Manota chi, Hippa, Heikki, 2009

Hippa, Heikki, 2009, New species and new records of Manota Williston (Diptera, Mycetophilidae) from Thailand, Zootaxa 2017, pp. 1-33 : 8-10

Manota chi sp. n.

Figs 4 A, B, C

Male. Colour. Head pale brown, frons, vertex and dorsal part of occiput darker brown. Antennal scapus, pedicellus and flagellomeres 2–4 pale brown, the rest of flagellum darker greyish-brown with the apical flagellomere paler than the others. Mouthparts pale yellowish. Thorax pale brown, posterior half dorsally brown, ventral part of preepisternum 2 paler than the other parts of pleura. Legs pale yellowish, the apices of coxae 2 and 3 and their trochanters indistinctly infuscated, femur 3 infuscated at base and on apical third. Wing unicolorous greyish; haltere 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. 4 A. Palpomere 3 of maxillary palpus with apicomesial extension, with 4 apically expanded curved sensilla; palpomere 4 with parasegment. Number of strong postocular setae 9–10. Thorax. Anepisternum setose, with 22–25 setae, anterior basalare setose, with 3–5 setae, preepisternum 2 setose, with 16–25 setae, laterotergite non-setose, episternum 3 setose, with 3–8 setae. Wing. Length 1.6 mm. Hypopygium, Figs 4 B, C: Sternite 9 about half the ventral length of gonocoxa, lateral margin sharply delimited, posterior margin with or without a shallow medial notch, anterior margin deeply incised, the setae similar to the adjacent ventral setae of gonocoxa. Ventral mesial margin of gonocoxa simple, convex. Parastylar lobe large, with numerous setae at margin. Paraapodemal lobe distinct, well exposed in ventral view or concealed by the gonocoxa. Dorsal mesial margin of gonocoxa simple, subapically with a broad lobe with a few marginal setae; the latter covering a plate-like lobe with ventrally directed setae of which setae 5–10 are stronger and form a curved row. At apico-dorsal margin of gonocoxa with a prominent seta with a small but distinct basal body. Two juxtagonostylar setae present, both rather unmodified curved megasetae which are widely separated and arise from a low common basal body. Gonostylus simple, elongate-oval, both ventral and dorsal sides with moderately long unmodified setae, at the mesial margin with a row of 5 strong setae differing from the other setosity. Aedeagus elongate-subtriangular, with weak lateral shoulders, the apical structures unusual: apical tube elongated and directed posteriad, laterally flanked by two narrow lamellae giving the image of a three-forked apex; towards base from this three-forked apex with two lamellae arising laterally from the aedeagus and crossing each other on its ventral side. Hypoproct posteriorly extending to middle of gonostylus, with a large crescent-shaped medial plate, ventrally with ca. 10 setae in a transversely oblique row on each half. Cerci mesially separate.

Discussion. M chi is similar to M. planilobata and M. subseducta . It is distinguished from both as well as from all other described Manota by its unusual aedeagus which has a three-forked apex and subapical ventrally crossed lobes. M. chi is also distinguished from these two species by many other characters, e.g. in M. chi the setae on the plate-like lobe subapically at the dorsal mesial margin of gonocoxa are more numerous, the posterior margin of sternite 9 is less deeply notched, the gonostylus has a more oval outline and its strong mesial setae are in an evenly spaced row at the middle of gonostylus, not with one of the setae near the middle of the mesial margin, and the others are placed subapically. M. chi , M. planilobata and M. subseducta resemble M. seducta and M. clavulosa but differ e.g. by having a crescent-shaped plate on the hypoproct and by having the setae on the hypoproct in one transverse row. See also under M. seducta .

Etymology. The name is derived from the Greek letter chi and refers to the two chi -like crossing lamellae on the aedeagus.

Types. Holotype. Male, THAILAND, Nakhon Ratchasima, Khao Yai NP, evergreen forest near tiger trail, 14o27.511’N 101o22.408’E, 760 m, Malaise trap 19–26.vi.2007, Pong Sandao leg., T2229 (in QSBG).

Paratypes. 2 males with same data as the holotype (in QSBG and SMNH); 1 male with same data except 12–19.vi.2007, Wirat Sukho leg., T2226 (in QSBG).

Figures

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