Ulomorpha nigricolor Alexander, 1924

Kato, Daichi, Watanabe, Kozo & Kolcsar, Levente-Peter, 2020, Synopsis of the genus Ulomorpha Osten Sacken, 1869 (Diptera, Limoniidae) in Japan, ZooKeys 999, pp. 147-163 : 147

Ulomorpha nigricolor Alexander, 1924 Figs 3 , 5A

Ulomorpha nigricolor Alexander 1924: 75 (type locality: Japan, Honshu I., Gunma or Fukushima, Lake Oze-numa); Alexander 1953a: 82; Alexander 1953b: 68; Nakamura 2014: 20; Oosterbroek 2020.

Material examined.

Holotype ♂. Japan, Honshu, Lake Ozenuma, on boundary between Iwashiro-no-kuni and Kotsuke-no-kuni (between Fukuoka and Gunma); altitude 5460 feet; 36°55.62'N, 139°18.23'E (rough coordinate); 26 Jul. 1923; T. Esaki leg. (USNM).

Non-types. Japan: [Honshu] • 1♀; Aomori, Nishimeya-mura; alt. 275 m; 40°31.39'N, 140°13.93'E; 23. Jun. 2012; D. Kato leg. (BLKU) • 1♂; same data as previous except 24. Jun. 2012 • 2♂, 1♀; Aomori, Nishimeya-mura, Kawaratai, Shirakami Nature Observation Garden; alt. 225 m; 40°31.13'N, 140°12.89'E; 21 Jun. 2013; D. Kato leg. (BLKU) • 1♂; Aomori, Nakadomari-machi, Ôsawanai, Ôsawanai Pond; alt. 35 m; 40°56.78'N, 140°27.74'E; 15 May 2014; D. Kato leg. (BLKU) • 1♂; same data as previous except 24 May 2014 • 1♂; Aomori, Towada-shi, Okuse, Tsutanuma Path; alt. 470 m; 40°35.45'N, 140°57.42'E; 23 May 2014; D. Kato leg. (BLKU) • 1♀; Iwate, Hachimantai-shi, near Tȏshichi Spa; alt. 1340 m; 39°56.55'N, 140°52.08'E; 28 Aug. 2014; D. Kato leg. (BLKU) • 1♂; Niigata, Echigo, Iwafune, Mt Zao; 38°4.64'N, 139°28.57'E (rough coordinate, altitude unknown); 3 May 1955; K. Baba leg. (USNM) • 1♀; Gifu, Mino, Sakauchi; 35°36.41'N, 136°22.96'E (rough coordinate, altitude unknown); 9 Jun. 1957; Mishima leg. (USNM) • 5♂, 4♀; Okayama, Maniwa-shi, Hiruzen-Shimotokuyama; alt. 780 m; 35°19.76'N, 133°35.84'E; 17 May 2015; D. Kato leg. (BLKU) • 2♂, 2♀; Okayama, Maniwa-shi, Hiruzen-Kamifukuda, Nawashirodani-gawa River; alt. 600 m; 35°19.19'N, 133°36.49'E; 29 Apr. 2016; D. Kato leg. (BLKU) • 1♂; Hiroshima, Akiôta-chô, Yokogô; alt. 890 m; 34°35.65'N, 132°8.7'E; 18 May 2015; D. Kato leg. (BLKU). [Shikoku] • 1♂; Ehime, Kumakôgen-chô, Nishidani, near Prefectural road 328; alt. 1430 m; 33°34'N, 132°56.2'E; 17 Jun. 2019; D. Kato leg. (BLKU) • 2♂, 2♀; same data as previous except alt. 1387 m; 33°33.89'N, 132°56.1'E; L.-P. Kolcsár leg. (CKLP) • 4♂; Ehime, Saijô-shi, Nishinokawa-Tei, Mt Ishizuchi-san; alt. 1530 m; 33°45.29'N, 133°9.19'E; 16 Jun. 2019; D. Kato leg. (BLKU) • 2♂; same data as previous except alt. 1480 m; 33°45.3'N, 133°9.23'E; 16 May 2019; L.-P. Kolcsár leg. (CKLP) • 1♂, same data as previous except 16 Jun. 2019. [Kyushu] • 3♂; Miyazaki, Takachiho-chô, Gokasho, Mt Sobo-san, near Kitadani trailhead; alt. 1150 m; 32°49.36'N, 131°19.64'E; 22 May 2019; D. Kato leg. (BLKU) • 5♂, 1♀; same data as previous except alt. 1182 m; 32°49.36'N, 131°19.64'E; L.-P. Kolcsár leg. (CKLP).

Diagnosis.

Body blackish. Vertex sparsely pruinose, anterior part largely polished. Flagellomeres oval on basal 2-4 segments; ventral sides with pubescences on basal 2-6 segments. Prescutum polished, with narrow longitudinal line of pruinosity at middle. Wing brownish tinged, with oval, dark-brown stigma and dark spot or seam each on Rs origin, anterior part of cord, crossvein m-cu, and outer end of cell d; dark spot at tip of A2 sometimes present. Halter yellowish. Interbase with outer lobe as long as medial lobe in dorsal view; medial lobe medial to base of outer lobe about 3.5 times as long as wide. Aedeagus with rod-shaped distal part, twice as long as wide and weakly curved ventrally.

Description.

Male. Body length 5.5-10.1 mm, wing length 5.3-10.0 mm.

Head: subnitidous black, sparsely dusted with gray pruinosity; vertex with brighter gray pruinosity at anterior end; anterior part of vertex largely shiny except anterior end. Rostrum and mouthparts dark brown. Antenna with scape and pedicel dark brown; flagellum dusky yellow to dark brown; basal 2-4 flagellomeres oval; basal 2-6 segments covered with pubescences ventrally.

Thorax: subnitidous black, sparsely dusted with brownish pruinosity; polished and pruinosity absent on prescutum and most of scutal lobe; postpronotum sometimes yellowish; prescutum with narrow longitudinal line of pruinosity at middle in whole length, sometimes anterior part of this line indistinct. Wing (Fig. 3B, C ) tinged with brown; basal and costal regions proximal to cord yellowish; stigma oval, dark brown, faint in outline; veins dark brown, yellowish on Sc and basal part of wing; dark, wide seam on fork of Rs to crossvein r-m; narrow, dark seam on each of crossvein m-cu and outer end of cell d, but one on latter sometimes indistinct; dark small spot at Rs origin and sometimes with additional one at tip of A2 (Fig. 3C ), this anal spot usually present in specimens from southern part of Japan. Halter yellow to pale yellow. Legs mainly yellow to dusky yellow; fore coxa dark on basal 1/2, sometimes entirely so; mid and hind coxae yellow to dark brown, sometimes dark at bases in case of yellowish coxae; femora narrowly dark at tips, dark area on fore femur sometimes occupying distal 1/3; tibiae narrowly dark at tips; tarsi weakly dark from tip of tarsomere 1 to apical segment.

Abdomen: subnitidous dark brown to black, sparsely covered with brownish pruinosity.

Male terminalia (Fig. 3D-H ): caudal margin of tergite 9 almost straight or weakly convex at middle, with shallow U-shaped notch at center. Outer gonostylus in dorsal view (Fig. 3E ) relatively wide on distal part, tip narrowed and curved anteriorly, concaved margin with indistinct teeth. Interbase with outer lobe as long as medial lobe in dorsal view (Fig. 3F ); outer lobe wide at base, inner basal end situated near middle of medial lobe (Fig. 3H ); medial lobe strongly narrowed and rod-shaped on distal half, distal part medial to base of outer lobe about 3.5 times as long as wide (Fig. 3H ); Aedeagus with rod-shaped distal part, twice as long as wide and tip weakly curved ventrally (Fig. 3G ).

Female. Body length 6.3-9.6 mm, wing length 5.4-8.2 mm. Generally resembling male.

Ovipositor (Fig. 3I ): dark brown; yellow on cercus, hypogynial valve, and distal 1/4-1/3 of tergite 10; cercus 2-2.5 times as long as tergite 10.

Distribution.

Japan (Hokkaido, Honshu, Shikoku, and Kyushu islands) (Fig. 5A ) and North Korea.

Remarks.

This species is easily distinguished from the other species of the genus by the following combination of characters: thorax and abdomen excluding legs dark brown to black; wing with distinct dark areas each at origin of Rs, on fork of Rs to crossvein r-m, and outer end of cell d (Fig. 3B, C ).

Figures

Figure 3. Ulomorpha nigricolor Alexander, 1924. A habitus, male B, C wing D male genitalia, dorsal view E tip of outer gonostylus, dorsal surface F aedeagal complex, dorsal view G aedeagal complex, lateral view H interbase, posterodorsal view I female ovipositor, lateral view. Abbreviations: cr - cercus; hv - hypogynial valve; s - sternite; t - tergite. Scale bars: 3 mm (A-C); 0.1 mm (D-H); 0.3 mm (I).

Figure 5. Distribution map of Japanese species of Ulomorpha. A U. amamiana Kato & Kolcsar, sp. nov. (orange), U. nigricolor Alexander, 1924 (blue), U. polytricha Alexander, 1930 (green) B U. longipenis Kato & Kolcsar, sp. nov. (red).