Zygomyia paniculata, Kurina & Õunap, 2023

Kurina, Olavi & Õunap, Erki, 2023, Morphological and molecular data reveal fifteen new sympatric Zygomyia Winnertz, 1864 (Diptera: Mycetophilidae) species from Ecuador, Zootaxa 5227 (1), pp. 1-49 : 20-22

Zygomyia paniculata sp. nov.

( Figs 1E , 10A–D , 21C )

urn:lsid:zoobank.org:act:0512631B-F64E-48B5-959A-BCB0C5CC24F8

Type material. HOLOTYPE ♂, ECUADOR, Napo Province, Yanayacu Biological Station , 0.6164S 77.8831W, alt. 2122 m, 1–3.ix.2019, X. Mengual leg., Malaise trap (mounted from alcohol with terminalia in glycerine, INABIO; specimen code: MECN-EN-DIP-4865; one fore leg used for DNA extraction, GenBank accession number: OP747429 ) . PARATYPES: 2 ♂♂, same as holotype (1 ♂, mounted from alcohol, ZFMK; 1 ♂, mounted from alcohol, IZBE) .

Diagnosis. In having the posteroventral margin of the gonocoxites with a setose medial protrusion, Z. paniculata resembles Z. spinosa . It differs by the medial protrusion being prominent, tightly covered with setae (medial protrusion shallow, covered with short setae in Z. spinosa ), the ventral branch of the gonostylus simple, crescent-shaped (ventral branch of the gonostylus drawn posteromedially into a digitate lobe bearing a comb of spines medially in Z. spinosa ), and the dorsal branch of the gonostylus ovoid, with a large sabre-shaped megaseta at lateral margin posteriorly (dorsal branch of the gonostylus sub-quadrate, with an aggregation of small spines anteroventrally in Z. spinosa ).

Description. Male (n = 3). Body length 3.1–3.3 mm. Wing length 2.9–3.1 mm; ratio of length to width 2.50–2.68.

Head. Dark yellow with numerous dark setae. Two ocelli, surrounded by dark-brown areas, close to eye margins. Clypeus yellow, somewhat lighter than head. Mouth-parts yellow to light brown. Palpus with all segments brown, ratios of three apical segments 1:1.5:2.5. Scape, pedicel and flagellomeres light brown. Flagellomeres cylindrical, first flagellomere 2.0 × as long as broad, fourth flagellomere 1.29 × as long as broad, apical flagellomere 2.4 × as long as broad basally. Flagellomeres with short brownish setae.

Thorax. Mesonotum dark yellow. Pleural parts yellow with katepisternum somewhat lighter, and upper and fore margin of anepisternum and hind margin of laterotergite brown. All bristles and setae on thorax brown. Scutellum with setae, including four strong marginal bristles. Antepronotum with setae, including 6–7 bristles of different lengths. Proepisternum with setae including 3–4 stronger bristles. Anepisternum with a number of posteriorlydirected short setae and 6–7 bristles of different lengths on dorsal part. Anepimeron with short setae and 3–4 bristles on dorsal part. Laterotergite with 4–6 dorsally-directed setae medially. Metepimeron with 5–6 setae on posterior part. Halter yellow. Legs yellow, except hind tibia apically brown. Tarsi appear darker, due to dense brown setation. Whole anterior side of fore coxa, apical fourth of anterior side of mid coxa and all femora clothed in dark setae. Hind coxa with 3–4 short setae on posterior side apically. Mid femur with 2–3 apicoventral bristles of different size, hind femur with 3–4 apicoventral bristles of different size. Mid tibia with 3 a, 5 d (progressively longer towards apex) and 1 v. Hind tibia with 4 a, 4 d (progressively longer towards apex). Hind tibia with apical comb of setae posteriorly. Length ratio of femur to tibia for fore, mid and hind legs: 1.11–1.16, 0.98–1.00, 0.83–0.90. Length ratio of tibia to basitarsus for fore, mid and hind legs: 1.06, 1.24–1.32, 1.53–1.59. Wing membrane hyaline with light brownish tinge, without markings. Veins light brown. R 1 and R 4+5 with strong setae on both sides. Crossvein rm with two setae, bM-Cu glabrous. M 1, M 2 and CuA devoid of setae. m-stem 1.2 × as long as r-m. Costa not extending beyond R 4+5.

Abdomen. Brown with hind margins of tergites I–V vaguely yellow laterally. Terminalia ( Figs 10A–D , 21C ) yellow. Posteroventral margin of gonocoxites concave, with medial tightly setose, sub-rounded lobe extending to half-length of dorsal branch of gonostylus. Posterior half of gonocoxite sparsely setose with setae of similar size. Ventral branch of the gonostylus simple, crescent-shaped, setose, with aggregations of stronger setae at anteromedial and posteromedial corners, and at medial margin. Dorsal branch of the gonostylus ovoid, two times as long as ventral branch, setose, with group of stronger setae at posterior margin and large sabre-shaped megaseta at lateral margin posteriorly. Aedeagus apically hastate, membranous. Parameres broad, crescent-shaped, sub-apically constricted, with apical part narrow and obtuse, not extending over aedeagus posteriorly. Gonocoxal apodemes narrow along whole length.

Female. Unknown.

Etymology. The specific epithet is Latin, paniculata [equipped with tuft], referring to the tight aggregation of setae medioventrally on apical margin of the gonocoxite.

Figures

FIGURE 1. Habitus of Zygomyia species from Ecuador (all photos are taken from holotypes). A, Z. diversiseta sp. nov.; B, Z. longistyla sp. nov.; C, Z. flamma sp. nov.; D, Z. acrotricha sp. nov.; E, Z. paniculata sp. nov.; F, Z. geniculata sp. nov.; G, Z. pectinella sp. nov.; H, Z. comata sp. nov. Scale bars = 1 mm.

FIGURE 10. Zygomyia paniculata sp. nov., male terminalia (holotype, MECN-EN-DIP-4865). A, B, ventral view; C, dorsal view; D, posterior view. Scale bar 0.1 mm (A, C) and 0.05 mm (B, D).

FIGURE 21. Aedeagal apparatus of Zygomyia species from Ecuador (all photos are taken from holotypes). A, Z. diversiseta sp. nov.; B, Z. spinosa sp. nov.; C, Z. paniculata sp. nov.; D, Z. uniordata sp. nov. Scale bar = 0.1 mm.