Ditrigona parva Jiang & Han, 2022

Guo, Xiao-Jiang, Cheng, Rui, Jiang, Shan, Xue, Da-Yong & Han, Hong-Xiang, 2022, Four new species of Ditrigona Moore (Lepidoptera, Drepanidae) in China and an annotated catalogue, ZooKeys 1091, pp. 57-98 : 57

20. Ditrigona parva Jiang & Han sp. nov.

Figs 21-22 , 65 , 99 , 132 , 164

Description.

Head and thorax almost identical to those of D. sinespina . Forewing length: ♂11.5 mm, ♀14 mm. Antemedial line almost straight apart from an inward bend at costa. Outer line of the double submarginal lines serrate. Anal margin of hind wing elongate, with relatively large tail process. Fringes brown. Forewing underside with costa brown at basal half.

Male genitalia. Uncus bifurcate over whole length, both sides broad. Socii large, terminally semicircular, scobinate. Valva small, distal margin shallowly concave, posterior protrusion rounded. Saccus blunt and rounded. Juxta with posterior margin almost straight. Aedeagus very stout; cornutus a large oval spinose patch. Eighth tergite quadrate, with a pair of small anterior apodemes; eighth sternite quite small, posterior margin slightly convex.

Female genitalia. Papillae analis short; apophyses anteriores moderate, broad basally. Ostium bursae large; ductus bursae indiscernible; corpus bursae rounded, posteriorly with a large wrinkled sclerotized area and accessory sac, signum short and narrow.

Diagnosis.

The wing pattern is very close to that of D. uniuncusa . The antemedial line on the hind wing is straight in D. parva , but slightly convex in D. uniuncusa . The width between the two submarginal lines is larger than in D. uniuncusa , especially in the female. In the male genitalia, D. parva shares a stout uncus with D. uniuncusa and D. regularis , but the terminal half of the socii are quite different: scobinate and semicircular in D. parva , scobinate and tapering in D. uniuncusa , and spinose in D. regularis . The female genitalia are also different: the sclerotized area on the corpus bursae is rounded, less sclerotized and smaller than that in D. uniuncusa , which has a large oval well sclerotized area; the signum is shorter than in D. uniuncusa .

Type material.

Holotype, ♂, China: Yunnan (IZCAS): Tengchong, Houqiao, 1620 m, 6-8.VIII.2016, leg. Ban Xiaoshuang, slide no. Drep-1057, M33049. Paratypes: 1♂, same data as holotype, M33059; 1♀, same data as holotype, slide no. Drep-1059, M33040; 1♂, same locality, 1553 m, 28-29.VI.2014, leg. Pan Xiaodan.

Distribution.

China (Yunnan).

Etymology.

The species is named referring to the Latin word parvus, which refers to the small wings.

Molecular data.

The three specimens of D. parva have no genetic distance between them. The nearest related species is D. concava , with a genetic distance of 9.56%.

Figures

Figures 1 - 27. Adults of Ditrigona 1 D. derocina, male 2 D. diana, male 3 D. crystalla, holotype, male 4 D. spilota, male, ZFMK 5 D. furvicosta, male 6 D. jardanaria, male 7 D. media, paratype, male, ZFMK 8 D. sericea, male 9 D. sericea, male (Auzatella pentesticha Chu & Wang, allotype) 10 D. pentesticha, holotype, female 11 D. q. erminea, holotype, male, ZFMK 12 D. q. spodia, holotype, male, ZFMK 13 D. q. leucophaea, holotype, male, ZFMK 14 D. obliquilinea thibetaria, male 15 D. triangularia, lectotype, male 16 D. uniuncusa, male 17 D. tenuiata, holotype, male 18 D. regularis, male 19, 20 D. sinespina sp. nov., 19 holotype, male 20 paratype, female 21, 22 D. parva sp. nov., 21 holotype, male 22 paratype, female 23 D. concava sp. nov., holotype, male 24 D. titana, holotype, male, ZFMK 25 D. pomenaria male 26 D. polyobotaria, holotype, female, ZFMK 27 D. typhodes, male. Scale bar: 1 cm.

Figures 64 - 74. Male genitalia of Ditrigona 64 D. sinespina sp. nov., holotype 65 D. parva sp. nov., holotype 66 D. concava sp. nov., paratype 67 D. titana, ZFMK 68 D. pomenaria 69 D. typhodes 70 D. lineata lineata 71 D. artema 72 D. candida, paratype, ZFMK 73 D. chionea 74 D. fusca sp. nov., holotype. Scale bars: 1 mm.

Figures 90 - 106. Aedeagus of Ditrigona 90 D. sericea (Auzatella pentesticha Chu & Wang, allotype) 91 D. quinaria erminea, ZFMK 92 D. quinaria spodia 93 D. obliquilinea thibetaria 94 D. triangularia 95 D. uniuncusa 96 D. tenuiata, holotype 97 D. regularis 98 D. sinespina sp. nov., holotype 99 D. parva sp. nov., holotype 100 D. concava sp. nov., paratype 101 D. titana, ZFMK 102 D. pomenaria 103 D. typhodes 104 D. lineata lineata 105 D. artema 106 D. candida, ZFMK. Scale bars: 1 mm.

Figures 128 - 151. Eighth segment of Ditrigona 128 D. uniuncusa 129 D. tenuiata, holotype 130 D. regularis 131 D. sinespina sp. nov., holotype 132 D. parva sp. nov., holotype 133 D. concava, paratype 134 D. titana, ZFMK 135 D. pomenaria 136 D. typhodes 137 D. lineata lineata 138 D. artema 139 D. candida, ZFMK 140 D. chionea 141 D. fusca, sp. nov., holotype 142 D. conflexaria micronioides 143 D. margarita 144 D. berres 145 D. chama 146 D. platytes 147 D. clavata 148 - 151 D. cirruncata 148 from Shaanxi 149 - 150 from Emei Shan, Sichuan 151 from Zhejiang.

Figures 161 - 172. Female genitalia of Ditrigona 161 D. tenuiata, paratype 162 D. regularis 163 D. sinespina sp. nov., paratype 164 D. parva sp. nov., paratype 165 D. typhodes 166 D. lineata lineata 167 D. artema 168 D. candida, paratype, ZFMK 169 D. chionea 170 D. fusca sp. nov., paratype 171 D. conflexaria micronioides 172 D. margarita. Scale bars: 1 mm.