Geranomyia kunashir, Podenas, Sigitas, 2016

Podenas, Sigitas, 2016, New Geranomyia crane flies (Diptera: Limoniidae) from Korea and Kunashir Island, Zootaxa 4121 (5), pp. 555-565 : 561-564

Geranomyia kunashir n. sp.

Figures 12–15

Etymology. The species is named after Kunashir Island, where it was collected.

Holotype, male (pinned). RUSSIA, Kunashir Island, cape Lechebnyi, N43.98333, E145.79167, 1989.08.0 4.

Diagnosis. Large Geranomyia with wing nearly reaching 13 mm. Head and abdomen dark brown, thorax light, brownish yellow. Antennal flagellum serrate. Head with long projection above antennal base. Wing with four small but distinct brown spots: at supernumerary cross-vein in cell sc, at both ends of Rs and at apex of R1. Vein Sc very short, reaching slightly beyond base of Rs, R3 and R4+5 strongly arched. Pleuron light, brownish yellow with blackish spot behind cervical sclerite. Male genitalia with nearly straight outer gonostylus, that is arched only at apex. Rostral prolongation of inner gonostylus long and armed with two long spines starting from separate tubercles. Penis very long and narrow.

Description ( Figs. 12 – 15 ). Adult, male (N =1). Body length 8.65 mm. Wing length 12.75 mm. Head ( Fig. 13 ): dark brown to black, densely covered with gray pruinosity. Pruinosity intense along eye margin. Sparse erect dark brown setae cover dorsal part of head, setae on ventral side twice as short as on dorsal. Vertex medium wide. Long, distinct setose projection protrudes above antennal base approximately as long as scape. Antenna 2.10 mm long ( Fig. 15 ). Scape cylindrical, dark brown with narrowly light brown distal part, covered with few semi-erect setae dorsally. Pedicel narrower basally, wider distally, light brown at both ends, dark brown at middle. Flagellum 12- segmented, distinctly serrate, dark brown. Flagellomeres distinctly extended ventrally, less so basal and apical segments, with distinct apical pedicels. Basal two flagellomeres armed with four strong short spines on ventral surface, remaining segments with two spines. Dorsal side of flagellomeres covered with semi-erect setae at most 1.5 times as long as respective segments. Apical flagellomere with swollen dark brown basal part and narrow light brown distal end, 1.7 times as long as preceding segment. Very short pubescence, covering segments, grayish. Rostrum semi-polished, dark brown with blackish stripe laterally, elongate, length slightly exceeds length of head. Mouth parts dark brown to blackish, tips whitish, approximately as long as rostrum and head together. Rostrum together with mouth parts 2.9 mm long. Palpus situated on small tubercle. Palpus with reduced basal segment, second and third segments elongate, nearly cylindrical, apical segment very small, indistinct. Palpomeres black, covered with short blackish setae. Thorax: brownish yellow. Cervical sclerites blackish. Pronotum brownish. Mesonotal prescutum brownish yellow with four indistinct longitudinal stripes. Median stripes separated by narrow vitta. Lateral stripe situated behind pseudosutural fovea, extending onto scutal lobe, scutal lobe pale brownish laterally and posteriorly. Scutellum and mediotergite brownish yellow with paler margins. Pleuron uniformly brownish yellow, with blackish spot behind cervical sclerite. Wing ( Fig. 12 ) clear with yellowish costal area, four small, distinct spots: at supernumerary cross-vein in cell sc, at both ends of Rs and at apex of R1. Indistinct darkenings along cord and at distal margin of discal cell. Stigma absent. Veins brownish, frontal margin yellowish. Venation: Vein Sc very short, Sc1 reaching slightly beyond base of Rs. R2 oblique, at tip of R1. R3 and R4+5 strongly arched. Vein r-m distinct. Discal cell 2.3 times as long as wide. Free end of M1+2 slightly exceeds its basal part forming frontal margin of discal cell. Basal deflection of CuA1 beyond branching point of M. Both anal veins long, nearly straight. Anal angle big, posterior margin widely rounded. Halter 1.35 mm long, stem brownish yellow, base pale, knob brownish. Coxae and trochanters yellow, frontal face of fore coxa with brownish spot. Distal margin of trochanter narrowly rimmed with black. Abdomen: tergites dark brown with grayish posterior margins, dusted with sparse pruinosity. Three frontal tergites with yellow spot at middle. Sternites whitish yellow, posterior sternites brown posteriorly and laterally. Male terminalia ( Fig. 14 ) light brown. Posterior margin of ninth tergite straight, lateral parts slightly raised and setose. Gonocoxite elongate, bearing large setose ventro-mesal lobe. Outer gonostylus strongly sclerotized, straight with slightly arched darkened apex. Inner gonostylus oval, bearing large rostral prolongation armed with two long spines originated from separate tubercles. Tip of rostral prolongation slightly curved frontally. Paramere wide at base, distal part extended into narrow lobe. Penis very long and narrow.

Female unknown.

Period of activity. Single specimen was captured at the beginning of August.

Distribution. Kunashir Island.

Discussion. Geranomyia kunashir n. sp. is distinct among Geranomyia . The large elongate protuberation on the head is very unusual for all crane flies. Only G. cornuta Hancock, 2011 from United Arab Emirates has a short conical projection, but it is very small in comparison with that of G. kunashir n. sp. All Geranomyia have simple flagella, but that of G. k u n a s h i r n. sp. is distinctly serrate, armed with strong spines on the ventral surface. Vein Sc usually is long, reaching far beyond base of Rs, but is short in G. kunashir n. sp. Veins R3 and R4+5 are nearly straight, or slightly diverging at the wing margin in most Geranomyia , but they are strongly arched in G. k u n a s h i r n. sp. The wing venation of G. kunashir n. sp. resembles that of G. dybasi ( Alexander, 1972) from Micronesia and Palau islands, except distinctly different R2, but male genitalia of both species are very different, especially ninth tergite.

Figures

FIGURES 12 – 15. Geranomyia kunashir n. sp. 12: General view of holotype; 13: Head, lateral view; 14: Male genitalia, dorsal view; 15: Antenna.