Tephritis okera ( Shinji, 1940 )

Han, Ho-Yeon, 2019, Ten species of the subfamily Tephritinae (Insecta: Diptera: Tephritidae) newly recorded in Korea, Journal of Species Research 8 (3), pp. 294-312 : 308

9. Tephritis okera ( Shinji, 1940)

ǧșŭẖṻƞ (ṵḍ) ( Fig. 8A- F )

Platensia okera Shinji, 1940: 2 (type locality - Japan, Honshu, Iwate Pref., Morioka City; type Shinji).

Tephritis okera : Sueyoshi, 1998: 124 (resurrected from synonymy of both T. separata and T. ismene ).

Tephritis separata ( T. okera as erroneous junior synonym): Ito, 1984: 248 (in synonymy of T. separata ): Wang, 1998: 302 (in synonymy of T. separata ).

Tephritis ismene ( T. okera as errorneous junior synonym): Korneyev, 1996: 123 (in synonymy of T. ismene ); Norrbom et al., 1999: 218 (in synonymy of T. ismene ).

Diagnosis. This is a typical looking Tephritis having two large dark wing markings joined each other: antero-medial marking and antero-subapical marking with rays. It can be readily distinguished from any other Korean Tephritis species by having a large number of hyaline spots of cells dm and cu 2 as follows ( Fig. 8C, E ): 1) cell dm with at least 12 hyaline spots recognized; and 2) cell cu 2 with over 20 variously sized hyaline spots.

Description of Korean material. Wing length 4.8-5.0 mm; most setae on head and thorax strong, grey, but most setulae white. Head yellowish brown with small normal non-geniculate mouthparts; genal seta strong, pale brown; with two grey frontal setae; anterior orbital seta grey but posterior seta white; ocellar seta grey, distinctly longer than anterior orbital seta. Thorax looks matte pale brownish grey due to yellowish brown ground color with grey pruinosity; notopleuron with anterior seta grey but posterior seta white, thick, about 2/3 as long as anterior one; both anepisternal setae grey with lower seta about 2/3 as long as upper one; katepisternal seta strong, grey; anepimeral seta strong grey; scutellum with apical setae crossed, about half as long as basal seta. Legs yellowish brown with fore femur with 6-7 pale brown postero-ventral setae; mid coxal seta strong, grey. Wing hyaline, essentially with 2 merged markings - dark antero-medial marking and antero-subapical marking with rays; cell c almost hyaline with pale grey spot in middle; pterostigma completely dark brown except for narrow pale brown postero-basal corner; cell r 1 posterior to cell c hyaline with pale grey spot, posterior to pterostigma completely dark, but, apical to pterostigma with 2 large hyaline areas divided by narrow longitudinal dark band, apical dark area (slightly smaller than pterostigma) often with tiny hyaline spot antero-medially; cell r 2 + 3 basally with hyaline area, posterior to pterostigma almost completely dark, large and much smaller hyaline spots connected to 2 large hyaline spots of cell r 1, apically with tiny hyaline spot near apex of vein R 2 + 3 plus larger hyaline spot posterior to it; basal half of cell br almost hyaline, posterior half dark with 2-3 small merged hyaline postero-basal spots; cell r 4 + 5 with small round hyaline spot just anterior to crossvein DMCu, apically with lying Y-ray ended across veins R 2 + 3 and R 4 + 5; cell m basically with 3 large hyaline spots, leaving 4 dark rays within cell, basal ray with 2-4 tiny hyaline spots; cell bm almost completely hyaline; cell dm with at least 12 hyaline spots recognized; cell cu 2 with over 20 variously sized hyaline spots; anal lobe also with at least 10 hyaline spots. Abdomen yellowish brown ground color with grey pruinosity; oviscape about as long as or slightly shorter than 3 preceding abdominal segments, shiny brown with basal 1/3 and apical tip dark brown.

Material examined. KOREA: Gangwon-do , Inje-gun , Buk-myeon , Mt. Maebongsan , N37°56 ʹ 43.1 ʺ E128° 13 ʹ 40.0 ʺ, col. 17.IX.2015, em. 27.X.2017, ex Atractylodes japonica Koidz., H. - Y. Han et al., 5♂ 5$; Inje-gun , Deokjeok-ri , Mt. Hanseoksan, N38°03 ʹ 05 ʺ E128° 15 ʹ 23 ʺ, 1114 m, 10.VI.2016, H.Y. Han et al., 1$; Jeongseon-gun, Nammyeon, Mt. Mindungsan, from Yupyeongri to 1119 m peak, N37°16 ʹ 15 ʺ E128°46 ʹ 30 ʺ, 24.VI.2005, H.-Y. Han et al., 2♂; Wonju-si, Heungeop-myeon, Maeji-ri, Yonsei University Campus, 7.VII.2008, Y.B. Lee, 1$; ditto, 18.VI.2009, Y.B. Lee, 1$. All deposited in YSUW .

Distribution. Korea, Japan (Honshu).

Biology. This species infests flower heads of Atractylodes japonica Koidz. in Korea (new records) and Japan ( Shinji, 1940; Sueyoshi, 1998). In Korea, September collected A. japonica flowers yielded the flies in October of the same year.

Remarks. The new Korean name of this species refers to its host plant.

Figures

Fig. 8. Tephritis okera (Shinji, 1940). A. male, dorsal view; B. female, dorsal view; C. male, lateral view, D. male, dorsal view; E. female, lateral view; F. female dorsal view.