Docosia polyspina Kurina, 2020

Ševčík, Jan, Burdíková, Nikola, Kaspřák, David & Kurina, Olavi, 2020, Five new Palaearctic species of Docosia (Diptera: Mycetophilidae), with updated molecular phylogeny of the genus, European Journal of Taxonomy 717, pp. 3-26 : 15-17

Docosia polyspina Kurina sp. nov.

urn:lsid:zoobank.org:act:53D312AC-5DAB-4B0D-AF1C-819CAC59965F

Figs 5 , 7C

Differential diagnosis

Docosia polyspina sp. nov. belongs to a large group of Palaearctic species that have a simple, undivided gonostylus, bearing a variable number of black spines in different positions (e.g., D. flavicoxa Strobl, 1900 , D. moravica Landrock, 1916 , D. dentata Ševčík et al., 2016 , D. matilei Ševčík & Laštovka, 2008 , D. kerkini , D. svanetica sp. nov., D. japonica sp. nov.). Docosia polyspina sp. nov. markedly differs from the other species in having the gonostylus with three long spines at the medial margin and the internal flange of the posteroventral margin of the gonocoxites with about 10 simple blunt spines laterally on both sides.

Etymology The name is combined from the Greek ‘πολύ’ (polú) ‘many’ and Latin ‘ spīna ’ ‘spine’, referring to the

number of black spines on internal flange of the gonocoxites posteroventrally.

Type material

Holotype

RUSSIA • ♂; Primorsky Krai, 3 km NW of Lukyanovka; 43°11′26.1″ N, 132°40′52.1″ E; 146 m a.s.l.; 9 May 2019; O. Kurina leg.; sweep net; mounted from ethyl alcohol; terminalia in glycerol; one fore leg used for DNA extraction; GenBank: MT293025 , MT293056 , MT293039 , MT293073 , MT293007 ; IZBE-0200401.

Description

Male (n = 1)

MEASUREMENTS. Length of wing 3.0 mm.

HEAD. Blackish with numerous pale setae. Three ocelli, lateral ones almost touching compound eyes, separated from eye margins by less than half of their own diameter. Mouthparts yellow to light brownish. Palpus yellowish, basal segment somewhat darker. Scape dark brown, pedicel and basal half of first flagellomere dark yellow, rest of flagellomeres brown, lighter than scape. First three flagellomeres cylindrical, about 1.5 times as long as broad, rest of flagellomeres moniliform, about as long as broad.

THORAX.All parts of thorax blackish brown, with light setae. Scutellum with numerous setae and pair of submarginal pale bristles about twice as long as scutellum. Antepronotum and proepisternum with pale bristles and short darker setae. Laterotergite and other pleural parts bare. Haltere pale yellow.

LEGS. All coxae yellow, with basal fifth of fore- and midcoxae, and basal third of hind coxa darkened. Trochanters brownish. All femora and tibiae yellow. Fore tibia apicomedially with semicircular tibial organ (anteroapical depressed area), without strong setae, only densely covered with fine setulae. Tarsi seem brownish because of dense setae.

WINGS. Hyaline, unmarked. Radial veins and r-m dark brown, other veins paler, m-stem faint, almost not traceable. Sc, Rs, m-stem, bm-m and basal two thirds of cu-stem asetose, other veins setose. Costa reaches to about one third of distance between R 5 and M 1. Sc ends in R at level of beginning of m-stem. Posterior fork begins well before anterior fork, approximately at level of basal fifth of r-m.

ABDOMEN. All dark brown with pale setae.

TERMINALIA ( Figs 5 A–E, 7C). Light brown, with gonostyli slightly lighter. Tergite 9 widening posteriorly, about 1.3 times as long as broad, posterior margin slightly concave, anterior margin with V-shaped medial cleft. Posteroventral margin of gonocoxites with lateral extensions, covered with dense aggregation of fine setae, setae longer at posterior margin. Internal flange of posteroventral margin drawn out to large, posteriorly rounded medial process, with about 10 simple blunt spines laterally on both sides and about 10 setae medially. Gonostylus simple, tapering, with (1) row of three blunt medially directed spines at medial margin, about twice as long as spines on internal flange of posteroventral margin of gonocoxites, (2) two extremely long apically curved setae, clearly deviating from other setae of terminalia, and (3) about 15 setae on apical half ventrally. Cercus with 11 combs of retinacula.

Female

Unknown.

Biology

Unknown.

Figures

Fig. 5. Docosia polyspina Kurina sp. nov., ♂, terminalia. A. Lateral view. B. Posterior view. C. Ventral view of gonostylus. D. Dorsal view of cerci. E. Dorsal view of tergite 9. F. Ventral view of aedeagal complex. G. Lateral view of aedeagal complex. Scale bars = 0.1 mm.

Fig. 7. Male terminalia, ventroposterior view. A. Docosia anatolica Ševčík sp. nov. B. D. japonica Kurina sp. nov. C. D. polyspina Kurina sp. nov. D. D. peloponnensis Ševčík sp. nov. E. D. svanetica Kurina sp. nov. Scale bars = 0.1 mm.