Exoasota pursatensis Ko & Bae, 2020

Ko, Jae-Ho, Bayarsaikhan, Ulziijargal, Park, Bo-Sun, Lee, Tak-Gi, Cha, Yeong-Bin, Jang, Chang-Moon, Lee, Jong Koo & Bae, Yang-Seop, 2020, Exoasota pursatensis Ko & Bae, new genus and species of the Spilomelinae (Lepidoptera: Pyraloidea: Crambidae) from Indochina, Zootaxa 4838 (1), pp. 119-127 : 121-126

Exoasota pursatensis Ko & Bae , sp. nov.

( Figs. 1 , 4, 5, 6, 7, 10 , 12 )

Type materials. Holotype: ♂, CAMBODIA: Samkos , Pursat Prov., 08 II 2015 (Bae Y.S., Ju Y.D., Park B.S., Na S.M., Kim J.W., Lee D.J.), (12°12´38.3"N 102°53´54.3"E), genitalia slide no. INU−6575 . Paratypes. (10 ♂, 12 ♀), CAMBODIA : 1 ♂, 1 ♀, Samkos , Pursat Prov., 17 II 2012 (Bae Y.S., Ju Y.D., Park B.S.), (12°12´41"N 102°54´37"E) , genitalia slide no. INU−3672; 1 ♀, Samkos , Pursat Prov., 18 II 2012 (Bae Y.S., Ju Y.D., Park B.S.), (12°12´39"N 102°55´8"E) , genitalia slide no. INU−6576; 1 ♀, Samkos , Pursat Prov., 19 II 2012 (Bae Y.S., Ju Y.D., Park B.S.), (12°13´06"N 102°55´8"E) ; 1 ♂, 1 ♀, Bokor , Kampot Prov., 13 VII 2012 (Bae Y.S., Ju Y.D., Le X. V., Park B.S., Lee H.J.), (10°36´52"N 104°05´44"E) , genitalia slide no. INU−6513; 3 ♀, Samkos , Pursat Prov., 19 VII 2012 (Bae Y.S., Ju Y.D., Le X. V., Park B.S., Lee H.J.), (12°12´41"N 102°54´38"E) ; 2 ♂, 2 ♀, Samkos , Pursat Prov., 20 VII 2012 (Bae Y.S., Ju Y.D., Le X. V., Park B.S., Lee H.J.), (12°12´40.43"N 102°53´42.38"E) , genitalia slide no. INU−3671; 1 ♂, Samkos , Pursat Prov., 21 VII 2012 (Bae Y.S., Ju Y.D., Le X. V., Park B.S., Lee H.J.), (12°12´42.35"N 102°53´40.69"E) ; 2 ♂, Kulen , Siem Reap Prov., 15 II 2013 (Bae Y.S., Ju Y.D., Park B.S., Lee H.J.), (13°36´43"N 104°06´55"E) ; 1 ♂, Samkos , Pursat Prov., 16 II 2013 (Bae Y.S., Ju Y.D., Park B.S., Lee H.J.), (12°12´45.6"N 102°53´19.2"E Alt.: 839 m), genitalia slide no. INU−3542 ; 1 ♀, Samkos , Pursat Prov., 18 II 2013 (Bae Y.S., Ju Y.D., Park B.S., Lee H.J.), (12°12´48.2"N 102°53´29.2"E Alt.: 841 m), genitalia slide no. INU−3541 ; 1 ♀, Samkos , Pursat Prov., 07 II 2015 (Bae Y.S., Ju Y.D., Park B.S., Na S.M., Kim J.W., Lee D.J.), (12°12´12.6"N 102°52´10.8"E) . THAILAND: 1 ♂, Nakhon Nayok Khao Yai, Alt. : 800 m, 24 IX 1987 (Moriuti, Saito, Arita, Yoshiyasu), Sample no. OPU−110, genitalia slide no. INU−6555 . VIETNAM: 1 ♂, Cuc Phuong National Park , 450 mm, 14 VI 2004 (K. T. Park & N. Cuong), Sample no. KNAE 129305 , genitalia slide no. INU−6556 . MYANMAR: 1 ♀, Shang Kaung , Kachin State, 23 IV 2019 (Ko J.H., Lee T.G., Jeon M.J., Kim Y.H., Jung S.W., Lee J.S.), (27°25´29.46"N 97°17´1.181"E Alt.: 461 m), genitalia slide no. INU−6554 .

Diagnosis. The hindwing pattern of Exoasota pursatensis sp. nov. resembles Anania hortulata ( Linnaeus, 1758) and Anania sinensis Yang & Landry, 2019 (p.17, adult figs. 6A, 6B, 6C, 6D) ( Crambidae : Pyraustinae ), but it can be distinguished from them by the yellow basal area and brown dorsum of the forewing; in male genitalia, uncus slender; valva ovoid and strongly sclerotized at costal margin; fibula curved downward; in female genitalia, corpus bursae oviform and signum absent; appendix bursae absent. Moreover, the appearance of Exoasota pursatensis sp. nov. is similar to Epiparbattia gloriosalis Caradja, 1925 ( Fig. 10 ) ( Crambidae : Pyraustinae ), but it can be distinguished from latter by the following characters: patagium and tegula with two black orbicular spots; discal cell with two brown patches and brown dorsum of forewing; discal cell of hindwing with a brown orbicular spot; brown subterminal fascia of hindwing; in male genitalia, uncus sharpened; saccus V-shaped; aedeagus with two cornuti; in female genitalia, antrum oblong, strongly sclerotized; corpus bursae oviform and signum absent; appendix bursae absent.

Also, this species resembles Asota tortuosa ( Moore, 1872) ( Figs. 8, 9 ) ( Erebidae : Aganainae ) in the yellow basal area and brown terminal to postmedial area of the forewing; brown series of adterminal patches of the hindwing, but it can be distinguished from Asota tortuosa by basal area with two black spots and discal cell with two brown patches of the forewing; discal cell with a brown patch and series of subterminal brown patches of the hindwing.

Description. Adult ( Figs. 1 , 4, 5, 6, 7 ). Length of forewing 28–30 mm in both sexes. Head covered with yellow scales; vertex with a black patch; antennae filiform; ocellus well-developed; chaetosemata absent; labial palpus upturned, brown, mixed with yellow scales; maxillary palpus short, covered with yellow scales; proboscis well-developed, brown, mixed with yellow scales. Patagium and tegula vivid yellow, each with one black orbicular patches. Ground color of forewing white; costal margin brown; basal area yellow, with two black orbicular spots; subbasal line brown, outwardly oblique from basal 1/6 of costa to basal 1/3 of dorsum; discal cell with two brown orbicular spots; submedian line brown, inwardly oblique from CuA 1 to distal 1/3 of dorsum; terminal area brown; dorsum brown; fringe brown. Ground color of hindwing white; discal cell with a brown orbicular spot; postmedial band brown, furrow-shaped; series of adterminal patches or line brown. Abdomen yellow, with symmetrical black, dorsal orbicular spots. Male genitalia ( Fig. 11 ). Uncus slender, curved at distal 1/4, pointed and setose at apex; valva ovoid, costa strongly sclerotized; sacculus band-shaped, about half length of valva; fibula spine-shaped; juxta tube-shaped; vinculum V-shaped, slightly shorter than juxta; aedeagus cylindrical, almost same length as valva, cornuti hookshaped, about 1/3 length of aedeagus. Female genitalia ( Fig. 13 ). Papilla anales ovate; posterior apophyses almost same length as anterior apophyses; antrum tube-shaped, strongly sclerotized, same length as ductus bursae; ductus bursae membranous, about half length of corpus bursae; corpus bursae oval, membranous, without signum.

Distribution. Cambodia, Myanmar, Thailand, Vietnam.

Host plants. Unknown.

Etymology. The name is derived from the type locality, Purasat Province, Cambodia.

Remarks. According to the surveyed specimen, the individuals of Exoasota pursatensis sp. nov. present variations in the wing pattern ( Figs. 4–7 ).

Figures

FIGURES 1−2. 1. Lateral view of head of Exoasota pursatensis sp. nov. 2. Tympanal organs of Exoasota pursatensis sp. nov.

FIGURES 4−10. Adults of new and compared species from Indochina. 4. Exoasota pursatensis sp. nov., male (holotype, INU−6575 Cambodia). 5. ditto, female (paratype, INU−6576 Cambodia). 6. ditto, male (paratype, INU−6556 Vietnam). 7. ditto, female (paratype, INU−6554 Myanmar). 8. Asota tortousa, male, Myanmar. 9. ditto, female, Myanmar. 10. Epiparbattia gloriosalis, male, Myanmar.

FIGURES 11−13. Genitalia and tympanal organ of Exoasota pursatensis sp. nov. 11. Male genitalia (holotype, INU−6575 Cambodia). 12. Tympanal organ (paratype, INU−6513 Cambodia). 13. Female genitalia (paratype, INU−6576 Cambodia).