Manota exigua, Hippa, Heikki, Kurina, Olavi & Sääksjärvi, Ilari E., 2017

Hippa, Heikki, Kurina, Olavi & Sääksjärvi, Ilari E., 2017, The genus Manota Williston (Diptera: Mycetophilidae) in Peruvian Amazonia, with description of sixteen new species and notes on local species richness, Zootaxa 4236 (1), pp. 1-40 : 14-15

Manota exigua sp. n.

Figs 8 A–C

Male. Colour. Head dark brown, face somewhat paler. Antenna including scape and pedicel light brown. Clypeus and mouthparts yellowish. Thorax brown, medial part of scutum and scutellum somewhat darker. Legs yellowish, apical fifth to fourth of hind femur infuscated. Wing with slight brownish tinge; haltere yellow with dark brown to blackish knob. Abdomen light brown, medial 2/3 of tergites dark brown. All setosity pale, yellowish or brownish, the thicker setae seeming darker than the finer ones. Head. Fourth antennal flagellomere 2 times as long as broad. Palpal segment 3 of maxillary palpus with apicomedial thumb-like extension, with three apically curved sensilla; palpomere 4 with parasegment; palpomere 5 about 1.1–1.2 times longer than palpomere 4. Nine strong postocular setae. Thorax. Anepisternum with 47–58 setae; anterior basalare, preepisternum 2 and laterotergite non-setose; metepisternum with 13–14 setae. Legs. Mid- and hind tibial organs absent. Wing. R1 meeting C within the basal half of the costal margin; the sclerotized part of M2 not extending to the level of the tip of R1; wing length 1.4–1.5 mm. Hypopygium. Figs 8 A–C: Sternite 9 short, laterally fused with gonocoxa, the posterior margin concave, not extending more than one quarter of the distance between the base of gonocoxa and gonostylus, anterior margin with a deep U-shaped incision medially, the setae similar to the adjacent ventral setae of gonocoxa. Ventral medial margin of gonocoxa shallowly concave, anteriorly forming a curved narrow lobe, posteriorly from the gonostylus forming a long narrow lobe together with the lateral margin, the ventral setae of gonocoxa unmodified except for a few stronger setae anteriorly at the ventral medial margin and posteriorly on the lateral lobe. Parastylar and paraapodemal lobes not identifiable. Dorsal medial margin of gonocoxa lobe-like bulging medially. Posterodorsal margin of gonocoxa with a row of 3 or 4 strong setae of which the posteriormost 2 are flat and dilated. Otherwise the dorsal setosity similar to the ventral one, except for a few long setae posterolaterally. At the dorsal medial margin, dorsally from the juxtagonostylar setae, an obscure, curved submembranous lobe the exact character of which is not clear. Ventrally from the dorsal medial margin two lobes, one plate-like with a long blunted megaseta, the other, more posterior, narrower with a group of ca. 5 setae on its curved posterior part. Two juxtagonostylar setae present, the ventral one a rather unmodified strong seta, the dorsal one flattened and dilated with two fine apices, both megasetae arising from a common basal body that is as long as the megasetae. Gonostylus broadly oval, medial margin more strongly curved than the lateral margin, with ca. 8 setae at the medial margin and with a strong megaseta-like seta at apex, otherwise non-setose both on the ventral and the dorsal side. Aedeagus narrowly subtriangular, the apex curved ventrad. Hypoproct extending posteriorly to the apex of gonostyli, the number of ventral setae (sternite 10) ca. 15 on each half. Cerci medially separate.

Female. Unknown.

Discussion. Manota exigua is quite similar to M. pisinna and M. aristoseta and can easily be mistaken for them. It differs from both in having 1) the ventromedial margin of the gonocoxa anteriorly drawn into a curved lobe, and 2) sternite 9 ca. three times broader than long. Manota exigua is more similar to M. pisinna in having the two megasetae on the dorsal medial margin without a seta-like branch (with branch in M. aristoseta ) and in having several setae on the medial margin of the relatively shorter gonostylus (without setae in M. aristoseta ). See also discussion under M. aristoseta .

Etymology. The name is Latin, exigua , ‘small’, referring to the small size of the fly.

Types. Holotype. Male, PERU, Department of Loreto, Iquitos area , Mishana , 1–16. x.1998, Malaise trap C1, I.

E. Sääksjärvi et al. leg. (on slide, UNSM). Paratypes. 1 male, same data as holotype except 16.xii.1998 – 1.i.1999, Malaise trap A2 (on slide, IZBE); 1 male, Department of Loreto, Iquitos area, Allpahuayo , [15] – 29.iv.2000, Malaise trap I1 (8), I. E. Sääksjärvi et al. leg. (on slide, ZMUT).

Figures

FIGURE 8. Manota exigua sp. n. (holotype). A. Hypopygium, ventral view. B. Hypopygium, dorsal view. C. Hypoproct and aedeagus, ventral view. Scale 0.1 mm.