Manota evexa, Hippa, Heikki, 2007

Hippa, Heikki, 2007, The genus Manota Williston (Diptera: Mycetophilidae) in Melanesia and Oceania, Zootaxa 1502, pp. 1-44 : 36-38

Manota evexa sp. n.

( Figs 19 A–C)

A small-sized Manota

Male. Coloration. Pale yellowish-brown but face, frons, vertex and occiput blackish-brown, mouthparts and legs paler than thorax, wing unicolorous pale yellowish-brown, knob of haltere blackish-brown. Head. Antennal flagellomere 4, Fig. 19 C. Palpomere 3 of maxillary palpus with apicomesial extension, with 4–5 apically expanded curved sensilla; palpomere 4 with parasegment. Thorax. Pleural setosity pattern similar to M. bicuspis , Fig. 1 E: anepisternum setose, with 36–46 setae; anterior basalare non-setose; preepisternum 2 setose, with 20 setae; laterotergite setose, with ca. 17 setae; episternum 3 setose, with 3–4 setae. Wing. Length 1.3–1.4 mm. Hypopygium ( Figs 19 A, B). Sternite 9 extending posteriorly to halfway between base of gonocoxa and base of gonostylus, laterally sharply delimited, posterior margin convex, anterior margin deeply incised, the setae similar to ventral setae of gonocoxa, posterolaterally stronger than on other parts. Parastylar lobe well exposed in ventral view, as a small membraneous tubercle with a sclerotized plate at apex, with three transversely directed setae. Paraapodemal lobe distinct and exposed in ventral view, not shown in Fig. 19 B, similar to M. parilis , Fig. 18 A. The dorsal mesial margin of gonocoxa convex in the middle without giving the impression of being a lobe, and apically with a triangular lobe, which is setose along the mesial margin. Two juxtagonostylar setae present, an apically curved megaseta and a rather weak seta, both arising at the apex of a common basal body, which is nearly as long as the megaseta. Gonostylus laterally flattened with the dorsal and ventral surfaces rather narrow, in lateral view the gonostylus apparently slightly longer than high, but the character cannot be seen precisely in either of the two specimens; setae on dorsal, lateral and ventral surfaces mostly similar to ventral hairs of gonocoxa but becoming longer towards the apex, and with a conspicuous row of ca. 7 long setae at the ventral mesial margin; at the apical margin of gonostylus with a mesially directed megaseta on dorsal part, but apparently no additional setae diverging from the other setosity; the mesial surface of gonostylus with a few setae basally, with long microtrichia. Tegmen triangular, with weakly indicated lateral shoulders. Hypoproct posteriorly extending to the level of the base of gonostylus, with ca. 15 long scattered ventral setae on each half in the holotype, ca. 7 in the specimen from Madang province. In the holotype the cerci seem medially united, apically separated only by a notch between them, in the specimen from Madang province each cercus seems to have a long free mesial margin, the difference possibly because the cerci in the holotype are sloping rather strongly ventrad.

Female and preimaginal stages unknown.

Discussion. As described above, the two specimens studied differ in the setosity of the hypoproct and the mesial union of cerci.

M. evexa resembles M. parilis , M. orthacantha , M. pacifica and M. sicula . It is distinguished from all these by the row of long setae along the ventral mesial margin of the gonostylus and from all except M. sicula by the unusually small parastylar lobe. From M. sicula , M. evexa also differs e.g. by a simple, not many-lobed gonostylus, and a simple, not two-branched apical lobe on the dorsal mesial margin of the gonocoxa.

Types. Holotype. Male, Papua New Guinea, Morobe Province, Lakekamu basin, Tekadu, 470 m, bush close to Yenina River, Malaise trap, 17–20.XI.1999, H. Hippa, R. Norberg and D. Borisch (in NRM).

Paratypes. 1 male, Papua New Guinea, Madang province, Baitabag village, Kau Wildlife Area, 50 m a. s. l., S 5o 08’, E 145o 46’, primary forest, Malaise trap, 2.2– 9.2.2000, Lukáš Č iżek leg. (in NRM).

Figures

FIGURE 1. Pleura, lateral view. A. Manota serawei sp. n. (holotype). B. M. explicans sp. n. (paratype). C. M. perissochaeta sp. n. (paratype). D. M. spathula sp. n. (holotype). E. M. bicuspis sp. n. (paratype). Scale 0.10 mm.

FIGURE 18. Manota parilis sp. n. A. Hypopygium, ventral view (paratype). B. Hypopygium, dorsal view (holotype). C. Antennal flagellomere 4, lateral view (paratype). Scale for A and B 0.10 mm, for C 0.05 mm.

FIGURE 19. Manota evexa 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.