Manota polylobata, Hippa & Søli & Kurina, 2019

Hippa, Heikki, Søli, Geir & Kurina, Olavi, 2019, New data on the genus Manota Williston (Diptera: Mycetophilidae) from Africa, with an updated key to the species, Zootaxa 4652 (3), pp. 401-441 : 425-427

Manota polylobata sp. n.

Figs 11 A–D

Male. Colour. Head light brown, face somewhat paler. Antenna: scape and pedicel light brown, flagella absent in holotype. Clypeus and mouthparts pale yellowish. Thorax light brown to brown. Legs yellowish, apical fourth of hind femur slightly infuscated. Wing with light brownish tinge because of microtrichia; halter yellowish with blackish knob. Abdomen brown, tergites laterally and sternites lighter. All vestiture pale, yellowish or brownish, thicker setae and trichia seeming darker than finer ones. Head. Palpomere 3 of maxillary palpus with apicomesial thumb-like extension, with 4 apically curved sensilla; palpomere 4 with parasegment; palpomere 5 not measurable in holotype. Nine strong postocular setae. Thorax. Anepisternum with 40 setae; anterior basalare with 10 setae, laterotergite with 34 setae, preepisternum 2 non-setose; metepisternum with 21 setae. Legs. Mid and hind tibial organs absent. Wing. R 1 meeting C within basal half of costal margin; sclerotized part of M 2 extending to level of tip of R 1; wing length 2.2 mm. Hypopygium ( Figs 11 A–D). Sternite 9 laterally fused to gonocoxa, posterior margin broad, convex, extending over middle between bases of gonocoxa and gonostylus, anterior margin with a deep and narrow V-shaped incision medially, anterior 1/3 non-setose, posterior 2/3 setose, setae similar to those on ventral side of gonocoxa. Ventral medial margin of gonocoxa oblique, laterally from gonostylus drawn into a suboval lobe about half of gonostylus length, bearing conspicuous microtrichia on ventral surface and two subapical twisted and apically whip-like megasetae. Parastylar lobe bifurcate, anterior branch short, smaller than posterior that has an apical seta. No paraapodemal lobes identifiable. Dorsal medial margin of gonocoxa simple with submembranous lobe on more ventral level, just anteriorly from juxtagonostylar setae, bearing row of three megasetae gradually diminishing in size posteriad: anterior megaseta flat and apically dilated, medial megaseta similar but apically somewhat narrower, posterior megaseta pointed. Gonocoxal apodeme unusual, posteriorly strongly widened. Setae on dorsal side of gonocoxa similar to those on ventral side. Two juxtagonostylar seta present, both short, flattened and expanded megasetae, arising from a common basal body which is shorter than megasetae. Gonostylus complex, with prominent medial lobe and two small lobes laterally; the medial prominent lobe longitudinally drawn out, about half as long as gonocoxa, apically conical with ca. 8 long marginal setae, medial margin with an aggregation of ca. 10 setae on ventral surface, dorsally with an additional medial lobe bearing a row of 6–7 setae; the lateral lobe subquadrangular with 6–8 small setae apically; the medial lobe finger-like with 4 apical setae. Aedeagus subtriangular, without lateral shoulders, apex curved ventrad. Hypoproct extending posteriorly near to apex of gonostylus, apical third tapering, number of ventral setae (sternite 10) ca. 40 on each half. Cerci medially separated, setae scattered over the surface, apical 4–5 setae about twice as long as rest of cercal setae.

Female. Unknown.

Etymology. The name is combined from Greek πολύ (polú) ‘many’ and Latin lobata ‘lobed, with lobes’, referring to the four-lobed gonostylus.

Comments. Manota polylobata sp. n. belongs to a group of 14 Afrotropical species that have (1) setose laterotergite and anterior basalare, (2) the ventral setae of the hypoproct scattered over the whole ventral surface, (3) nonsetose preepisternum 2, and (4) the dorsal medial margin of gonocoxa posteriorly without a row of scale- or leaf-like megasetae (see couplets 21 to 33 in the Key of the Afrotropical species above). Among them, M. polylobata is most similar to M. tridactyla in having a complex gonostylus, two leaf-like juxtagonostylar megasetae, and megasetae at dorsal medial margin of the gonocoxa close to posterior end of the margin (should not to be confused with a distinct row of leaf- or scale like megasetae posteriorly on dorsal medial margin of gonocoxa as defined under M. geniculata ). Manota polylobata differs in having 3 megasetae at dorsal medial margin of gonocoxa with the anteriormost megaseta apically dilated (4 megasetae with the anteriormost hook-like in M. tridactyla ).

Types. Holotype. Male , NIGERIA, SE State, Obudu CR, 27.ix.1973, J.T. Medler coll. (slide mounted, MNHN).

Figures

FIGURE 11. Manota polylobata sp. n. (holotype). A. Hypopygium, dorsal view. B. Hypopygium, ventral view. C. Gonostylus, dorsal view. D. Hypoproct and aedeagus, ventral view. Scale 0.1 mm.