Campylomyza angusta sp. nov.

Fig. 3 A – C

Type material examined.

Holotype: Korea • 1 ♂ (slide no. NIBRIN 0000941947); Gangwon-do, Pyeongchang-gun, Jinbu-myeon, Odaesan-ro, Mt. Odae, small valley before So-Myeong valley (Odae 1); 18 Apr. – 1 May 2020; D. Ham, S. Park leg.; deposited in NIBR.

Diagnosis.

Campylomyza angusta sp. nov. belongs to the ormerodi group of species where it is reminiscent of C. pubescens (Jaschhof and Jaschhof 2009) mainly due to cerci bearing strikingly large pubescence and short dorsal transverse bridge, which is almost not protruding beyond the ventrobasal margin. Campylomyza angusta sp. nov. is distinguished as follows. Gonostyli moderately convex posteriorly with narrowly rounded apex (Fig. 3 A, ↓ 6). Gonocoxites strongly protruding dorsomedially, ventral bridge short. The tegmen lacks shoulders (Fig. 3 C, ↓ 4), parameral apodemes long (Fig. 3 C, ↓ 5), apical points directed slightly laterally, mesal points short, weakly sclerotized, rounded apically (Fig. 3 C, ↓ 3).

Measurements.

Male adult (holotype): Body length 1.329 mm. Wing length 1.569 mm. Hind leg coxa 0.160 mm; femur 0.571 mm; tibia 0.567 mm; tarsomere I 0.330 mm; tarsomere II 0.153 mm; tarsomere III 0.109 mm; tarsomere IV 0.078 mm; tarsomere V 0.061 mm.

Description.

Male adult (holotype). Head. Postocular bristles seven. Antenna with 12 flagellomeres. Neck of fourth antennal flagellomeres shorter 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 eight setae. Wing length to width ratio 2.53. AntC ending beyond R 4 + 5 but before reaching M 4; ApicR 1 4.18 × length of Rs. CuA separated. Tarsomere I longer than tarsomere II. Claws sickle-shaped, fine toothed; empodia shorter than claws; pubescent. Terminalia. Tg 9 tapered towards apex with 13 setae apically. Ventral bridge of gonocoxites short, dorsal transverse bridge protruding only slightly beyond the ventrobasal margin. Ventral emargination deep, U-shaped. Ventromedial portion broad rounded, not protruding medially (Fig. 3 A, ↓ 1). Gonostyli rounded apically with semi-circular apical margin; excavated ventromedially, plump dorsally; setae denser towards apex. On tegmen, apical points not lamellate, pointed apically, directed slightly posterolaterally (Fig. 3 C, ↓ 2); mesal points weakly sclerotized, short, tapered basally, broadened at apical third, rounded apically (Fig. 3 C, ↓ 3). Tegmen shoulders indistinct (Fig. 3 C, ↓ 4). Parameral apodemes long, more than half-length of tegmen (Fig. 3 C, ↓ 5).

Etymology.

The specific epithet angusta in Latin means narrow, referring to the narrowness of the shoulder region of the tegmen in this species.