Dicranomyia (Erostrata) globulithorax Alexander, 1924

Kato, Daichi, Tachi, Takuji & Gelhaus, Jon, 2018, Revision of the subgenus Dicranomyia (Erostrata) Savchenko, 1976 (Diptera, Limoniidae) of Japan, Zootaxa 4441 (1), pp. 181-194 : 184-186

publication ID	https://doi.org/ 10.11646/zootaxa.4441.1.11
publication LSID	lsid:zoobank.org:pub:E8507163-0F19-4BF2-8917-2E6C2C7A53A2
DOI	https://doi.org/10.5281/zenodo.5970506
persistent identifier	https://treatment.plazi.org/id/BD535E3E-FFAA-B66A-FF6E-80D8FB83FE8A
treatment provided by	Plazi
scientific name	Dicranomyia (Erostrata) globulithorax Alexander, 1924
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Treatment

Dicranomyia (Erostrata) globulithorax Alexander, 1924 View in CoL

( Figs. 7 View FIGURES 4–13 , 36 View FIGURES 35–40 , 41 View FIGURES 41–44 )

Dicranomyia globulithorax Alexander, 1924: 547 View in CoL . Type locality: Japan, Hokkaido, Chitose-shi, Shikotsu ;

Limonia (Limonia) globithorax globulithorax: Alexander, 1955: 278 ;

Dicranomyia (Erostrata) globithorax globulithorax: Savchenko & Krivolutskaya, 1976: 132 View in CoL ; 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 View FIGURES 35–40 ) 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 View FIGURES 4–13 ); gonostylus ( Fig. 7 View FIGURES 4–13 ) 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 View FIGURES 4–13 ). 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 View FIGURES 4–13 ); 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 View FIGURES 4–13 ); gonostylus ( Fig. 7 View FIGURES 4–13 ) 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 View FIGURES 4–13 ) 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 View FIGURES 4–13 ) cylindrical, narrowed near tip; tip shortly bilobed, directed ventrally.

Female. Not examined.

Distribution. Japan (Hokkaido, Shikoku ( Fig. 41 View FIGURES 41–44 )), 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 View FIGURES 4–13 ) 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 ).