Manota tetrachaeta, Hippa, Heikki, 2009

Hippa, Heikki, 2009, New species and new records of Manota Williston (Diptera, Mycetophilidae) from Thailand, Zootaxa 2017, pp. 1-33 : 20-22

Manota tetrachaeta sp. n.

Figs 11 A, B, C

Male. Colour. Head brown, face pale brown. Antenna brown, scapus and pedicellus slightly paler brown. Mouthparts pale yellowish. Thorax rather unicolorous brown. Legs (tibia and tarsus 1 and femur, tibia and tarsus 2 lost) pale yellowish, apical part of coxa 2 posteriorly and basal fourth of femur 3 infuscated, the latter especially dorsally and ventrally. Wing unicolorous greyish-brown; haltere yellowish-brown with dark brown knob. Abdomen brown, the basal sternites apparently paler than the others. All the setosity pale, yellowish or brownish, the thicker setae seeming darker than the finer setae and trichia. Head. Antennal flagellomere 4, Fig. 11 A. Palpomere 3 of maxillary palpus with apicomesial extension, with 4 apically expanded curved sensilla; palpomere 4 with parasegment. Number of strong postocular setae 11. Thorax. Anepisternum setose, with 67 setae, anterior basalare non-setose, preepisternum 2 setose, with 14 setae, laterotergite non-setose, episternum 3 setose, with ca. 9 setae. Wing. Length 2.2 mm. Hypopygium, Figs 11 B, C: Sternite 9 about half of the ventral length of gonocoxa, lateral margin sharply delimited, posterior margin transverse, membraneous, anterior margin deeply incised, the setae similar to the adjacent ventral setae of gonocoxa. Ventral mesial margin of gonocoxa simple, membraneous, with a very strong seta at the middle. Parastylar lobe sickle-shaped, oblique, with two setae anteriorly. Paraapodemal lobe distinct, well exposed in ventral view. Dorsal mesial margin of gonocoxa simple, with a rounded setose lobe subapically and apically. Two juxtagonostylar setae present: both are strong sigmoid megasetae, one with blunted, the other with attenuated apex, both arising from a common basal body which is about half the length of the megasetae. Gonostylus simple, elongate-oval, apically slightly curved, ventrally and laterally covered by moderately long setosity, dorsally and mesially with shorter setosity only at apex and on basal half, with a row of 4 very long setae at dorso-mesial margin. Aedeagus subtriangular, with lateral shoulders, the apical part curved ventrad. Hypoproct posteriorly reaching between the base and the middle of gonostylus, with ca. 15 setae on each half. Cerci mesially separate.

Female unknown.

Discussion. M. tetrachaeta represents a rather common Oriental type of Manota : the preepisternum 2 is setose, the laterotergite is non-setose, the parastylar lobe is sickle-shaped and there are two subequal juxtagonostylar megasetae arising from a long common basal body. M. tetrachaeta is not especially similar to any single species in this group. It is distinguished from all the similar species by the strong and long seta at the ventral mesial margin of gonocoxa and by the four very long transverse setae at the dorsal mesial margin of the gonostylus. At first sight, M. tetrachaeta is reminiscent of M. crinita because of the transversely directed long gonostylar setae, but in the latter the setae are at the ventral mesial margin. Etymology. The name is derived from the Greek words tetra, four, and chaite, hair, and refers to the four long setae on the gonostylus.

Types. Holotype. Male, THAILAND, Chiang Mai, Doi Inthanon NP, Checkpoint 2 18o 31.554’N 98o29.94’E, 1700 m, Malaise trap 24.xi.–1.xii.2006, Y. Areeluk leg., T1870 (in QSBG).

Figures

FIGURE 11. Manota tetrachaeta sp. n. (holotype). A. Antennal flagellomere 4, lateral view. B. Hypopygium, dorsal view. C. Hypopygium, ventral view. Scale 0.10 mm.