Zygomyia talpaeforma, 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 : 26-27

Zygomyia talpaeforma sp. nov.

( Figs 2H , 13A–E , 20F )

urn:lsid:zoobank.org:act:38EC81E7-0BF0-4D7B-8138-489DE5F3BB8D

Type material. HOLOTYPE ♂, 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 with terminalia in glycerine, INABIO; specimen code: MECN-EN-DIP-4868; one fore leg used for DNA extraction, GenBank accession number: OP747432 ) . PARATYPES: 1 ♂, same as holotype (mounted from alcohol, IZBE); 1 ♂, 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, ZFMK) .

Diagnosis. Distinguished by unique ventral branch of the gonostylus, which is broad, curved dorsad, exposed edgewise in ventral view and bears a protruding row of apical spines.

Description. Male (n = 2). Body length 2.3–2.6 mm. Wing length: 2.2–2.6 mm; ratio of length to width 2.54– 2.74.

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 1:1.33:1.77. Scape and pedicel yellow, first flagellomere yellow in basal half, other flagellomeres light brown. Flagellomeres cylindrical, first flagellomere 1.8 × as long as broad, fourth flagellomere 1.5 × as long as broad, apical flagellomere conical, 2.8 × 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 6–8 bristles of different lengths. Proepisternum with setae including 4–7 stronger bristles. Anepisternum with a number of posteriorly-directed short setae and 6–9 bristles of different lengths on dorsal part. Anepimeron with short setae and 3–4 bristles on dorsal part. Laterotergite with 3–4 dorsally-directed weak setae on dorsal half. Metepimeron with 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 few small setae on posterior side. Mid femur with 1–2 and hind femur with 3–4 apicoventral bristles. Mid tibia with 2 a, 5 d, 3-4 p and 1 v (one additional considerably shorter ventral seta can present). Hind tibia with 7 a and 6 d. Length ratio of femur to tibia for fore, mid and hind legs: 1.03–1.18, 1.09–1.10, 0.86–0.92. Length ratio of tibia to basitarsus for fore, mid and hind legs: 1.14–1.21, 1.52–1.53, 1.58–1.60. 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 and M 2 with sparse setae along whole length on dorsal surface. CuA with 2–5 apical setae on dorsal surface. rm somewhat shorter than m-stem. Costa not extending beyond R 4+5.

Abdomen. Brown with first two segments laterally somewhat lighter. Terminalia ( Figs 13A–E , 20F ) yellow to light brown. Posteroventral margin of gonocoxites medially widely conical. Ventral branch of the gonostylus large, flat, in ventral view exposed edgewise, curved dorsad, with (1) comb of large spines along posterior margin, (2) one curved megaseta at ventral margin anteriorly, and (3) group of three pointed megasetae at dorsal margin anteriorly. Dorsal branch of the gonostylus with (1) ventral part include three small digitate lobes: two more ventral ones bearing an apical curved megaseta, dorsal one bearing three apical setae, and (2) dorsal lobe, elongated, posteriorly bent, anterior half with sub-rectangular widening medially.Aedeagus large, apically blunt, extending over parameres posteriorly. Parameres broad, crescent-shaped. Gonocoxal apodemes large, medially curved, posteriorly widening, with well delimited posterolateral cut.

Female. Unknown.

Etymology. The specific epithet is derived from Latin, talpa [mole] and forma [appearance], as the shape of the ventral branch of the gonostylus with a row of apical spines resembles in lateral view fore paw of the Eurasian moles (Talpa spp.).

Figures

FIGURE 2. Habitus of Zygomyia species from Ecuador (all photos, except Z. bicolor, are taken from holotypes). A, Z. spinosa sp. nov.; B, Z. ximoi sp. nov.; C, Z. bicolor Edwards, 1934 (MECN-EN-DIP-4873); D, Z. uniordata sp. nov.; E, Z. napoensis sp. nov.; F, Z. trilobata sp. nov.; G, Z. triseta sp. nov.; H, Z. talpaeforma sp. nov. Scale bars = 1 mm.

FIGURE 13. Zygomyia talpaeforma sp. nov., male terminalia (holotype, MECN-EN-DIP-4868). A, ventral view; B, dorsal view; C, D, lateral view; E, gonostylus, dorsal view. Scale bar = 0.1 mm (A–D), 0.05 mm (E).

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.