Research Article |
Corresponding author: Hong-Xiang Han ( hanhx@ioz.ac.cn ) Academic editor: Axel Hausmann
© 2022 Xiao-Jiang Guo, Rui Cheng, Shan Jiang, Da-Yong Xue, Hong-Xiang Han.
This is an open access article distributed under the terms of the Creative Commons Attribution License (CC BY 4.0), which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
Citation:
Guo X-J, Cheng R, Jiang S, Xue D-Y, Han H-X (2022) Four new species of Ditrigona Moore (Lepidoptera, Drepanidae) in China and an annotated catalogue. ZooKeys 1091: 57-98. https://doi.org/10.3897/zookeys.1091.78986
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The Chinese species of the genus Ditrigona Moore, 1888 are reviewed and an annotated catalogue is provided. Four new species are described from China: Ditrigona sinespina Jiang & Han, sp. nov., Ditrigona parva Jiang & Han, sp. nov., Ditrigona concava Guo & Han, sp. nov., and Ditrigona fusca Guo & Han, sp. nov. Deroca crystalla Chu & Wang, 1987 and Auzatella pentesticha Chu & Wang, 1987 are newly combined into, respectively, the derocina and quinaria species groups of Ditrigona. Ditrigona diana Wilkinson is newly recorded in China. This results in 43 species of Ditrigona for the fauna of China. Illustrations of habitus and genitalia of the new species and most known species are presented.
DNA barcoding, Drepaninae, new combination, taxonomy
The genus Ditrigona was originally established by
Further study of the specimens of Ditrigona from IZCAS and MHBU shows that four new species need to be described. The purposes of this paper are to provide a survey and an annotated catalogue of Chinese Ditrigona species, to describe four new species, to newly record Ditrigona diana Wilkinson, 1968 from China, to transfer two species into the genus, and to provide illustrations of external features and genitalia of new species and most known species. This results in 43 species and 8 subspecies of Ditrigona for the fauna of China.
The depositories of all the types and examined specimens are indicated as follows:
MHBU The Museum of Hebei University, Baoding, China;
XTBG Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences, Yunnan, China;
SCAU South China Agricultural University, Guangzhou, China;
Terminology for the genitalia is based on
A total of 16 specimens of the species of the triangularia species group bearing a tail process were used for sequencing the DNA barcoding region of the mitochondrial COI gene. DNA barcodes of 15 specimens were successfully obtained in this work, and one sequence of D. concava was downloaded from BOLD: its related voucher specimen was donated by Prof. Akihior Nakamura from Xishuangbanna Tropical Botanical Garden, Chinese Academy of Sciences (XTBG). Four of these specimens were D. regularis, one of D. triangularia, two D. tenuiata, four D. sinespina sp. nov., three D. parva sp. nov., and two D. concava sp. nov.
Protocols of DNA extraction and sequencing followed
Details of specimens used in molecular analysis of the DNA barcode region.
Sample ID | Species | Date Collected | Locality | Collectors | GenBank/BOLD accession number |
LEP M 33040 | D. parva | 6–8.Aug.2016 | Tengchong, Yunnan | Ban XS | OL664050 |
LEP M 33049 | D. parva | 6–8.Aug.2016 | Tengchong, Yunnan | Ban XS | OL664048 |
LEP M 33059 | D. parva | 6–8.Aug.2016 | Tengchong, Yunnan | Ban XS | OL664049 |
LEP M 33016 | D. regularis | 9–12.Aug.2016 | Yunlong, Yunnan | Ban XS | MK087682 |
LEP M 33027 | D. regularis | 6–8.Aug.2016 | Tengchong, Yunnan | Ban XS | MK087683 |
LEP M 32911 | D. regularis | 10–13.Aug.2017 | Xinping, Yunnan | Cui L | MK087678 |
LEP M 35671 | D. regularis | 14–16.Jul.2018 | Anha, Sichuan | Cui L, Jiang S | MK087688 |
LEP M 32976 | D. triangularia | 13–14.Jul.2014 | Weixi, Yunnan | Pan XD | MK087679 |
LEP M 25081 | D. tenuiata | 11.Sep.2016 | Luding, Sichuan | Li XX | MK087687 |
LEP M 23038 | D. tenuiata | 7–10.Aug.2016 | Kangding, Sichuan | Cui L | MK087685 |
LEP M 33029 | D. sinespina | 9–12.Aug.2016 | Yunlong, Yunnan | Ban XS | MK087684 |
LEP M 33001 | D. sinespina | 9–12.Aug.2016 | Yunlong, Yunnan | Ban XS | MK087680 |
LEP M 33002 | D. sinespina | 9–12.Aug.2016 | Yunlong, Yunnan | Ban XS | MK087681 |
LEP M 33196 | D. sinespina | 26–27.Jun.2014 | Tengchong, Yunnan | Pan XD | MK087677 |
LEP M 32975 | D. concava | 13–14.Jul.2014 | Weixi, Yunnan | Li XX | OL664047 |
ARB00027811 | D. concava | 11.Aug.2011 | Ailao Shan, Yunnan | Kitching RL, Ashton LA | SCDBC000200 |
Ditrigona Moore, 1888: 258. Type species: Urapteryx triangularia Moore, 1867.
Leucodrepana Hampson, 1893: 333. Type species: Leucodrepana idaeoides Hampson, 1892.
Leucodrepanilla Strand, 1911: 198. Type species: Corycia sacra Butler, 1878.
Auzatella Strand, 1917: 148. Type species: Auzata micronioides Strand, 1917.
Thaleridia Moore, 1888: 266. Type species: Thaleridia pruinosa Moore, 1888.
The generic characters of Ditrigona and its differentiation from related genera are detailed in
The species of Ditrigona are mainly distributed in the Oriental region.
Species of the derocina species group are characterized by unipectinate antennae and semi-transparent wings. In the male genitalia, the derocina species group is unusual in Ditrigona in having sclerotization of the vinculum, and a quite long and narrow aedeagus. The eighth sternite is distinguished by large and curved octavals, and the tergite protrudes strongly. The female genitalia are characterized by having a very long ductus bursae, an ostial plate, an accessory sac and a long and narrow signum.
Peridrepana derocina
Bryk, 1943: 6. Holotype ♀, Burma: Kambaiti (
Ditrigona derocina: Wilkinson, 1968: 418.
China: Hubei (
Adults of Ditrigona 1 D. derocina, male 2 D. diana, male 3 D. crystalla, holotype, male 4 D. spilota, male,
China (Hubei, Hunan, Sichuan, Chongqing, Yunnan, Tibet), India, Myanmar.
Ditrigona diana
Wilkinson, 1968: 420. Holotype ♂, India: Gopaldara (
India: 1♂ (
China (Guangxi, Yunnan, Tibet), India.
Deroca crystalla
Chu & Wang, 1987: 116. Holotype ♂, China: Yunnan: Lushui: Yaojiaping (
The species Deroca crystalla Chu & Wang, 1987 was described from Yunnan, Sichuan and Tibet. Its male genitalia obviously belong to the 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.
China: Yunnan (
China (Sichuan, Yunnan, Tibet).
Species of the quinaria species group share bipectinate or serrate antennae with some species of the 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 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 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.
Ditrigona spilota
Wilkinson, 1968: 423. Holotype ♂, China: Yunnan, Likiang (
China: Yunnan: 1♂ (
China (Sichuan, Yunnan).
Compared to the male genitalia of the holotype (fig. 17 in
Teldenia inconspicua
Leech, 1898: 363. Lectotype ♂, China: Sichuan, Ta-Chien-lu (
Peridrepana inconspicua: Warren, 1922: 449.
Ditrigona inconspicua: Wilkinson, 1968: 425.
No.
China (Sichuan).
Leucodrepana furvicosta
Hampson, 1912: 1271. Lectotype ♂, India: Sikkim (
Ditrigona furvicosta: Wilkinson, 1968: 428.
China: Yunnan: 1♀ (
China (Yunnan, Tibet), India.
Corycia jardanaria
Oberthür, 1923: 238. Lectotype ♂, China: Sichuan, Ta-tsien-lu (
Ditrigona jardanaria: Wilkinson, 1968: 429.
China: Henan (
China (Henan, Shaanxi, Sichuan, Tibet).
Ditrigona media
Wilkinson, 1968: 431. Holotype ♂, China: Sichuan, Ta-tsien-Lou (
China: Sichuan (
China (Gansu, Sichuan, Tibet).
Drepana innotata
Hampson, 1893: 335. Lectotype ♀, China: Kulu (Young) (
Peridrepana innotata: Warren, 1922: 449.
Ditrigona innotata: Wilkinson, 1968: 433.
No.
China (Tibet).
Teldenia sericea
Leech, 1898: 263. Lectotype ♂, China: Sichuan, Moupin (
Drepana fulvicosta Dudgeon, 1899: 652. Syntype, India.
Peridrepana fulvicosta: Gaede, 1931: 7.
Leucodrepana nivea brimanica
Bryk, 1943: 7. Holotype ♀ (as ♂): Burma: Kambaiti (
Ditrigona sericea: Wilkinson, 1968: 434.
China: Shaanxi (
China (Shaanxi, Sichuan, Yunnan, Tibet), India, Myanmar.
Auzatella pentesticha
Chu & Wang, 1987: 108. Holotype ♀, China: Tibet: Quxam (
China: Tibet (
China (Tibet).
As stated under the above species, this species now only includes the female holotype. The validity of the species needs further study, for example, by obtaining a DNA barcode from the holotype.
Drepanodes quinaria
Moore, 1867: 618. Neotype ♂, India: Darjiling (
Ditrigona quinaria: Wilkinson, 1968: 438.
At present, D. quinaria comprises five subspecies; four are recorded from China, the exception being D. quinaria nivea (Hampson), which is distributed in India.
No.
China (Tibet), India.
Ditrigona quinaria erminea
Wilkinson, 1968: 442. Holotype ♂, China: Shaanxi, Tapaishan-im-Tsinling (
China: Shaanxi (
China (Shaanxi, Hubei).
Ditrigona quinaria spodia
Wilkinson, 1968: 442. Holotype ♂, China: Yunnan, A-tun-tse (
China: Yunnan: 1♂ (
China (Yunnan).
Ditrigona quinaria leucophaea
Wilkinson, 1968: 443. Holotype ♂, China: Tibet [Sichuan], Batang (
China: Sichuan: 1♂ (
China (Sichuan).
Leucodrepana obliquilinea
Hampson, 1893: 333. Lectotype ♂, India: Assam, Naga Hills (
Ditrigona obliquilinea: Wilkinson, 1968: 444.
Ditrigona obliquilinea includes two subspecies, and the nominate subspecies is distributed in India and Myanmar.
Adults of Ditrigona 28 D. lineata lineata, male 29 D. lineata tephroides, holotype, male,
Micronia thibetaria
Poujade, 1895: 311. Lectotype ♂, China: Thibet [Sichuan], Moupin (
Leucodrepana thibetaria: Leech, 1898: 311.
Corycia pnocaria Oberthür, 1923: 238
Ditrigona obliquilinea thibetaria: Wilkinson, 1968: 445.
China: Hunan (
China (Shaanxi, Zhejiang, Hubei, Hunan, Sichuan, Tibet).
Leucodrepana idaeoides
Hampson, 1893: 333. Lectotype ♂, Sikkim: Tonglo (
Ditrigona idaeoides: Wilkinson, 1968: 447.
No
China (Sichuan), India.
Based on
The species with a tail process on the hind wing have quite distinct wing patterns: the hind wing has the postmedial and submarginal lines approaching each other near the anal angle, and bears a small black patch at the upper angle of the tail. The species lacking a tail process resemble some species of the mytylata species group, in that they have transverse lines which often resemble a narrow band. In the male genitalia, the valva is characterized by having a small flap-like extension. The species with a tail process can also be distinguished by the large rounded socii and the stout aedeagus bearing a brush-like cornutus. In the species lacking a tail process, the aedeagus is narrow, straight or bent, and the cornutus is a simple process or absent. The eighth sternite is small, shallowly concave or protruding in species with a tail process, and the eighth tergite almost unmodified. Both eighth tergite and sternite often possess octavals in the species lacking a tail process. In the female genitalia, the ostium bursae is usually large, and the ductus bursae is often indiscernible, but wide and obvious in D. typhodes. The corpus bursae bears a small accessory sac in species with a tail process. (modified from Wilkinson, 1968)
16 DAN barcoding sequences were obtained for D. regularis, D. triangularia, D. tenuiata, D. concava sp. nov., D. parva sp. nov., and D. sinespina sp. nov., and the six species are clearly separated from each other in the COI barcode fragment (fig. 178). The genetic distance between these species is 8.92% (min. 7.16%, max. 12.32%).
Urapteryx triangularia
Moore, 1867: 612. Lectotype ♂, India: Darjiling (
Ditrigona triangularia: Moore, 1888: 258.
India: 1♂ (
China (Fujian, Taiwan, Yunnan, Sichuan), India, Myanmar.
Ditrigona uniuncusa
Chu & Wang, 1988: 202. Holotype ♂, China: Fujian, Wuyi Shan (
China: Fujian (
Male genitalia of Ditrigona 48 D. derocina 49 D. diana 50 D. crystalla, holotype 51 D. spilota,
China (Fujian, Sichuan).
Ditrigona tenuiata
Jiang & Han, 2019: 84. Holotype, ♂, China: Sichuan, Kangding (
China: Sichuan (
China (Sichuan).
Ditrigona regularis
Warren, 1922: 463. Lectotype ♂, India: Assam, Khasia (
Ditrigona regularis diflerentiata Bryk, 1943: 9.
China: Guangxi (
China (Guangxi, Sichuan, Yunnan, Tibet), India, Myanmar, Thailand.
Head. Antennae bipectinate, with proximal rami shorter than outer rami, the longest ramus about four times diameter of antennal shaft in male; rami quite short in female, almost equal to diameter of antennal shaft. Frons flattened, width less than diameter of compound eyes; white, upper half with a narrow pale brown transverse band. Labial palpus slender, not extending beyond frons, with outside brown, inner side whitish. Vertex white, pale brown anteriorly.
Thorax. Dorsal and ventral sides of thorax white. Tegula white. Hind tibia with two pairs of spurs in both sexes. Forewing length: ♂♀16 mm. Both fore- and hind wings white, transverse lines grey. Forewing with costa pale brown, distal half deeper. Subbasal and antemedial lines slightly bent inwards at middle and costa, the former narrower; postmedial line broad, almost straight; submarginal line double, the inner one slightly wavy and the outer one deeply wavy. Hind wing with antemedial line straight, merging into the elongate grey area along anal margin; postmedial line broader, almost straight, closing to submarginal line near anal angle, forming large pointed teeth on CuA2 and anal fold; submarginal line double, with the inner one nearly straight and only wavy near anal angle, the outer one wavy, the two lines gradually approximating towards anal margin. Anal margin less extended, possessing a quite short tail process, longer in female, with a small black patch. Fringes pale brown. Forewing underside with costa deep brown in basal half.
Abdomen. Dorsal and ventral sides of abdomen white. Eighth tergite large, nearly quadrate, with posterior margin shallowly concave; eighth sternite concave at middle, forming two small lateral blunt processes.
Male genitalia. Uncus bifurcate over its whole length, both halves short and very narrow. Socii large, rounded. Valva small, ventral margin smoothly curved, distal and posterior margins straight, forming a blunt angle; posterior protrusion rounded. Saccus blunt and rounded. Juxta indistinctly shaped. Aedeagus very stout, terminal part narrower; cornutus a large oval spinose patch.
Female genitalia. Papillae analis short; apophyses anteriores moderate, broad basally. Ostium bursae large; ductus bursae indiscernible; corpus bursae round, signum absent.
On the wing pattern, D. sinespina is close to D. tenuiata, but it can be differentiated by the larger distance between the two submarginal lines on the forewing, and the smaller tail process. Compared to D. triangularia and D. uniuncusa, the anal margin of D. sinespina is less extended, and the tail process is distinctly shorter than in those two species. Compared to D. parva sp. nov. and D. concava sp. nov., D. sinespina is larger (with forewing length 16 mm), and the tail process on the hind wing is less developed.
In the male genitalia, the slender uncus is similar to that of D. tenuiata and D. concava, but it is longer than in D. tenuiata and shorter than in D. concava. The straight distal margin of the valva is also different from these two species. The shape of the aedeagus, which is broad and blunt posteriorly, also can be distinguished from these two species. The eighth tergite of the male is similar to that of D. concava, but the eighth sternite is different: in D. sinespina it is narrowly and deeply concave, forming two blunt protrusions, while in D. concava it is widely and shallowly concave, forming two small lateral processes. The female genitalia of D. sinespina are also similar to those of D. tenuiata, but can be differentiated by the lack of a signum.
Holotype, ♂, China: Yunnan (
China (Yunnan).
The species is named from the Latin words sine and spina, which refers to the lack of a signum in the female genitalia.
The mean intraspecific distance of D. sinespina is 1.55% (min. 0%, max. 2.24%, n = 4). The nearest related species is D. tenuiata, with genetic distance 7.16%.
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.
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.
Holotype, ♂, China: Yunnan (
China (Yunnan).
The species is named referring to the Latin word parvus, which refers to the small wings.
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%.
Characters of head and thorax in male same as in D. sinespina. Forewing length 16 mm in male. Fore- and hind wings white, transverse lines grey. Forewing with costa pale brown. Subbasal line slightly bent inwards at middle and costa; antemedial line straight and only bent inwards near costa; postmedial line broad, almost straight; submarginal line double, the inner one slightly wavy and the outer one deeply wavy. Hind wing with antemedial line slightly convex at middle, bent outwards and merging into the elongate grey area along the anal margin; postmedial line broader, almost straight, slanting outwards and closing to meet submarginal line near anal angle, forming large pointed teeth on CuA2 and anal fold; submarginal line double, with the inner one nearly straight and only wavy near anal angle, the outer one wavy, the two lines gradually approximating towards anal margin. Anal margin less extended, with a quite short tail process, longer in the female, with a small black patch. Fringes pale brown. Forewing underside with costa deep brown in basal half.
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,
Male genitalia. Uncus bifurcate over its whole length, both arms slender. Socii large, terminally semicircular, rough apically. Valva small, distal and posterior margin shallowly concave, posterior protrusion rounded. Saccus blunt and rounded. Juxta large, slightly sclerotized, indistinctly shaped. Aedeagus stout, terminal part narrow; cornutus an oblong spinose patch. Eighth tergite quadrate, posterior margin almost straight; eighth sternite shallowly concave, with two small lateral protrusions.
Female genitalia. Unknown.
The most distinctive character of D. concava lies in the male eighth sternite, which is different from all other congeners by the wide and shallow concavity, bearing two small lateral processes. The male genitalia are similar to those of D. tenuiata and D. sinespina, and can be differentiated by the following differences: the uncus is longer than in those two species; the distal and posterior margins of the valva are shallowly concave in D. concava, but the two margins are straight in D. sinespina.
Holotype, ♂, China: Yunnan (
China (Yunnan).
The species is named after the Latin word concavus, which refers to the shallowly concave 8th male sternite.
An intraspecific distance of D. sinespina of 2.07% (n = 2) was recorded. The nearest related species is D. parva, with a genetic distance of 9.56%.
Ditrigona titana
Wilkinson, 1968: 453. Holotype ♂, China: Yunnan, Likiang (
China: Yunnan: 1♂ (
China (Yunnan).
Ditrigona sciara
Wilkinson, 1968: 458. Holotype ♂, China: Sichuan, Ta-tsien-lou (
No.
China (Sichuan).
Corycia (Bapta) pomenaria
Oberthür, 1923: 238. Lectotype ♂, China: Sichuan, Moupin (
Ditrigona pornenaria: Wilkinson, 1968: 454.
China: Sichuan (
China (Sichuan).
Corycia polyobotaria
Oberthür, 1923: 237. Lectotype ♀, China: Sichuan, Siao-lou (
Ditrigona polyobotaria: Wilkinson, 1968: 458.
China: Sichuan (
China (Sichuan).
Ditrigona typhodes
Wilkinson, 1968: 456. Holotype ♂, China: Yunnan, Likiang (
China: Yunnan: 1♂ (
China (Sichuan, Yunnan), Myanmar.
In
(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,
This species group is characterized by usually having lamellate antennae, and the valva of the male genitalia usually possessing a long posterior extension. Other characters are summarized as follows: the forewing is sometimes weakly falcate; the streaks vary considerably, with transverse lines linear, band-like or absent; the uncus is bifurcate, and the socii are very large; the aedeagus is usually arcuate; both eighth sternite and tergite are modified, the former with short octavals, and the latter concave with small or large protrusions; in the female genitalia, the ostial pocket is characteristic, and the corpus bursae lacks an accessory sac. (modified from Wilkinson, 1968)
Leucodrepana lineata
Leech, 1898: 364. Holotype ♂, China: Sichuan, Omei-Shan (
Ditrigona lineata: Wilkinson, 1968: 462. Currently, D. lineata includes two subspecies, and both are distributed in China.
China: Sichuan (
China (Sichuan, Yunnan).
Ditrigona lineata tephroides
Wilkinson, 1968: 464. Holotype ♂, China: Shaanxi, Tapaishan-im-Tsinling (
China: Shaanxi (
China (Shaanxi, Tibet).
Ditrigona legnichrysa
Wilkinson, 1968: 466. Holotype ♂, China: Tibet [Sichuan] (
China: Sichuan (
China (Zhejiang, Sichuan, Yunnan, Tibet).
Corycia (Bapta) policharia
Oberthür, 1923: 237. Lectotype ♀, China: Sichuan, Tsien-Tsuen (
Ditrigona policharia: Wilkinson, 1968: 468.
China: Sichuan (
China (Sichuan).
This species was described based on a single female specimen only.
Ditrigona artema
Wilkinson, 1968: 469. Holotype ♂, China: Sichuan, Siao-lou (
China: Sichuan: 1♂ (
China (Sichuan, Tibet).
Ditrigona candida
Wilkinson, 1968: 472. Holotype ♂, China: Yunnan, Likiang (
China: Yunnan (
China (Yunnan).
Ditrigona chionea
Wilkinson, 1968: 490. Holotype ♂, China: ‘Chasseurs Thibetains’ (
China: Yunnan: 1♂1♀ (
China (Shaanxi, Hubei, Sichuan, Yunnan).
Head. Antennae simple in both male and female. Frons yellow, width less than diameter of compound eyes. Labial palpus with outside deep brown, inner side yellowish. Vertex pale yellow.
Thorax. Tegula pale brown. Dorsal and ventral sides of thorax pale brown. Hind tibia with two pairs of spurs in both sexes. Forewing length: ♂16 mm, ♀15–17 mm. Both wings pale brown, evenly decorated with brown scales, less in basal half of hind wing. Transverse lines absent. Fringes yellowish brown. Underside with forewing deep brown, distal part paler, costa yellowish brown; hind wing with costa yellowish brown, other parts identical to upperside. Fringes yellowish brown.
Abdomen. Dorsal and ventral sides of abdomen pale brown. The eighth tergite with posterior margin concave, with two blunt lateral protrusions; the eighth sternite with posterior margin slightly convex, with two small hooked lateral processes.
Male genitalia. Uncus bifurcate over whole length, the arms narrow and slender. Socii large, tongue-like, of even width, with tips blunt and scobinate. Valva nearly triangular, with tip blunt, ventral margin decorated with tiny spines; basal posterior process bent, tip expanded, with a small accompanying bursa. Juxta rounded, with posterior margin protruding, mound-like. Saccus narrow. Aedeagus slender, almost even in width, tip blunt.
Female genitalia. Ostial pocket band-like. Lamella antevaginalis paired leaf-like. Ductus bursae indiscernible. Corpus bursae rounded; signum a narrow longitudinal sclerotized strip; accessory sac absent.
The wing pattern is distinctive in lacking transverse lines on both fore- and hind wings. The male genitalia are very close to those of D. candida, D. chionea and D. margarita in the mytylata species group, in that they share the slender bifid uncus and tongue-like socii. D. fusca and D. chionea can be differentiated from those two species by the broader valva, on the base of which a sclerotized ridge is present. The difference between D. fusca and D. chionea in the male genitalia lies in the shape of the juxta, which is widely protruding posteriorly in D. fusca, but only with a tiny process at middle in D. chionea. The aedeagus is also different, straight and almost even in width in D. fusca, but tapering and twisted in D. chionea. The female genitalia of D. fusca and D. chionea are almost identical.
Holotype, ♂ (
China (Yunnan).
The specific name is from the Latin word fuscus, which refers to the pale brown wing colour.
Acidalia conflexaria
Walker, 1861: 148. Holotype ♂, N. China (
Ditrigona conflexaria: Wilkinson, 1968: 475. Based on
No.
North China.
Auzata (Auzatella) micronioides
Strand, 1917: 148. Holotype ♀, China: Formosa (
Leucodrepana micronioides: Watson, 1959: 232.
Auzatella micronioides: Inoue, 1962: 12.
Ditrigona conflexaria micronioides: Wilkinson, 1968: 475.
China (
Aedeagus of Ditrigona 90 D. sericea (Auzatella pentesticha Chu & Wang, allotype) 91 D. quinaria erminea,
China (Shanxi, Henan, Shaanxi, Zhejiang, Hubei, Jiangxi, Hunan, Fujian, Taiwan, Guangxi, Sichuan, Chongqing, Guizhou), Japan.
Ditrigona conflexaria cerodeta
Wilkinson, 1968: 477. Holotype ♂, China: Likiang (
China: Yunnan: 1♂ (
(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,
China (Yunnan).
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,
Ditrigona margarita
Wilkinson, 1968: 483. Holotype ♂, China: Shaanxi, Tapaishan-im-Tsinling (
China: Shaanxi: 1♂ (
China (Shanxi, Henan, Shaanxi, Ningxia, Gansu, Sichuan).
Ditrigona berres
Wilkinson, 1968: 486. Holotype ♂, China: Shaanxi, Tapaishan-im-Tsinling (
China: Shaanxi: 1♂ (
China (Shaanxi, Hubei, Hunan).
Ditrigona chama
Wilkinson, 1968: 488. Holotype ♂, China: Sichuan, Siao-lou (
China: Yunnan: 1♂ (
China (Shanxi, Shaanxi, Gansu, Zhejiang, Hubei, Sichuan, Yunnan, Tibet).
Ditrigona platytes
Wilkinson, 1968: 492. Holotype ♂, China: Chekiang, West Tien-mu-Shan (
China: Zhejiang: 1♂ (
China (Shaanxi, Zhejiang, Hubei, Fujian, Sichuan, Yunnan).
Ditrigona clavata Li & Wang, 2015: 567. Holotype ♂, China: Guangxi, Mao’ershan National Nature Reserve (SCAU).
China: Shaanxi (
China (Shaanxi, Gansu, Guangdong, Guangxi).
Ditrigona marmorea
Wilkinson, 1968: 471. Holotype ♂, Assam: Mishmi Hills (
China: Yunnan (
China (Yunnan), India.
Leucodrepana quinquelineata
Leech, 1898: 364. Holotype ♂, Japan (
Auzatella quinquelineata: Inoue, 1962: 13.
Ditrigona quinquelineata: Wilkinson, 1968: 480.
No.
China (Sichuan), Japan.
Ditrigona aphya
Wilkinson, 1968: 485. Holotype ♂, China: Shaanxi, Tapaishan-im-Tsinling (
China: Shaanxi (
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,
China (Shaanxi).
Ditrigona cirruncata
Wilkinson, 1968: 497. Holotype ♂, China: Sichuan, Siao-lou (
China: Sichuan: 1♂ (
China (Shanxi, Henan, Shaanxi, Gansu, Anhui, Zhejiang, Hubei, Jiangxi, Hunan, Guangdong, Guangxi, Sichuan).
There are some variations in the eighth tergite (Figs
We express our sincere thanks to the staff of the Natural History Museum, London, to Dr Dieter Stüning and Dr Marianne Espeland (