Campylomyza hori, 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 hori sp. nov.

Fig. 4 D – F

Type material examined.

Holotype: Korea • 1 ♂ (slide no. 19 I-5 ); Gangwon-do, Jeongseon-gun, Jeongseon-eup, Hoedong-ri, 870, Gariwangsan Recreational Forest (Gariwang); 13 Apr. – 12 May 2019; D. Ham, S. Park leg.; deposited in KU . Paratype: Korea • 1 ♂ (slide no. NIBRIN 0000919401 ); same data as holotype and deposited in NIBR .

Other material examined.

Korea • 2 ♂♂ (slides no. NIBRIN 0000992654 , NIBRIN 0000992655 ); Sobaek ; 6 May – 6 Jun. 2019; D. Ham, S. Park leg.; deposited in NIBR .

Diagnosis.

Campylomyza hori sp. nov. is most similar to C. mohrigi Jaschhof, 2009 , especially in having the apical points divided, and the dorsal processes with sclerotized ridge, subtriangular apex on tegmen. However, C. hori sp. nov. can be distinguished from C. mohrigi by the following characteristics: 1) Necks of antennal flagellomeres longer than nodes; 2) Gonostyli slightly longer and narrower (Fig. 4 E ); 3) Dorsal processes wider, margin sclerotized, with subtriangular apex, center membranous (Fig. 4 F , ↓ 13) vs. narrower, leaf-shaped with sclerotized ridge and points apically in C. mohrigi .

Measurements.

Male adult (holotype). Body length 1.441 mm, wing length 1.645 mm. Hind leg coxa 0.156 mm; femur 0.607 mm; tibia 0.647 mm; tarsomere I 0.351 mm; tarsomere II 0.180 mm; tarsomere III 0.141 mm; tarsomere IV 0.088 mm; tarsomere V 0.070 mm.

Description.

Male adult (holotype). Head. Postocular bristles three. Antenna with 12 flagellomeres. Neck of fourth antennal flagellomere longer than 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 five fine setae anteriorly. Wing length to width ratio 2.47. AntC ending beyond R 4 + 5 but before reaching; ApicR 1 2.77 × length of Rs. CuA separated. Tarsomere I longer than tarsomere II. Claws sickle-shaped, weakly toothed; empodia as long as claws; pubescent. Terminalia. Tg 9 tapering towards apex with six fine setae apically. Ventral emargination deep, U-shaped, ventral bridge short. Dorsal transverse bridge broadly rounded apically, slightly extended beyond ventrobasal margin (Fig. 4 D , ↓ 10). Gonostyli elongated apically, curved anteroventrally, constricted ventrosubapically (Fig. 4 D , ↓ 11) with fine setae denser towards apex; incised dorsomesally. On tegmen, apical points pointed, directed posteriorly (Fig. 4 F , ↓ 12); dorsal processes broad basally, constricted medially, pointed apically (Fig. 4 F , ↓ 13), directed anterodorsally, with strongly sclerotized margin basally; mesal points faint, short, pointed (Fig. 4 F , ↓ 14). Tegmen shoulders almost angular, equipped with several small bumps laterally (Fig. 4 F , ↓ 15). Transverse brace with lobe-like dorsal extensions. Ejaculatory apodeme swelling medially (Fig. 4 D , ↓ 16), narrow basally.

Etymology.

The species epithet hori originates from the Korean native term, pronounced ‘ hori - hori - hada’, an adjective describing a slender or tapered part. This name specifically denotes the narrowed part of the gonostyli.

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.