Leefmansiella Kolesik & Gagné., 2020

Kolesik, Peter & Gagné, Raymond J., 2020, A review of the gall midges (Diptera: Cecidomyiidae) of Indonesia: taxonomy, biology and adult key to genera, Zootaxa 4847 (1), pp. 1-82 : 39

Leefmansiella Kolesik & Gagné. New Genus

[ Figs 20 a–s]

Type species: Trishormomyia pandani Felt , by present designation.

Description. Body robust [ Fig. 20p ]. Head without occipital protuberance, frons with setae. Flagellomeres 12, first and second not fused, binodal in both sexes, bearing one whorl of looped circumfila on basal and two whorls on distal node, loops longer in male than in female on which the two circumfila on distal node connected by single vertical band [ Figs 20m, o, q, s ]. Palpus 3-segmented [ Fig. 20l ]. Wing: R 5 joining C posteriad of wing apex; C weakened but not interrupted at juncture with R 5; R 1 slightly shorter than half wing length; Rs as stub on R 5, closer to arculus than end of R 1; M 4 and Cu 1 forming fork [ Fig. 20k ]. Tarsal claws simple, bent apically, empodia slightly shorter than claws [ Fig. 20j ]. Tergites with posterior and lateral setae, without scales. Male terminalia [ Fig. 20n ]: gonocoxite cylindrical, without mesobasal lobes, densely covered with setae; gonocoxal apodomes merged basally; gonostylus with many long setae and setulose basally, with short setae and carinate distally; cerci triangular, very short; lobes of hypoproct broad, incised apically, with rounded lobes, no longer than cerci,; aedeagus broad, columnar, nearly as long as gonocoxite, blunt apically with many peg-like setae. Ovipositor short; cerci broad, rounded apically, covered with dense, simple setae and microtrichia; hypoproct wide, short, setulose, covered with sparse setae [ Fig. 20r ]. Terminal segment of larva with pair of large lateral lobes [ Figs 20 g–i].

Etymology. This genus is named after the discoverer of the type species, Dutch entomologist Salomon Leefmans (1884–1954).

Remarks. The new genus belongs to the supertribe Cecidomyiidi . The adults fit the tribe Cecidomyiini , but the larval terminus is highly modified into a bilobed structure and different from most Cecidomyiini which have one pair of corniform papillae and three pairs with short setae. The type species was tentatively accommodated by Felt (1921c) in Trishormomyia Kieffer , now a synonym of Planetella Westwood. That genus contains over 50 Holarctic species, with no apparent morphological connection with Leefmansiella (see Gagné 2018 ). All known hosts of Planetella belong to Cyperaceae ( Gagné & Jaschhof 2017) .

Figures

FIGURES 20a–s. Leefmansiella pandani: a–c: galls on Pandanus nitidus in Java: a (Plate IX of Leemans 1921); b (Fig. 27 of DvLR & DvL (1926)); c, whole plant; d–f, pupa: d–e (ventral); f (lateral); g–i: larva: g–h, (ventral); i, terminal segments; j, tarsal claw and empodium (female); k–o: male: k, wing; l, palpus; m, antenna; n, terminalia, gonostyli (detached, dorsal); o, 9th flagellomere; p–s, female: p, whole insect (dorsal); q, 9th flagellomere; r, cerci and hypoproct (dorsolateral); s, antenna (second flagellomere misshapen). Figs a, e–g, i, p from Leefmans (1921), Figs c, d, h by Purnama Hidayat and Melinda Agustina, 2018.