Zygomyia comata, 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 : 9-11

Zygomyia comata sp. nov.

( Figs 1H , 4A–E , 20A )

urn:lsid:zoobank.org:act:11AEAC0A-9E70-490F-806E-742BF8BDC936

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-4859; one fore leg used for DNA extraction, GenBank accession number: OP747422 ). PARATYPES: 6 ♂♂, same as holotype (mounted from alcohol, 1 ♂ INABIO, 2 ♂♂ IZBE, 3 ♂♂ ZFMK); 5 ♂♂, ECUADOR, Napo Province, Yanayacu Biological Station , 0.5956S 77.8942W, alt. 2234 m, 29.viii– 3.ix.2019, X. Mengual, T. Salden leg., double Malaise trap (mounted from alcohol, 3 ♂♂ IZBE, 2 ♂♂ ZFMK).

Diagnosis. Distinguished easily from other species by the very long setae on the gonocoxite posterolaterally, and unique gonostylus with dorsal branch bearing posteriorly a row of five megasetae of different size and a row of 5–6 long straight setae at anterolateral margin.

Description. Male (n = 3). Body length 2.4–2.5 mm. Wing length: 2.3–2.5 mm; ratio of length to width 2.68– 2.76.

Head. Dark yellow with numerous dark setae. Two ocelli close to eye margins. Clypeus yellow, somewhat lighter than head. Mouth-parts yellow. Palpus with all segments light brown, ratios of three apical segments 1:1.6:2.4. Scape and pedicel yellow, flagellomeres light brown. Flagellomeres cylindrical, first flagellomere elongated, 2.8 × as long as broad, fourth flagellomere 1.33 × as long as broad, apical flagellomere conical, 2.5 × as long as broad basally. Flagellomeres with short yellowish setae.

Thorax. Mesonotum yellow. Pleural parts pale yellow, except anepisternum somewhat darker on dorsal part. All bristles and setae on thorax brown. Scutellum with marginal setae, including four strong bristles. Antepronotum with setae, including 2–4 bristles of different lengths. Proepisternum with setae including 2–3 stronger bristles. Anepisternum with a number of posteriorly-directed short setae and 3–4 bristles of different lengths on dorsal part. Anepimeron with short setae and 2–3 bristles on dorsal part. Laterotergite with 2–3 dorsally-directed weak setae on dorsal half. Metepimeron with 1–2 setae on posterior part. Halter yellow. All legs entirely yellow. 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 patch of setae on posterior side apically. Mid femur with 2–3 and hind femur with 3 apicoventral bristles. Mid tibia with 2 a, 4 d, 0 p and 1 v. Hind tibia with 6–8 a and 3 d. Length ratio of femur to tibia for fore, mid and hind legs: 1.00–1.05, 1.04–1.14, 0.77–0.81. Length ratio of tibia to basitarsus for fore, mid and hind legs: 1.16–1.20, 1.40–1.42, 1.55–1.78. Wing membrane with light brownish tinge but without distinct markings. Veins light brown. R 1 and R 4+5 with strong setae on both sides. Crossvein rm and bM-Cu glabrous. M 1 with 4–5, M 2 with 0–4 and CuA without apical setae on dorsal surface. rm somewhat shorter than m-stem. Costa not extending beyond R 4+5.

Abdomen. Brown with yellow anterior markings on tergites laterally. Terminalia ( Figs 4A–E , 20A ) yellow to light brown. Posteroventral margin of gonocoxites medially broadly concave. Gonocoxite setose with aggregation of posterolateral long setae deviating from other setosity. Ventral branch of the gonostylus trifurcate, anterior part medially setose, with (1) ventral and dorsal digitate lobes curved, with apical spines, and (2) medial lobe shorter, conical with marginal setae on dorsal side. Dorsal branch sub-quadrate, somewhat tapering and bent, posteriorly blunt, with (1) line of 5–6 straight long setae anterolaterally, (2) transverse aggregation of short setae on anterior third dorsally, (3) long curved seta at medial margin sub-basally, (4) 3–4 curved long setae on dorsal surface sub-apically, and (5) five megasetae of different size at posterior margin, most medial megaseta apically dilated. Aedeagus apically blunt, with large lateral guides. Parameres about as long as aedeagus, apices pointed and bent medially. Gonocoxal apodemes large, anteriorly arched.

Female. Unknown.

Etymology. The specific epithet is Latin, comata [having long hair], referring to the very long setae on the gonocoxite posterolaterally.

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 4. Zygomyia comata sp. nov., male terminalia (holotype, MECN-EN-DIP-4859). A, B, ventral view; C, dorsal view; D, posterior view; E, gonostylus, dorsal view. Scale bar = 0.1 mm (A–D) and 0.05 mm (E). Abbreviations: gc = gonocoxite, gc pvm = posteroventral margin of gonocoxite, gst db = dorsal branch of gonostylus, gst vbdl = dorsal lobe of ventral branch of gonostylus, gst vbml = medial lobe of ventral branch of gonostylus, gst vbvl = ventral lobe of ventral branch of gonostylus.

FIGURE 20. Aedeagal apparatus of Zygomyia species from Ecuador (all photos, except Z. bicolor, are taken from holotypes). A, Z. comata sp. nov.; B, Z. geniculata sp. nov.; C, Z. longistyla sp. nov.; D, Z. bicolor Edwards, 1934 (MECN-EN-DIP-4873); E, Z. triseta sp. nov.; F, Z. talpaeforma sp. nov. Scale bar = 0.1 mm.