Manota vesca, Hippa & Saigusa, 2016

Hippa, Heikki & Saigusa, Toyohei, 2016, Notes on Oriental and East Palaearctic Manota Williston (Diptera, Mycetophilidae), with the description of seven new species, Zootaxa 4084 (3), pp. 377-390 : 386-388

Manota vesca sp. n.

Figs. 7 A–D

Male. The single specimen is very faded and the colors are difficult to discern. Colour. Head brown, face and clypeus paler brown. Mouthparts pale yellowish. Antenna brown. Thorax brown, preepisternum 2 (katepisternum) ventrally paler brown. Legs pale, yellowish or brownish, apex of hind coxa, hind trochanter and apical third of hind femur infuscated. Wing unicolorous pale brown; halter pale brown with darker brown knob. Abdomen brown. All the setosity pale, the thicker setae seeming darker than the finer setae and trichia. Head. Antennal flagellomere 4, Fig. 7 A . Palpomere 3 of maxillary palpus with apicomedial thumb-like extension, with 4 apically expanded curved sensilla; palpomere 4 with parasegment, palpomere 5 ca. 1.3 times longer than palpomere 5. Number of strong postocular setae 10–11. Thorax. Anepisternum setose, with 31 setae, anterior basalare setose, with 7 setae, preepisternum 2 non-setose, laterotergite setose, with 29 setae, episternum 3 setose, with at least 4 setae. Legs. Midtibial organ absent. Hind tibial organ absent. Wing. R1 meeting C well on the basal half of the costal margin; the sclerotized part of M2 not extending to the level of the tip of R1, wing length 1.6 mm. Hypopygium, Figs. 7 B– D : Sternite 9 laterally fused with gonocoxa, extending posteriorly near to the ventral posterior margin of gonocoxa, anterior margin with a v-shaped indentation, the setae similar to ventral setae of gonocoxa. Parastylar lobe subrectangular, with 2 strong setae posteromedially. Paraapodemal lobe not identifiable. Dorsomedial margin of gonocoxa simple, slightly sinuous; the whole posterior part of gonocoxa forms a broad lobe. The dorsal setosity of gonocoxa unmodified, mostly similar to ventral setosity, but becoming shorter posteriorly, at posteromedial angle with a few flattened setae deviating from the nearby setosity. At the dorsomedial margin of gonocoxa, on more ventral level, with a plate-like lobe bearing ca. 20 acute megasetae/strong setae on its margin and ventral side. One juxtagonostylar seta present, which is a weakly modified acute megaseta, arising from a basal body which is about one third of the length of the megaseta. Gonostylus elongate, basal half slightly broader than apical half, simple; the ventral side setose, dorsal side nonsetose, a long seta deviating from the other setosity on both the middle of the medial margin, and at the middle of the apical half of the ventral side, a few thickened apically curved setae on the apical margin. Aedeagus subtriangular, without lateral shoulder, with concave sides; the apex curved ventrally. Hypoproct large, posteriorly extending to the level of the middle of gonostylus, the ventral setae (sternite 10) scattered, ca. 15 in number on each half. Cerci medially separate, simple. Tergite 9 membranous.

Female unknown.

Discussion. Manota vesca belongs to a large world-wide group which have a setose anepisternum, anterior basalare and laterotergite, a nonsetose preepisternum 2, and the gonocoxa fused laterally with sternite 9 with the posterior margin near the level of the base of the gonostyli. In the Oriental region there are 13 species belonging to this group, and the nearby eastern Palaearctic and Oceanian regions each have three species. Manota vesca is not especially similar to any of these species. It is distinguished from all by its unusually long gonostylus with weakly modified setosity, and in having the posterodorsal part of the gonocoxa drawn into an unusually long lobe. The species may recall M. biloba and M. simplex due to the flattened setae posterodorsally on gonocoxa, but the placement of these modified setae is more basal in those two species. Otherwise the species are greatly different. In the key to Oriental Manota , M. vesca runs to couplet 22 leading to M. confixa Hippa , M. juncta Hippa and M. clausa Hippa. It differs from them in having the gonostylus ca. 4 times longer than broad instead of at most twice as long.

Etymology. The name is Latin, vesca , little, referring to the small size of the fly. Types. Holotype. Male, THE PHILIPPINES, Mindanao, Mt. Apo, Malaise trap, 3– 5. 8.1978, A. Nakanichi & O. Yata (in KMNH).

Figures

FIGURE 7. Manota vesca sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Hypopygium, ventral view. C. Hypopygium, dorsal view. D. Gonostylus, dorsal view. Scale 0.1 mm.