Antocha (Antocha)

Podenas, Sigitas & Young, Chen W., 2015, Antocha crane flies from Taiwan (Diptera: Limoniidae: Limoniinae), Zootaxa 4048 (4), pp. 523-537 : 528-530

Antocha (Antocha) sp. close to Antocha (Antocha) streptocera Alexander, 1949

( Fig. 6 )

Diagnosis. This is a medium sized crane fly. Body generally grayish brown. Wings milky with indistinct light brown stigma. Ninth tergite of male genitalia simple, without additional structures on posterior margin, both gonostyli long, slender and arched. Paramere long, slender, rod-like. Distal part of aedeagus long, narrow, straight.

Description. Based on dry-mounted male. Body length: Male 4.2 mm. Wing length: Male 5.5 mm.

Head. Dorsally head brown, but covered with dense gray pruinosity. Antenna 16–segmented, 1.23 mm in male. Scape nearly cylindrical, yellowish. Pedicel wider distally, narrower basally, light brown. Both basal segments covered with sparse gray pruinosity. Basal flagellar segments light brown, distal segments brown. Basal flagellomeres spindle shaped, distal flagellomeres elongate. Apical segment oval, longer and wider than penultimate. Verticils dense, white, about three times as long as respective segments, thus antenna looks like in genus Ormosia . Whitish pubescence covering flagellomeres long and especially dense on ventral surface of segments. Rostrum brownish yellow. Palpus generally brown with yellowish base, dark brown apex. Palpomeres covered with yellowish, short, erect, scarce setae.

Thorax. Generally brown. Pronotum brown, covered with gray pruinosity. Mesonotal prescutum grayish brown with yellowish brown area surrounding pseudosutural fovea and gray frontal margin. Prescutum with four indistinct brown stripes. Median stripes separated by narrow gray median line. Mesonotal scutum darker than prescutum, brown, covered with dense gray pruinosity. Scutellum brown frontally, yellowish posteriorly, covered with scarce gray pruinosity. Mediotergite brown with yellowish postero-lateral margins, covered with bluish gray pruinosity. Pleuron generally yellowish brown with indistinct darker longitudinal line extending from neck to base of abdomen, line intense anteriorly, fading out posteriorly. Katepisternum brownish yellow, bearing few short setae. Wing subhyaline, milky. Stigma faded, nearly invisible. Wing venation typical for subgenus: discal cell closed, Rs very long and straight, basal deflection of CuA1 distinctly before branching point of M, anal angle big and nearly right-angled. Stem of haltere light gray with yellowish base. Knob infuscated. Haltere 0.68 mm long in male. Coxae yellowish brown, covered with gray pruinosity. Frontal surface of frontal coxae slightly infuscated. Trochanters brownish yellow, distal margin narrowly blackened. Femur light brown with yellowish base. Tibiae uniformly light brown. Tarsi light brown at base passing into brown distally. Male femur I: 4.2 mm long, II: 5.0 mm, III: 5.0 mm; tibiae I: 4.7 mm, II: 4.8 mm, III: 5.4 mm; tarsus I: 4.6 mm, III: 4.4 mm long. Claw with a single, small subbasal spine.

Abdomen. Abdominal tergites polished brown, caudal margins narrowly grayish. Tergites covered with sparse yellowish setae. Sternites light brown with light yellowish gray caudal margins.

Hypopygium. Male genitalia same color as abdomen. Ninth tergite ( Fig. 6 ) of male genitalia simple, without additional structures on posterior margin. Gonocoxite elongate, oval, having no extra lobes. Both outer and inner gonostyli long, slender and arched. Outer gonostylus darkened towards apex. Inner gonostylus fleshy, covered with scarce setae. Paramere long and slender, rod-like, not reaching tip of aedeagus. Distal part of aedeagus long, narrow, straight.

Distribution. Taiwan (Fig. 17).

Material examined. TAIWAN: Kaohsiung: Shanping, 640 m, J. Rawlins, C. Young, 23–31 March 1988, 1 ♂. Also compared with slide-mounted parts of Holotype of A. (A.) streptocera Alexander, 1949 .

Remarks. This species is morphologically very similar to A. (A.) streptocera Alexander, 1949 , which is known from the province of Fujian of mainland China. The only difference found in male terminalia is the parameres of specimen from Taiwan are shorter, but with longer aedeagus than that of Holotype. However, slide-mounted specimen is somewhat distorted and these differences are probably resulted from the distortion. Additional specimens from Fujian and from Taiwan are needed for further investigation.

Figures

FIGURE 6. Antocha (Antocha)? streptocera, male genitalia, dorsal aspect.