Dicranomyia (Erostrata) globulithorax Alexander 1924
Creators: name: Kato, Daichi
name: Tachi, Takuji
name: Gelhaus, Jon
Publisher: name: Zenodo
Year: 2018
Subjects: Biodiversity
Taxonomy
Animalia
Arthropoda
Insecta
Diptera
Limoniidae
Dicranomyia
Dicranomyia globulithorax

description: Dicranomyia (Erostrata) globulithorax Alexander, 1924
(Figs. 7, 36, 41)
Dicranomyia globulithorax Alexander, 1924: 547. Type locality: Japan, Hokkaido, Chitose-shi, Shikotsu;
Limonia (Limonia) globithorax globulithorax: Alexander, 1955: 278;
Dicranomyia (Erostrata) globithorax globulithorax: Savchenko & Krivolutskaya, 1976: 132; Savchenko, 1983: 138; Savchenko, 1989: 307; Savchenko et al, 1992: 342; Nakamura et al, 2014: 41; Oosterbroek, 2018.
Specimens examined: Holotype, male, JAPAN, Hokkaido, Shikotsu, 27.IX.1922, T. Esaki (USNM). Paratype, male, JAPAN: [Hokkaido], L. Shikotsu, 27.IX.1922, T. Esaki (USNM).
Diagnosis. General coloration (Fig. 36) brown to dark brown. Head blackish; palpus one segmented. Abdomen dark brown. Male genitalia with tergite 9 bearing a pair of rounded lobes on posterior margin (as in Fig. 4); gonostylus (Fig. 7) concaved on distal 1/6 of inner margin, covered with strong setae at tip.
Description. Male. Body length 4.8 mm. Wing length 6.2 mm.
Head. Dark brown. Antenna dark brown, pedicel almost as wide as basal flagellomeres, flagellar segments with distinct pale pubescence; palpus oval, one segmented.
Thorax. Brown, lateral sides of postpronotum and anepimeron near wing base weakly paler. Wing blackish tinged. Legs brown, coxae, trochanters, and base of femora paler. Halter brown.
Abdomen. Brown, sternite 7 with a small, conical internal sac on posterior margin (as in Fig. 10). Male genitalia with tergite 9 oval, bearing a pair of rounded lobes on posterior margin, each lobe separated by wide U- or V-shaped notch, longitudinal internal ridge distinct on middle of tergite 9 (as in Fig. 4); gonocoxite cylindrical, about as long as width of tergite 9, ventromesal lobe finger-shaped, about 1/3 as long as gonocoxite and 1.5–2 times as long as width (as in Fig. 4); gonostylus (Fig. 7) slightly shorter than gonocoxite and slightly wider on distal half than basal half, apex with outer edge produced about 1/5 as long as whole length of gonostylus, mesal surface of gonostylus weakly sclerotized and darkened, covered with strong setae, outer surface of gonostylus with a small protuberance bearing two setae near base; paramere (as in Figs. 5–6) with mesal-apical lobe slender, pointed at tip, lateral part of paramere produced into ribbon-like plate, curled laterally and ventrally, the plate 1/4 as long as width of paramere in lateral view; aedeagus (as in Fig. 5) cylindrical, narrowed near tip; tip shortly bilobed, directed ventrally.
Female. Not examined.
Distribution. Japan (Hokkaido, Shikoku (Fig. 41)), Russian Far East (Primorskiy kray, Kuril islands).
Remarks. As mentioned in the remark of D. globithorax, D. globithorax globulithorax is elevated to species rank based on the distinct differences in their male genitalia. This species is also somewhat similar to a Taiwanese species, D. (E.) melas (Alexander, 1934), but is differentiated from it by the following male genital structures: male genitalia (as in Figs. 4–6) with ventromesal lobe of gonocoxite longer, about 1.5–2 times as long as width (about as long as width in D. melas); mesal-apical lobe of paramere without a ridge-like short extension near base of dorsal margin (with a ridge-like short extension near base of dorsal margin D. melas).
description: Published as part of Kato, Daichi, Tachi, Takuji & Gelhaus, Jon, 2018, Revision of the subgenus Dicranomyia (Erostrata) Savchenko, 1976 (Diptera, Limoniidae) of Japan, pp. 181-194 in Zootaxa 4441 (1) on pages 184-186, DOI: 10.11646/zootaxa.4441.1.11, http://zenodo.org/record/1301981