Manota biunculata, Hippa, Heikki, 2007

Hippa, Heikki, 2007, The genus Manota Williston (Diptera: Mycetophilidae) in Melanesia and Oceania, Zootaxa 1502, pp. 1-44 : 25-27

Manota biunculata sp. n.

( Figs 13 A, B)

A small-sized Manota .

Male. Coloration. Pale yellowish-brown, frons, vertex and occiput darker, mouthparts and legs slightly paler than thorax, wing unicolorous, hyaline, pale yellowish-brown, haltere yellowish-brown. Head. Antennal flagellomere 4, in the single specimen, seen in oblique ventral view and not illustrated, the lateral view apparently similar to Fig. 10 C. Palpomere 3 of maxillary palpus with apicomesial extension, with 5 apically expanded curved sensilla; palpomere 4 with parasegment. Thorax. Anepisternum setose, with 37 setae; anterior basalare non-setose; preepisternum 2 setose, with 9 setae; laterotergite setose, with 9 setae; episternum 3 setose, with 8 setae. Wing. Length 1.4 mm. Hypopygium ( Figs 13 A, B). Sternite 9 extending halfway between the base of gonocoxa and the base of gonostylus, laterally sharply delimited, posterior margin transversely straight, anterior margin deeply incised, setae similar to ventral setae of gonocoxa. Parastylar lobe exposed, with 1 transverse seta arising from a small lobe on its anterior part. Paraapodemal lobe exposed in ventral view. The dorsal mesial margin of gonocoxa simple, subapically with an aggregation of setae, mostly on ventral side. Two long apically curved juxtagonostylar megasetae present, arising from a large basal body, which is about half the length of megasetae. Gonostylus elongate, with long setae, dorsally also with short setae some of which are on a low subapical transverse crest. Tegmen broadly triangular, with weakly expressed shoulders. Hypoproct small, posteriorly extending to the level of the middle of gonocoxa, with ca. 7 ventral setae on each side in a rather tight anterolateral group. Cerci separate.

Female and preimaginal stages unknown.

Discussion. M. biunculata resembles M. gemella and M. tricuspis . It is distinguished from both by having two subequal juxtagonostylar megasetae, not one megaseta and a shorter normal seta, and by lacking a long apical lobe dorsally on gonocoxa, which is apicomesial in M. tricuspis and apicolateral in M. gemella . Furthermore, it differs from M. tricuspis by lacking the three huge setae apically on gonostylus and from M. gemella by lacking a small lobe in the middle of the mesial margin of gonostylus. M. biunculata is also similar to the Oriental M. orientalis Senior-White but differs by the same characters as M. gemella . M. biunculata resembles the Oriental M. angustata Hippa but differs e.g. by having the gonostylus much broader, 1/3 of the length instead of 1/5, by lacking a distinct subapical mesial lobe on the gonostylus, and by having the two juxtagonostylar megasetae subequal in size, not conspicuously unequal. M. biunculata also resembles the Oriental M. ovata Hippa but differs e.g. by having the mesial margin of gonostylus concave, not convex, by lacking a conspicuous fringe of long setae on this margin, and by lacking a distinct transverse lobe dorso-apically on the gonocoxa. The hypopygium of M. biunculata is not dissimilar to the Oriental M. calcarata Hippa , M. procera Hippa and M. transversa Hippa , but all these species have a long apicolateral lobe dorsally on the gonocoxa and a non-setose laterotergite.

Types. Holotype. Male, Papua New Guinea, Madang prov., Halopa village, primary rainforest, 600 m a. s. l., Malaise trap, November 2000, Lukáš Č iżek leg. (in NRM).

Figures

FIGURE 10. Manota spathula sp. n. (holotype): A. Hypopygium, dorsal view. B. Hypopygium, ventral view. C. Antennal flagellomere 4, lateral view. Scale for A and B 0.10 mm, for C 0.05 mm.

FIGURE 13. Manota biunculata sp. n.: A. Hypopygium, dorsal view. B. Hypopygium, ventral view. Scale 0.10 mm.