Manota curvistylus, Hippa, Heikki, Kjaerandsen, Jostein & Saigusa, Toyohei, 2011

Hippa, Heikki, Kjaerandsen, Jostein & Saigusa, Toyohei, 2011, The genus Manota Williston (Diptera, Mycetophilidae) in Japan, with a key to the Palaearctic species of the genus, Zootaxa 2892, pp. 33-46 : 35-36

Manota curvistylus sp. n.

Figs 2 A–D

Male. Colour. Head pale brown, frons, vertex and dorsal part of occiput darker brown. Mouthparts pale yellowish. Antenna brown, scapus, pedicellus and ventral part of flagellomeres 1–4 paler yellowish. Thorax brown, prothorax and mesothoracic preepisternum 2 (katepisternum) pale yellowish, lateral margin of scutum obscurely paler brown, mesothoracic anepisternum paler than laterotergite. Legs pale yellowish, ca. apical fifth of femur 3 infuscated, apex of coxa 2 and 3 and respective trochanters very slightly infuscated. Wing unicolorous greyish-brown; haltere yellowish with dark brown knob. Abdomen brown, sternites apparently paler but the character is not well seen in the mounts. All the setosity pale, the thicker setae seeming darker, even black, than the finer setae and trichia. Head. Antennal flagellomere 4, Fig. 2 A. Palpomere 3 of maxillary palpus with apicomesial thumb-like extension, with 2–4 apically expanded curved sensilla; palpomere 4 with parasegment, palpomere 5 ca. 1.2 times longer than palpomere 4. Number of strong postocular setae 11. Thorax. Anepisternum setose, with ca. 60 setae, anterior basalare setose, with ca. 15 setae, preepisternum 2 non-setose, laterotergite setose, with ca. 30 setae, episternum 3 setose, with ca. 6 setae. Legs. Middle tibial organ lacking. Hind tibial organ lacking. Wing. R1 meeting C well on the basal half of the costal margin; the sclerotized part of M2 basally extending to the level of the tip of R1, wing length 1.8–2.0 mm. Hypopygium, Figs 2 B, C, D: Sternite 9 laterally fused with gonocoxa, extending posteriorly as far as the ventral posterior margin of gonocoxa, anterior margin with a shallow incision, the setae similar to ventral setae of gonocoxa. Parastylar lobe subtriangular, with three setae at apex. Paraapodemal lobe not identifiable. Tergite 9 membraneous, the basal margin somewhat sclerotized and discernible. Dorsal mesial margin of gonocoxa shallowly concave, subapically with a flattened megaseta which is expanding from base to apex. At the dorsal mesial margin of gonocoxa, on more ventral level, a plate-like lobe with ca. 10 blunt megasetae at its mesial and posterior margin. One juxtagonostylar seta present: a flattened complicate megaseta arising from a basal body which is almost as long as the megaseta. Gonostylus rather small, apically indistinctly bilobed, the more ventral and mesial one almost indistinguishable, the more dorsal and lateral one long, finger-like, in right angle to the main axis of the gonostylus; the ventral side with a few setae, the dorsal side almost nonsetose except for a few apicolateral setae and a few setae at the apex of the apical lobe; the mesial margin apically with three prominent strong setae. Aedeagus with a broad basal part and narrow almost parallel-sided apical part separated by strong lateral shoulders; the apex curved ventrad. Hypoproct large, posteriorly extending farther than the apex of gonostylus, with ca. 80 scattered setae on each half. Cerci mesially separate.

Female unknown.

Discussion. Manota curvistylus belongs to a specious group, distributed in Afrotropical, Australian, Neotropical and Oriental regions, characterized by a large sternite 9 which posteriorly extends to the level of the gonostylar base and laterally is fused with the gonocoxa. Manota curvistylus is similar to M. flammula Hippa, 2011 and M. obtecta Hippa, 2009 , both known from Thailand, and M. kyushuensis sp. n. by having one megaseta subapically at the dorsal mesial margin of gonocoxa instead of having two or more or lacking megasetae at that position. This new species is also similar to M. obtecta by having the megaseta flattened and expanding from narrow base to a broad apical part, instead of being only slightly flattened, narrow and parallel-sided like in M. flammula and M. kyushuensis . Manota curvistylus is distinguished from M. obtecta by the following characters: 1) the parastylar lobe is subtriangular, simple and with three apical setae instead of being sickle-shaped, with a transverse crest on the ventral side and with numerous apical setae, 2) the apicolateral lobe on the gonostylus is long, several times longer than broad and longer that the subbasal width of gonostylus instead of being only as long as broad and about one third of the subbasal width of the gonostylus, and 3) the juxtagonostylar megaseta is flattened and greatly expanded instead of being a simple rather thin megaseta.

Etymology. The name, curvistylus , is a Latin noun in apposition referring to the curved shape of the gonostylus.

Types. Holotype. Male, JAPAN, RYUKYUS, Kagoshima Prefecture, Amami Islands, Amami-Ôshima, April 18, 1974, Malaise trap, leg. H. Makihara (in KMNH).

Paratypes. JAPAN, RYUKYUS, 1 male, Okinawa Prefecture, Yaeyama Islands, Iriomote-jima, Mt. Ushikumori, 24°19'48"N, 123°48'00"E, 350 m a.s.l., 3–7 Nov 1963, leg. G. A. Samuerson (in MZLU); 1 male, Okinawa Prefecture, Okinawa-jima, Kunigami-son, Hijigawa, 26°43'09"N, 128°10'36"E, 50–150 m a.s.l., 4 Mar 1997, leg. T. Saigusa (in KMNH).

Figures

FIGURE 2. Manota curvistylus sp. n. (A paratype, B, C, D holotype). A. Antennal flagellomere 4, lateral view. B. Hypopygium, ventral view. C. Hypopygium, dorsal view. D. Gonostylus, dorsal view. Scale 0.1 mm.