Manota apentachaeta, Kurina, Olavi & Hippa, Heikki, 2015

Kurina, Olavi & Hippa, Heikki, 2015, A review of the South Pacific Manota Williston (Diptera, Mycetophilidae), with the description of thirteen new species, Zootaxa 4020 (2), pp. 257-288 : 264

Manota apentachaeta sp. n.

Figs 4 A–E

Male. Colour. Head brown, face somewhat paler. Antenna including scape and pedicel brown. Clypeus and mouthparts pale yellowish. Thorax brown, medial part of scutum and scutellum darker. Legs yellowish, hind coxa basally infuscated, basal third of mid and apical fourth of hind femora infuscated. Wing hyaline; haltere yellow with brown knob. Abdomen dark brown, except tergites laterally and sternites somewhat lighter. All setosity pale, yellowish or brownish, the thicker setae seeming darker than the finer ones. Head. Antennal flagellomere 4 Fig. 4 A. Palpal segment 3 of maxillary palpus with apicomedial thumb-like extension, with four apically flattened and curved sensilla; palpal segment 4 with parasegment; palpal segment 5 ca. 1.5 times longer than palpal segment 4. Ten strong postocular setae. Thorax. Anepisternum with 43–46 setae; anterior basalare non-setose; preepisternum with 8 setae; laterotergite with 20 setae; metepisternum with 10 setae. Legs. Mid- and hind tibial organs absent. Wing. R1 meeting C within the basal half of the costal margin; the sclerotized part of M2 proximally not extending to the level of the tip of R1; wing length 2.1 mm. Hypopygium, Figs. 4 B–E. Sternite 9 elongate subquadrangular, about half the ventral length of gonocoxa, laterally free from gonocoxa, anteriorly deeply incised, the setae similar to the ventral setae of gonocoxa, the posterior most ones slightly thicker than the others. Ventromedial margin of gonocoxa simple, sigmoid, slightly angular at the paraapodemal lobe. The ventral setae of gonocoxa unmodified. Parastylar lobe angled, with a smaller longitudinal lateral (basal) part and a larger transverse medial (apical) part, the latter with ~6 setae distributed on both sides, the apical seta is different from the others in being long and straight. Paraapodemal lobe well developed and seen in the ventral view. Dorsomedial margin of gonocoxa simple, rather straight, with a sparse stripe of short setae beyond the middle; the apicomedial corner of the gonocoxa with a large oblique lobe bearing ~15 setae at its medial and apical margin. The dorsal setosity of gonocoxa similar to the ventral one except one longer seta posteriorly. Gonostylus about half of the ventral length of gonocoxa, anteroposteriorly elongated, with convex lateral and concave medial surface, at the apex with a long megaseta, other setosity unmodified, confined on lateral/ventral part with a few very long setae on medial margin; the microtrichia on the medial surface long and conspicuous. Two juxtagonostylar setae present, a shorter unmodified seta and a longer apically curved megaseta, both arising from a common basal body that is about half of the length of the megaseta. Aedeagus subtriangular, with weak lateral shoulders, the apex curved ventrad, in Fig. 4 E the basal part is shown shortened. In the holotype the hypoproct, aedeagus and cerci are pushed anteriad so that their normal position in relation to gonocoxa and gonostyli cannot be seen. The ventral part of hypoproct (sternite 10) with ~15 scattered setae on each half. Cerci partly separated by a medial low U-shaped notch, and have apical and lateral setae.

Female unknown.

Discussion. Manota apentachaeta belongs to a large group of species as defined under M. acris . Manota apentachaeta is distinguished from all of these in having the parastylar lobe two-lobed, with a smaller longitudinal non-setose part and larger transverse setose part. The latter has an oblique straight apical seta that is unique to this species. Except for details of the parastylar lobe, the hypopygium of M. apentachaeta strongly resembles that of M. pentachaeta . However, the two species differ remarkably in the shape of their antennal flagellomere 4. That is, in M. apentachaeta , only slightly longer than broad instead of being almost twice as long as broad as in M. pentachaeta .

Etymology. The species name is derived from the name of Manota pentachaeta by the Greek prefix a- [not] referring to the close similarity of the two species.

Types. Holotype. Male, PAPUA NEW GUINEA, SE, Koroba, 40 km W of Tari, 1650 m, light trap, 18.ix.1963, R. Straatman (BPBM).

Figures

FIGURE 4. Manota apentachaeta sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Hypopygium, dorsal view. C. Hypopygium, ventral view. D. Gonostylus, dorsal view. E Hypoproct and aedeagus, ventral view. Scale 0.1 mm.