Campylomyza salicia, 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 salicia sp. nov.

Fig. 5 E – G

Type material examined.

Holotype: Korea • 1 ♂ (slide no. 19 Aya- 2); 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 . Paratypes: Korea • 5 ♂♂ (slides no. 19 AY-5 , 10, 13, 17, 19 AYa-13); same data and deposition as holotype • 1 ♂ (slide no. NIBRIN 0000919404 ); same data as holotype, deposited in NIBR .

Other material examined.

Korea • 2 ♂♂ (slides no. 19 AZ-6 , 9); NERC; 3–10 Apr. 2019; Y. J. Choi, H. G. Kim leg.; deposited in KU • 1 ♂ (slide no. 19 AX-4 ); NERC; 20–27 Mar. 2019; Y. J. Choi, H. G. Kim leg.; deposited in KU • 1 ♂ (slide no. NIBRIN 0000992640 ); NERC; 27 Mar. – 3 Apr. 2019; Y. J. Choi, H. G. Kim leg.; deposited in NIBR .

Diagnosis.

Campylomyza salicia sp. nov. is most similar to C. mohrigi (cf. illustration of Jaschhof and Jaschhof 2009: 109), especially having the elongated, tapering Gonostyli ventrally, not lamellate apical points and foliate dorsal processes which reaching to transverse brace on tegmen. However, C. salicia sp. nov. can be distinguished from C. mohrigi by following characteristics: 1) dorsal processes of tegmen sclerotized margin without sclerotized ridge (Fig. 5 G , ↓ 9); 2) the dorsal processes are directed dorsolaterally with a strongly sclerotized triangular apex; 3) parameral apodeme shorter than that of C. mohrigi (Fig. 5 G , ↓ 10).

Measurements.

Male adult (holotype): Body length 0.944 mm. Wing length 1.266 mm. Hind leg coxa 0.142 mm; femur 0.441 mm; tibia 0.463 mm; tarsomere I 0.275 mm; tarsomere II 0.123 mm; tarsomere III 0.103 mm; tarsomere IV 0.072 mm; tarsomere V 0.057 mm.

Description.

Male adult (holotype). Slightly smaller than other Campylomyza species. Head. Postocular bristles five. 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 six fine setae anteriorly. Wing length to width ratio 2.70. AntC ending beyond R 4 + 5 but before reaching M 4; ApicR 1 3.23 × length of Rs; CuA separated. Tarsomere I longer than tarsomere II. Claws slightly toothed; empodia small, narrow. Terminalia. Tg 9 tapered towards apex with 8 setae apically. Ventral bridge of gonocoxites half-length of gonocoxites; dorsal transverse bridge tapering, extending beyond ventrobasal margin. Ventral emargination U-shaped. Gonostyli elongated, blunt to slightly pointed apically, moderately convex apically; ventrosubapically constricted (Fig. 5 E , ↓ 7); excavated ventromesally; setae denser towards apex. On tegmen, apical points triangular shaped, not lamellate, pointed apically, directed posterolaterally (Fig. 5 G , ↓ 8); dorsal processes leaf-shaped, elongated slightly beyond transverse brace, with strongly sclerotized apex (Fig. 5 G , ↓ 9). Shoulders of tegmen well developed, thick. Transverse brace slightly extended, lobe shaped. Parameral apodemes short (Fig. 5 G , ↓ 10).

Etymology.

The species name salicia is derived from the Latin word salici, meaning ‘ willow, ’ in reference to the dorsal processes of the tegmen, which resembles the shape of a willow leaf.

Key to the Species of Korean Campylomyza

DNA barcode analysis and MOTU estimation

The 658 - bp COI sequences were analyzed, revealing 234 variable sites, of which 63 were parsimony informative. Within the genus Campylomyza , the interspecific divergences (p - distances) ranged from 6.18 % to 15.28 %. The mean distance across the entire dataset was 10.72 % (Suppl. material 1: table S 3). Intraspecific genetic distances varied from 0 % to 0.92 %. The species delimitation using the ABGD method delineated 17 Molecular Operational Taxonomic Units (MOTUs), including the outgroup. These MOTUs are illustrated by the color bars on the Neighbor Joining ( NJ) tree in Fig. 6 , corresponding with the delineations observed in the same NJ tree. All 17 MOTUs correspond to groups distinguished by their morphological characteristics.

Figures

Figure 2. Male morphology of Campylomyza aborigena Mamaev, 1998 (A – C) and Campylomyza ambulata sp. nov. (D – G) A gonocoxites, ventral view, slide no. NIBRIN 0000992639 B gonostylus, dorsal view, slide no. NIBRIN 0000992639 C tegmen, dorsal view, slide no. 19–38 D gonocoxites, ventral veiw, holotype E – G tegmen, dorsal view E holotype F paratype (slide no. NIBRIN 0000919403) G paratype (slide no. 19 AY- 9). Scale bars: 0.05 mm.

Figure 3. Male morphology of Campylomyza angusta sp. nov., holotype A – C and Campylomyza convexa sp. nov., holotype D – F: A gonocoxites, ventral veiw B gonostylus, dorsal view C tegmen, dorsal view D gonocoxites, ventral veiw E gonostylus, dorsal view F tegmen, dorsal view. Scale bars: 0.05 mm.

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.

Figure 5. Male morphology of Campylomyza odae sp. nov., holotype A – D and Campylomyza salicia sp. nov., holotype E – G: A gonocoxites, ventral view B gonostylus, dorsal view C tegmen, dorsal view D cerci, ventral view E gonocoxites, ventral view F gonostylus, dorsal view G tegmen, dorsal view. Scale bar: 0.05 mm.

Figure 6. Neighbor-joining (NJ) Kimura- 2 - parameter tree derived from the COI analysis of sixteen Korean Campylomyza species, with Peromyia trifida as the outgroup. Numbers at the nodes represent NJ bootstrap support values. The vertical purple color bar on the right represents results from the ABGD delimitation method.