Manota perlobata, Hippa, Heikki, 2008

Hippa, Heikki, 2008, New species and new records of Manota Williston (Diptera, Mycetophilidae) from the Oriental region, Zootaxa 1723, pp. 1-41 : 31-33

Manota perlobata sp. n.

( Figs 1 C, D, 18 A, B, C)

Male. Colour. Head brown, mouthparts pale yellowish. Thorax brown, pleura paler than other parts, ventral part of preepisternum 2 palest. Legs pale yellowish, femora 2 and 3 infuscated, more intensively at base and on apical fourth especially of femur 3, tibia 3 infuscated at base. Wing unicolorous pale yellowish-brown; haltere pale 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. 18 A. Palpomere 3 of maxillary palpus with apicomesial extension, with 4 apically expanded curved sensilla; palpomere 4 with parasegment. Number of postocular setae 11. Thorax. Anepisternum setose, with 50 setae, anterior basalare setose, with 6–9 setae, preepisternum 2 setose, with 16–17 setae, laterotergite non-setose, episternum 3 setose, with 7–10 setae. Wing. Length 2.1–2.3 mm. Hypopygium, Figs 18 B and C: Sternite 9 about one-half of the ventral length of gonocoxa, lateral margin sharply delimited, converging towards the narrow cleft posterior margin, anterior margin deeply incised, the setae similar to the ventral setae of gonocoxa. The ventral aspect of gonocoxa unusual, largely covered by a plate which widens posteriad. Parastylar lobe in the usual meaning not identifiable (see the discussion below). Paraapodemal lobe not identifiable. Dorsal mesial margin of gonocoxa with two large, flat, apically setose lobes on its apical half: a more anterior one which is oval in outline, and a more posterior and ventral one which is basally narrow but widens towards apex. At the position of the juxtagonostylar setae with three megasetae: two of these arising from a common basal body which is as long as the megasetae, the third one arising from a separate similar basal body. Gonostylus complicated, with a narrow basal part giving rise to three mesially-directed lobes of which one is ventral and rather short, one is dorsal and as long as the basal part of gonostylus, and the third one lies between the two others and is longer than the basal part of gonostylus; basal part of gonostylus with rather short setae ventrally, laterally and dorsally but not mesially, ventral lobe with some very long marginal setae, the middle and dorsal lobes with rather short setae apically and along mesial margin, middle lobe also on dorsal surface; dorsal side of dorsal lobe with a large submembranous area with obliquely-placed striae. It seems that the middle and dorsal lobes may be movable. Tegmen unusually small, with lateral shoulders, the apodemes directed obliquely posteriad, the apical tube directed posteriad. Hypoproct posteriorly extending to the base of gonostylus, with some 20 setae on each half. Cerci medially separate posteriorly, incompletely fused anteriorly.

Female. Similar to male. Antennal flagellomere 4, Fig. 1 C. Palpomere 3 with 4 apically expanded sensilla. Anepisternum with 24–37 setae, anterior basalare with 5 setae, preepisternum 2 with 14–20 setae, episternum 3 with 3 setae (this could be observed in only one of the specimens). Wing length 1.8–2.3 mm. Apical part of abdomen, Fig. 1 D: Cercus 1-segmented (in the drawing, the area marked with a broken line indicates a structure which is on the mesial surface), with 4 groups of hyaline sensilla, the number of these sensilla lower in all groups in the other female (which was not illustrated).

Discussion. In its hypopygium, M. perlobata is very dissimilar to any other described Manota , in that the homologies of many structures are difficult to see. The ventral surface of the gonocoxa is occupied by a large plate extending from sternite 9 to the base of gonostylus and laterally demarcated by a distinct margin. This plate could represent the parastylar lobe. The lobes on the dorsal side of gonocoxa are somewhat reminiscent of the Oriental M. forceps Hippa and Papp and of the Oceanian M. maorica Edwards and M. serawei Hippa , but it has a more complicated structure of the lobes than any of these. The geniculate gonostylus with three apical lobes is very unlike other Manota and easily identifies the species. The female differs from other Manota in which the female is known by the one-segmented, not two-segmented, cercus and by having groups of finger-like hyaline sensilla on the cercus. The two females studied are not identical (see above) and could belong to different species. Apart from its many unusual characters in the male hypopygium and female terminalia, M. perlobata does not differ in any special way from other Manota .

Types. Holotype. Male, THAILAND, Chiang Mai, Doi Inthanon NP, checkpoint 2, 1700 m, 18o 31.559N 98o29.941’E, Malaise trap 21–27. ix.2006, Y. Areeluk leg., T343 (in QSBG).

Paratypes. 1 male with same data as holotype but 2– 9.viii., T127 (in SMNH). 1 male (pinned, hypopygium on slide), BURMA, Kambaiti, 7000 ft., 25.V.1934, R. Malaise (in BMNH).

Other material. 2 females with same data as holotype but 2– 9. viii and 16–24.viii, T127 and T187 (in QSBG).

Figures

FIGURE 1. Female antennal flagellomere 4, lateral view (A, C, E), and apical part of female abdomen, lateral view (B, D, F). A, B. Manota clavulosa sp. n. C, D. M. perlobata sp. n. E, F. M. inflata sp. n. Scale for A, C and E 0.05 mm, for B, D and F 0.10 mm.

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