Dichomeris magnimacularis Li & Park

Zhao, Shengnan, Park, Kyu-Tek, Bae, Yang-Seop & Li, Houhun, 2017, Dichomeris Hübner, 1818 (Lepidoptera, Gelechiidae, Dichomeridinae) from Cambodia, including associated Chinese species, Zootaxa 4273 (2), pp. 216-234 : 224-225

Dichomeris magnimacularis Li & Park , sp. nov.

Figs 8 , 21 , 31 .

Type material. Holotype ♂, CHINA: Houhe (30°12'N, 116°40'E), Wufeng , Hubei Province, 1000 m, 12.vii.1999, leg. Houhun Li, genitalia slide No. L00129 ( NKU) . Paratypes: CHINA: Hubei Province: 2♂, 10.vii.1999, other same data as for holotype ; Guizhou Province: 1♀, Huguo Temple (27°55'N, 108°39'E), Mt. Fanjing , 1300 m, 3.viii.2001, leg. Houhun Li and Xinpu Wang ; 1♂, Heiwan (27°51'N, 108°47'E), Mt. Fanjing , 530 m, 3.vi.2002, leg. Xinpu Wang ; Hainan Province: 1♀, Duowenling (19°28'N, 109°27'E), 120 m, 1.v.2009, leg. Bingbing Hu and Qing Jin, genitalia slide No. ZH 09066 ( NKU) ; Sichuan Province: 1♂, Mt. Qingcheng (30°54'N, 103°35'E), 11.vii.1980 ( IZCAS) ; 3♂, Jianfugong (30°54'N, 103°34'E), 18.vii.1980 ( IZCAS) ; Hong Kong: 1♂, Cheung Shek Pai, Po Toi Island UTM: 50Q KK 169535 , 40 m, 10.x.2008, 125W MV tall shrub/feng shui wd, leg. R. C. Kendrick genitalia slide No . ZSN16069 (KFBG); CAMBODIA: 1♂, Seima (12°21'N, 107°19'E), Mondul Kiri Prov., 14.vii.2013, leg. Y. S. Bae et al., genitalia slide No. CIS-6688 ( INU) .

Diagnosis. This species is similar in the male genitalia to D. rasilella (Herrich-Schäffer, 1854) . It differs in that the vinculum has short semicircular lateral lobes arising before middle of vinculum arm, the sicae are slightly dilated distally and toothed on lateral margin before apex, and the aedeagus has two sclerotized, narrow and small lobes from the zone in the male genitalia; the apophyses anteriores are 1/4 the length of the apophyses posteriores and dilated apically, and the ductus seminalis arises from the posterior part of the corpus bursae in the female genitalia. In D. rasilella , the vinculum has no lateral lobes, the sicae are neither dilated distally nor toothed apically, and the aedeagus has one sclerotized lobe from the zone; the slender apophyses anteriores are about 1/2 the length of the apophyses posteriores, and the ductus seminalis arises from posterior part of the ductus bursae ( Li, 2002: 386, Figs 438, 439, Pl. 28: Fig. 224).

Description. Adult ( Fig. 8 ) wingspan 15.0–18.0 mm. Head greyish yellow, vertex brown laterally, yellow behind antenna. Ocellus absent. Labial palpus with second segment about three times length of diameter of eye, with dirty white-tipped triangular scale tuft on dorsal surface; first and second segments dark brown on outer surface, greyish brown on inner surface except yellow at base of second segment; third segment with basal 3/4 yellow, scattered with dark brown scales on dorsal surface, distal 1/4 dark brown. Antenna with scape dark brown on dorsal surface, yellow on ventral surface; flagellum alternately dark brown and grey on dorsal surface, yellow on ventral surface. Thorax grey; tegula with basal half greyish brown to brown, distal half greyish yellow; mesothorax with gold hair pencils arising from anepisternum in male. Forewing with costal margin almost straight, apex bluntly rounded, termen obliquely straight; ground color greyish brown mixed with dark brown; spots dark brown, surrounded by greyish yellow: discal spot large, elongate ovate, discocellular spot smaller, plical spot small and at middle of fold; greyish yellow fascia from before 3/4 of costal margin to before tornus, curved outward medially; dark brown dots along distal 1/5 of costal margin and termen; fringe alternately greyish yellow and greyish brown in basal half, grey in distal half. Hindwing and fringe grey, fringe with basal line yellow. Fore- and midlegs dark brown on outer surface except tibiae and tarsi yellow at apex of each segment, greyish white on inner surface; hindleg with femur greyish brown on outer surface, greyish white on inner surface, tibia and tarsus yellowish white, tarsus mixed with greyish brown on outer surface. Abdomen brown, yellow at middle ventrally and apex.

Male genitalia ( Fig. 21 ). Uncus rounded on posterior margin, setose on ventral surface; anterior margin concave in semicircle ventrally. Gnathos strongly curved at 2/5; culcitula large, rounded. Valva broadened from base to bluntly rounded apex, slightly shorter than tegumen-uncus complex; valvella digitate, about 1/3 length of valva, with sparse setae. Setose patch stout, columnar. Vinculum height slightly less than length of tegumen-uncus complex; lateral lobes arising from before middle of vinculum arm, semicircular, setose distally. Saccal region narrow, slightly concave medially on anterior margin. Sicae with basal 1/4 fused, quadrate, distal 3/4 separated in narrow U shape; lateral lobes slightly dilated distally, toothed on lateral margin before apex, with sparse setae between 1/2 and 3/4, slightly asymmetrical: right lobe reaching basal 1/4 of vinculum arm, left lobe about 4/5 length of right lobe. Aedeagus shuttle-shaped; two sclerotized, short and narrow lobes from zone, sharp apically, dorsal lobe slightly longer than ventral lobe.

Female genitalia ( Fig. 31 ). Apophyses anteriores short, dilated apically, less than 1/4 length of apophyses posteriores. Eighth tergite with posterior margin gently arched; eighth sternite with anterior margin protruding medially in rectangle. Antrum broad and short, inverted trapeziform. Ductus bursae with basal 2/3 slender; distal 1/3 broadened toward corpus bursae, with sclerotized plate extending laterally to corpus bursae. Corpus bursae large, oval; ductus seminalis arising from near entrance of corpus bursae at left side, sclerotized basally; accessory bursae arising from anterior 1/4 of ventral wall.

Distribution. Cambodia (Mondul Kili), China (Guizhou, Hainan, Hong Kong, Hubei, Sichuan, Zhejiang).

Etymology. The specific name is derived from the Latin magni- and macularis, referring to the large oval dark brown discal spot on the forewing.

Figures

FIGURES 8 – 13. Adults of Dichomeris spp. 8, D. magnimacularis sp. nov., paratype, male; 9, D. hainanensis sp. nov., paratype, male; 10, D. microsphena Meyrick, male; 11, D. cambodiensis sp. nov., holotype, male; 12, D. matsumurai Ponomarenko & Ueda, female; 13, Dichomeris acutivalvata sp. nov., holotype, male. Scales = 5.0 mm.

FIGURES 20 – 25. Male genitalia of Dichomeris spp. 20, D. obsepta (Meyrick), genitalia slide No. ZSN 15276; 21, D. magnimacularis sp. nov., holotype, genitalia slide No. L 00129; 22, D. hainanensis sp. nov., paratype, genitalia slide No. NKLEP 001; 23, D. microsphena Meyrick, genitalia slide No. 6724; 24, D. cambodiensis sp. nov., holotype, genitalia slide No. 6698; 25, D. matsumurai Ponomarenko & Ueda, male, genitalia slide No. 6685. Scales = 0.5 mm.

FIGURES 31 – 34. Female genitalia of Dichomeris spp. 31, D. magnimacularis sp. nov., paratype, genitalia slide No. ZH 09066; 32, D. hainanensis sp. nov., paratype, genitalia slide No. ZSN 15350; 33, D. microsphena Meyrick, genitalia slide No. ZH 09147; 34, D. matsumurai Ponomarenko & Ueda, genitalia slide No. 6697. Scales = 1.0 mm.