Ulomorpha Osten Sacken, 1869

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 Osten Sacken, 1869 Figs 1 , 2 , 3 , 4 , 5

Type species.

Limnophila pilosella Osten Sacken, 1860 by original designation ( Osten Sacken 1869: 232).

General description of Japanese species of Ulomorpha Osten Sacken, 1869.

General coloration shiny black, mainly yellow on legs, body clothed with relatively long setae.

Head with eye dichoptic, separated by about twice width of scape on dorsal part and about 1.5 times on ventral part; rostrum 2/3-3/4 length of scape; antenna 16-segmented, 3-4 times as long as head; scape cylindrical, about twice length of pedicel and as wide as pedicel; pedicel globular; flagellum with verticils, longer on middle segments, at most 2.5 times as long as each segment, shortest on apical segment, shorter than apical segment; basal flagellomeres (Figs 1B , 4B ) long-oval with pubescences ventrally, as long as 1/2-1 width of each segment; distal flagellomeres long and cylindrical; palpus 5-segmented, shortest on basal segment and longest on apical segment.

Thorax with prescutal pit roundish; tuberculate pit situated near anterior margin on prescutum; meron small, largely membranous on posterior part, separating mid and hind coxae by about 1/2 width of coxa; wing (Figs 1C , 2B , 3B, C , 4C ) covered with macrotrichiae except basal part; Sc end at level of distal 1/3 to tip of Rs; crossvein sc-r near tip of Sc; MA present; Rs origin near middle between MA and distal end of Rs; crossvein R2 indistinct, situated at basal 1/2-1/4 of R3; R3+4 very short, often absent; M1+2 not forked (forked in some Nearctic species); cell d closed; crossvein m-cu situated near middle of cell d; Cu curved posteriorly near wing margin; halter about half length of hind coxa; legs with tibial spurs 1 + 2 + 2; tarsomeres 1 to 3 each with 1 tarsal spur; claw about half as long as tarsomere 5, covered with small, hair-like setae on basal half, ventral margin smooth, without teeth; arolium present.

Male terminalia (Figs 1D-H , 2C-G , 3D-H , 4D-H ) with segment 9 ring-shaped; tergite 9 and sternite 9 fused laterally; tergite 9 with pair of small roundish lobes at posterior margin; sternite 9 widely concaved at middle of posterior margin; gonocoxite about 1.5 times as long as tergite 9, slightly wide on basal part; gonostyli 1/2-2/3 length of gonocoxite; outer gonostylus black, wide on basal part, tip narrowed into small curved spine; inner gonostylus slightly longer than outer gonostylus, gradually narrowed to tip; interbase bilobed distally, outer lobe narrow and directed posterodorsally, acute at tip; medial lobe larger and directed medially, narrowed to tip; each base of interbase extending medially and fused into bridge.

Ovipositor (Fig. 3I ) long, more than 1/3 as long as abdomen; cercus more than 1.5 times as long as tergite 10, weakly upcurved on distal part; hypogynial valve more than 1.5 times as long as sternite 8, almost straight, tip ending at near level of middle of cercus.

Figures

Figure 1. Ulomorpha amamiana Kato & Kolcsar, sp. nov. A habitus, male B basal part of antenna, lateral view C wing D male terminalia, dorsal view E tip of outer gonostylus, dorsal view F aedeagal complex, dorsal view G aedeagal complex, lateral view H interbase, posterodorsal view. Abbreviations: ad - aedeagus; fl - flagellomere; ib - interbase; ig - inner gonostylus; gc - gonocoxite; mib - medial lobe of interbase; og - outer gonostylus; oib - outer lobe of interbase; pb - pubescence; pd - pedicel; t 9 - tergite 9; vt - verticil. Scale bars: 3 mm (A, C); 0.1 mm (B, D, E-H).

Figure 2. Ulomorpha longipenis Kato & Kolcsar, sp. nov. A habitus, male B wing C male terminalia, dorsal view D tip of outer gonostylus, dorsal view E aedeagal complex, dorsal view F aedeagal complex, lateral view G interbase, posterodorsal view. Scale bars: 3 mm (A, B); 0.1 mm (C-G).

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 4. Ulomorpha polytricha Alexander, 1930. A habitus, male B basal part of antenna, lateral view 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. Scale bars: 3 mm (A, C); 0.1 mm (B, D-H).

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).