Ditrigona crystalla (Chu & Wang, 1987) Guo & Cheng & Jiang & Xue & 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

3. Ditrigona crystalla (Chu & Wang, 1987) comb. nov.

Figs 3 , 50 , 84 , 118 , 154

Deroca crystalla Chu & Wang, 1987: 116. Holotype ♂, China: Yunnan: Lushui: Yaojiaping (IZCAS).

Note.

The species Deroca crystalla Chu & Wang, 1987 was described from Yunnan, Sichuan and Tibet. Its male genitalia obviously belong to the Ditrigona derocina species group of Ditrigona , and we therefore transfer the species to Ditrigona . The male genitalia are almost identical to those of D. derocina . However, the corpus bursae of the female genitalia is scobinate, which is different from the smooth ones of D. derocina and D. diana , though they share a very long and narrow ductus bursae and a slender curved signum. The ostial plate is invisible in D. crystalla , and it is most probably present, though it seems that the sternite was incorrectly removed and the abdomen is not preserved on the slide.

Material examined.

China: Yunnan (IZCAS): 1♂, holotype of Deroca crystalla , Lushui, Yaojiaping , 2500 m, 4.VI.1981, leg. Liao Subai ; 1♂, Tengchong, Dahaoping , 2020 m, 24-26.V.1992, leg. Xue Dayong ; 1♂, same locality, 5-7.VIII.2007, leg. Wu Chunguang, Xue Dayong. Sichuan (IZCAS): 1♀, allotype of Deroca crystalla , Guan Xian, Qingcheng Shan , 700-1600 m, 4.VI.1979, leg. Shang Jinwen. Tibet (IZCAS): 1♂, paratype of Deroca crystalla , Zham , 2400 m, 4.VII.1975, leg. Wang Ziqing.

Distribution.

China (Sichuan, Yunnan, Tibet).

Ditrigona quinaria species group

Wilkinson (1968) recorded 11 species in the Ditrigona quinaria species group: Ditrigona spilota Wilkinson, Ditrigona inconspicua (Leech), Ditrigona furvicosta (Hampson), Ditrigona jardanaria ( Oberthür), Ditrigona media Wilkinson, Ditrigona innotata (Hampson), Ditrigona sericea (Leech), Ditrigona quinaria (Moore), Ditrigona obliquilinea (Hampson), Ditrigona idaeoides (Hampson), and Ditrigona spatulata Wilkinson. The former 10 species are recorded in China, and Auzatella pentesticha Chu & Wang is newly combined to Ditrigona in this work.

Species of the Ditrigona quinaria species group share bipectinate or serrate antennae with some species of the Ditrigona triangularia and mytylata species groups. In the male genitalia, the uncus is usually single, but sometimes bifurcate or notched. The single uncus resembles that of species of the Ditrigona derocina species group, but the group can be differentiated by the lack of sclerotization on the vinculum, and the large and broad saccus. The small and setose valva lacking a posterior projection also differs from those in the Ditrigona triangularia and mytylata species groups. The aedeagus is often characterized by the presence of a minute to large apical projection (not present in D. spilota and D. obliquilinea , and the situation unknown in D. innotata and D. idaeoides ). The eighth sternite is modified with short octavals, and the tergite is often shallowly to moderately concave, occasionally straight or protruding with tiny lateral projections. The female genitalia lack an ostial plate; the ductus bursae is short and broad, and the corpus bursae usually has an accessory sac and a long and thin signum.

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 48 - 63. Male genitalia of Ditrigona 48 D. derocina 49 D. diana 50 D. crystalla, holotype 51 D. spilota, ZFMK 52 D. furvicosta 53 D. jardanaria 54 D. media 55 D. sericea 56 D. sericea (Auzatella pentesticha Chu & Wang, allotype) 57 D. quinaria erminea, ZFMK 58 D. quinaria spodia 59 D. obliquilinea thibetaria 60 D. triangularia 61 D. uniuncusa 62 D. tenuiata, holotype 63 D. regularis. Scale bars: 1 mm.

Figures 75 - 89. (75 - 81) Male genitalia of Ditrigona 75 D. conflexaria micronioides 76 D. margarita 77 D. berres 78 D. chama 79 D. platytes 80 D. clavata 81 D. cirruncata. (82 - 89) Aedeagus of Ditrigona 82 D. derocina 83 D. diana 84 D. crystalla, holotype 85 D. spilota, ZFMK 86 D. furvicosta 87 D. jardanaria 88 D. media 89 D. sericea. Scale bars: 1 mm.

Figures 107 - 127. (107 - 115) Aedeagus of Ditrigona 107 D. chionea 108 D. fusca sp. nov., holotype 109 D. conflexaria micronioides 110 D. margarita 111 D. berres 112 D. chama 113 D. platytes 114 D. clavata 115 D. cirruncata. Scale bars: 1 mm. (116 - 127) Eighth segment of Ditrigona 116 D. derocina 117 D. diana 118 D. crystalla, holotype 119 D. spilota, ZFMK 120 D. furvicosta 121 D. jardanaria 122 D. media 123 D. sericea 124 D. quinaria erminea, ZFMK 125 D. quinaria spodia 126 D. obliquilinea thibetaria 127 D. triangularia

Figures 152 - 160. Female genitalia of Ditrigona 152 D. derocina 153 D. diana 154 D. crystalla, allotype 155 D. spilota, ZFMK 156 D. furvicosta 157 D. sericea 158 D. quinaria erminea, ZFMK 159 D. obliquilinea thibetaria 160 D. uniuncusa. Scale bars: 1 mm.