area between them microtomentose. Scutellum more than twice as broad as long with 8 scutellar marginal tubercles. Katepisternum with very sparse hairs ventrally (unfortunately in glue on the holotype).

Legs as dark brown as thoracic pleura. Fore coxa yellowish brown laterally, mid and hind coxae and bases of mid and hind femora yellowish. Male femora not much thickened, fore femur 0.138 mm thick, hind femur without a tubercle, 0.112 mm thick at thickest, i.e fore femur 1.23 times as thick as hind femur, hind femur and tibia almost straight, not bent dorsally. Ventral spur on apex of hind tibia thick black but only halfas long as diameter oftibia subapically.

Wings not hyaline but light brownish, veins light brown. Knob ofhalteres ochre.

Preabdomen strongly sclerotized dark brown. Male tergite 1+2 large, almost twice as long as T3, T4 slightly longer than T3, tergite 5 symmetrical, ca. 4 times as broad as long, and less than 1/2 of length ofT4, medially without the slightest sign ofweakening. All sternites shorter than broad with a pair ofblunt marginal setae, sternite 4 halfas long as broad, sternite 5 slightly asymmetrical and as long and halfas broad as tergite 5.

Male terminalia ( Figs 1–4 ) and postabdomen comparatively short but broad. Hypandrium normal. Periandrium (ofR OHÁČEK & PAPP 1984, in all probability ventral/posterior part ofepandrium, cf. ROHÁČEK 1998: 465) in two lateral parts ( Fig. 1 ), trapezoidal with 1 long seta, partly fused with cerci (pseudocerci ofR OHÁČEK & PAPP 1984). Cerci basally broad, projecting downward to about middle ofsurstyli, apically much narrowed but not pointed, subapically with a pair oflong but not thick setae, otherwise with a number ofmedium-long setae. Surstylus ( Fig. 2 ) without from medially to anterally torn part on caudal edge as in I. pusilla . Surstylus in broadest extension broadly rounded apically but not narrow even basally, slightly asymmetrical (at least on the holotype, Fig. 1 ), lateral surface with several long and medium-long setae, medial surface with even more medium-long setae. Postgonite ( Fig. 4 ) very characteristic with its long, curved, but apically blunt apical process, and comparatively slender, almost unarmed basal process. Apical process with two short subapical and one longer submedial setae. Distiphallus ( Fig. 3 ) in contrast to I. pusilla , with no apical tubuliform processes, its sclerotized pair ofprocesses comparatively thin and very asymmetrical.

Female unknown.

Ischiolepta baloghi sp. n. runs to the species group of I. pusilla in the key of HAN and KIM (1990): thoracic dorsum normal, body not as small as in scabricula or minuscula, outer vertical seta small and sitting on a small tubercle, mesonotal setae originate on very weak tubercles, epistoma and clypeus dark, genal area not distinctly granulated, mesonotum microtomentose, male hind femur without a small ventral tubercle, and acrostichals in 4 or more irregular rows. Its male genitalia are characteristic with a broad surstylus, a distiphallus ( Fig. 3 ) with no apical tubuliform processes, and a pair of comparatively thin, very asymmetrical sclerotised processes, only one ofwhich is hooked upwards. Its postgonite is markedly different from that of both I. pusilla and I. vaporariorum .

Etymology. This species is dedicated to the honour ofthe late Professor J ÁNOS BALOGH, master ofgenerations in Hungarian zoology, incl. both the collector and the author ofthis new species. gonite, widest (nearly lateral) view. Scales: 0.2 mm for Figs 1, 3 , 0.1 mm for Figs 2, 4

Figures

Figs 1–4. Ischiolepta baloghi sp.n., holotype male, genitalia:1 =terminalia caudally with caudal end ofright hypandrial arm, 2 = surstylus, broadest extension, 3 = distiphallus, lateral view, 4 = post -