Campylomyza cornigera, Ham & Bae, 2025

Ham, Daseul & Bae, Yeon Jae, 2025, Taxonomic study of the genus Campylomyza Meigen (Diptera, Cecidomyiidae) in Korea with descriptions of seven new species, ZooKeys 1223, pp. 221-245 : 221-245

Campylomyza cornigera sp. nov.

Fig. 4 A – C

Type material examined.

Holotype: Korea • 1 ♂ (slide no. 19 Aya- 8); Gyeongsangbuk-do, Yeongyang-gun, Yeongyang-eup, Gowol-gil, 23, National Endangered Species Restoration Center (NERC); 10–17 Apr. 2019; Y. J. Choi, H. G. Kim leg.; deposited in KU . Paratype: Korea • 1 ♂ (slide no. NIBRIN 0000857558 ); KUF; 2–8 Apr. 2017; D. Ham leg.; deposited in NIBR .

Other material examined.

Korea • 1 ♂ (slide no. NIBRIN 0000992637 ); Odae 1 ; 18 Apr. – 1 May 2020; D. Ham, S. Park leg.; deposited in NIBR .

Diagnosis.

Campylomyza cornigera sp. nov. is most similar to C. nigroliminata Mamaev, 1998 (cf. Jaschhof and Jaschhof 2021: fig. 30 A, B), especially in having lamellate apical points of the tegmen that are rounded apically and pointed processes directed anterolaterad (Fis. 4 C, ↓ 5, 6), and mesal processes are directed anteriorly (Fig. 4 C , ↓ 7). However, C. cornigera sp. nov. can be distinguished from C. nigroliminata by the following characteristics: 1) Pointed processes directed anterolaterally of apical points slightly curved; 2) Dorsal processes missing; 3) Tegmen shoulders indistinct.

Measurements.

Male adult (holotype): Body length 1.315 mm. Wing length 1.574 mm. Hind leg coxa 0.141 mm; femur 0.539 mm; tibia 0.515 mm; tarsomere I 0.302 mm; tarsomere II 0.142 mm; tarsomere III 0.105 mm; tarsomere IV 0.062 mm; tarsomere V 0.056 mm.

Description.

Male adult (holotype). Head. Postocular bristles seven. Antenna with 12 flagellomeres. Neck of fourth antennal flagellomeres as long as node. Node with one complete and two incomplete crenulate whorls with sensory hairs, two incompletely collar-shaped sensilla distally. Palpus 4 - segmented; fourth segment longest. Thorax. Preepisternum with 1–9 setae. Wing length to width ratio 2.58. AntC ending beyond R 4 + 5 but before reaching M 4; ApicR 1 3.08 × length of Rs. CuA separated. Tarsomere I longer than tarsomere II. Claws sickle-shaped, toothed; empodia longer than claws, slightly broaden apically; pubescent. Terminalia. Tg 9 tapered towards apex with seven or eight fine setae apically. Ventral bridge of gonocoxites long (Fig. 4 A , ↓ 1), with U-shaped emargination; dorsal transverse bridge narrowly tapering, extending far beyond basal margin (Fig. 4 A , ↓ 2). Ventromedial portion of gonocoxites almost angular (Fig. 4 A , ↓ 3). Gonostyli narrowly rounded to pointed apically (Fig. 4 A , ↓ 4), moderately convex posteriorly, and slightly excavated medially, plump dorsally; setae denser towards apex. Tegmen long and narrow, apical points sclerotized, short, stout, and broadly rounded apically (Fig. 4 C , ↓ 5); a pair of strongly sclerotized processes directed dorsolaterally (Fig. 4 C , ↓ 6); true dorsal processes missing. Mesal points of tegmen slightly sclerotized, narrowly long, directed anteriorly (Fig. 4 C , ↓ 7). Shoulders of tegmen inconspicuous; width between apices of shoulders narrower than processes directed dorsolaterally. Transverse brace rib-shaped (Fig. 4 C , ↓ 8). Parameral apodemes long (Fig. 4 C , ↓ 9). Ejaculatory apodeme of typical Campylomyza outline.

Etymology.

The species epithet cornigera , derived from Latin meaning ‘ having horns, ’ refers to the horn-shaped processes on the tegmen that are directed dorsolaterally.

Figures

Figure 4. Male morphology of Campylomyza cornigera sp. nov., holotype A – C and Campylomyza hori sp. nov., holotype D – F: A gonocoxites, ventral view B gonostylus, dorsal view C tegmen, dorsal view D gonocoxites, ventral view E gonostylus, dorsal view F tegmen, dorsal view. Scale bars: 0.05 mm.