Docosia japonica 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 : 10-13

Docosia japonica Kurina sp. nov.

urn:lsid:zoobank.org:act:8D2164B1-0649-41BD-A65A-28434E54E1F4

Figs 3 , 7B

Differential diagnosis

By the structure of the male terminalia, D. japonica sp. nov. belongs to a group of Palaearctic species, as defined for D. polyspina Kurina sp. nov., and resembles D. kerkini Kurina & Ševčík, 2011 , D. polyspina sp. nov. and D. svanetica Kurina sp. nov. All species have a simple sickle- or crescent-shaped gonostylus with a row of spines on the medial margin. However, unlike the other species, D. japonica sp. nov. has four medially situated spines with the posteriormost one three times as long as the anterior three ( D. kerkini has 12 subequal spines, D. polyspina sp. nov. has 3 subequal spines and D. svanetica sp. nov. has 5 spines with the anteriormost one at the apex of the gonostylus and two times as long as the other). The posteroventral margin of the gonocoxites resembles somewhat D. selini Kurina, 2006 described from Kazakhstan and subsequently found in the Chimgan area in Uzbekistan, but both species can be well distinguished by the shape of the gonostylus.

Etymology

The species is named after its occurrence in Japan.

Type material

Holotype

JAPAN • ♂; Nagano Prefecture , Ueda, Sugadaira Kogen near SMRC; 36°31′18″ N, 136°21′03″ E; 1330 m a.s.l.; 26 Apr.–3 May 2015; A. Blanke leg.; Malaise trap in grassland; in ethyl alcohol; terminalia in glycerol; one fore leg used for DNA extraction; GenBank: MT293057 , MT293040 , MT293074 , MT293008 ; ZFMK-DIP-00067333.

Description

Male (n = 1)

MEASUREMENTS. Length of wing 3.8 mm.

HEAD. Black 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 light brownish. Palpus with basal three segments brown, 4 th segment light brown, 5 th segment yellowish. Scape dark brown, pedicel and all flagellomeres somewhat lighter. Flagellomeres cylindrical, about two times as long as broad.

THORAX. All parts of thorax blackish brown to black, with light setae. Scutum somewhat darker than lateral parts of thorax. Scutellum with numerous setae, marginal setae not arranged to distinct pairs. Antepronotum and proepisternum with pale bristles and short darker setae. Laterotergite and other pleural parts bare. Haltere pale yellow.

LEGS. All coxae, trochanters, femora and tibiae dark brown. Tibial spurs yellow. Tarsi dark yellow but seem brownish because of dense setae. Fore tibia apicomedially with semicircular tibial organ (anteroapical depressed area), without strong setae, only densely covered with fine yellow setulae.

WINGS. Hyaline, unmarked. Radial veins and r-m dark brown, other veins paler, m-stem faint. Sc, Rs,

m-stem, basal part of M 1, bm-m and basal one third 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. Dark brown with pale setae, first three segments with tergites laterally and sternites wholly yellowish.

TERMINALIA ( Figs 3 A–E, 7B). Brown, with gonostyli and posteroventral area of gonocoxites yellow. Tergite 9 subquadrate, about as long as broad, posterior margin straight, with submarginal row of prominent setae about twice as long as other vestiture on tergite. Posteroventral margin of gonocoxites with quadrate, posteriorly slightly widening medial process having lateral aggregations of dark setae, medially separated by stripe of light setae. Gonostylus simple, tapering, apical half bent medially, with (1) long and pointed medial spine at medial margin, (2) row of three more anterior, blunt spines at medial margin, about three times shorter than posterior spine, (3) medial surface bearing minute setae, and (4) lateral surface bearing about 15 fine setae medially. Cercus with 13 combs of retinacula.

Female

Unknown.

Biology

Unknown.

Figures

Fig. 3. Docosia japonica 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.