Manota chelapex, Hippa, Heikki, 2009

Hippa, Heikki, 2009, New species and new records of Manota Williston (Diptera, Mycetophilidae) from Thailand, Zootaxa 2017, pp. 1-33 : 4-8

Manota chelapex sp. n.

Figs 3 A, B, C

Male. Colour. Head pale brown, frons, vertex and dorsal part of occiput darker brown. Antenna brown, scapus, pedicellus, and flagellomeres 1–2 pale brown ventrally. Mouthparts pale yellowish. Thorax pale brown, dorsomedially darker brown, on scutum the darker colour widening towards posterior margin. Legs unicolorous pale yellowish. Wing unicolorous greyish-brown; haltere yellowish-brown with dark brown knob. Abdomen brown. All the setosity pale, yellowish or brownish, the thicker setae seeming darker than the finer setae and trichia. Head. Antennal flagellomere 4, Fig. 3 A. Palpomere 3 of maxillary palpus with apicomesial extension, with 2 apically expanded curved sensilla; palpomere 4 with parasegment. Number of strong postocular setae ca. 11. Thorax. Anepisternum setose, with 29 setae, anterior basalare setose, with 4 setae, preepisternum 2 setose, with 17 setae, laterotergite non-setose, episternum 3 setose, with ca. 5 setae. Wing. Length 1.7 mm. Hypopygium, Figs 3 B, C: Sternite 9 very long, extending to the middle of gonostylus, lateral margin sharply delimited, the sides converging to a sclerotized narrow posterior process, anterior margin with a rather shallow incision, the setae similar to the adjacent ventral setae of gonocoxa. Ventral mesial margin of gonocoxa unusual, with a triangular non-setose plate-like lobe at the margin of sternite 9 and partly covering the base of a large postero-mesad directed non-setose lobe. Parastylar lobe long, almost as long as the gonostylus, with two or three apical setae. Paraapodemal lobe distinct ( Fig. 3 C), in ventral view covered by the mesial lobes of gonocoxa and the parastylar lobe. Dorsal mesial margin of gonocoxa simple. Two juxtagonostylar setae present, of these one is an unmodified seta, the other a slightly sigmoid strong megaseta, both arising from a common basal body which is about one-fourth of the length of the megaseta. Gonostylus rather small, with a broad basal half and a narrow apical half, the sparse normal setosity on ventral and dorsal side largely restricted to basal half of gonostylus, a conspicuous long seta subapically on the lateral margin, at apex a group of ca. 4 closely-placed megasetae which are directed mesad. Aedeagus elongate-subtriangular, without distinct lateral shoulders, in the single mount extending posteriorly as far as apex of gonostylus and further than hypoproct, its apical part unusually broad and parallel-sided, vas deferens terminating rather far basad from the apex without any conspicuous orifice. Hypoproct extending posteriorly nearly to the apex of gonostylus, with ca. 12 evenly distributed setae on each half. Cerci mesially separate.

Female unknown.

Discussion. M. chelapex is not similar to any other described Manota , but is reminiscent in some characters of M. tunoi Hippa and Kjaerandsen from the Ryukyu Islands: both species have a laterally well delimited unusually long sternite 9 and a large lobe arising from the ventral mesial margin of gonocoxa. M. chelapex differs from M. tunoi e.g. by the following characters: 1) there is a narrow finger-like sclerotized process postero-medially on sternite 9; 2) the parastylar lobe is very long, as long as the gonostylus, not short, almost rudimentary; 3) the apical part of the aedeagus is simple and the vas deferens terminates far basad of the apex, whilst in M. tunoi there is a pair of apico-lateral lobes and the vas deferens terminates in a small process medially between the lobes; 4) the gonostylar megasetae are in an apical group, whilst in M. tunoi there is one apical megaseta and three longitudinal comb-like rows of ca. 10 megasetae on the apical half of gonostylus, one of the rows being ventral, one lateral and one dorsal in position. A long sternite 9, which extends posteriorly to the level of the base of gonostyli, is not uncommon in Manota (e.g. Fig. 7 B), but in these cases it is laterally fused with the gonocoxa.

Etymology. The name is formed from Greek chele or Latin chela, claw, and Latin apex, tip, and refers to the claw-like megasetae at the tip of gonostylus.

Types. Holotype. Male, THAILAND, Sakon Nakhon, Phu Phan NP, dry Dipterocarpus forest at foothill forest unit, 17o9.921’N 103o54.485’E, 206 m, Malaise trap 6–13.x.2006, Winlon Kongnara leg., T699 (in QSBG).

Figures

FIGURE 3 Manota chelapex sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Hypopygium, dorsal view. C. Hypopygium, ventral view. Scale 0.10 mm.

FIGURE 7. Manota obtecta sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Hypopygium, dorsal view. C. Hypopygium, ventral view. Scale 0.10 mm.