Diduga alternota Bucsek, 2014

Bayarsaikhan, Ulziijargal & Bae, Yang ˗ Seop, 2019, Four new and one newly recorded species of Diduga Moore, [1887] (Lepidoptera, Erebidae, Arctiinae) from Vietnam, with redescription of the little known species Diduga haematomiformis van Eecke, 1920, Zootaxa 4624 (3), pp. 365-376 : 367-368

Diduga alternota Bucsek, 2014

( Figs 3 , 9 , 15 )

Diduga alternota Bucsek, 2014 , Erebidae , Arctiinae ( Lithosiini , Arctiini ) of Malay Peninsula˗ Malaysia. Suppl.: 8, pl. 1: 11, 11a, gen. MalS09. TL: peninsular Malaysia (Pahang dist. Endau Rompin State Park).

Diagnosis. Length of forewing 5 mm in male, 6 mm in female. D. alternota is similar to D. annulata Hampson, 1900 ( Bayarsaikhan et al. 2018: Fig 8 ), both of them with dark fascia in brown forewing, but it can be distinguished by the following characters: forewing more dark brown ground color, with a pale discoidal dot ringed dark line; hindwing brown, with a large dark patch of androconia near tornus in male, which inside of the spot has small light brown stain, but in female, irregular marking consisting of dark brown scales (or diffused this patch in females of Cambodia and peninsular Malaysia specimens, see Bucsek 2014: pl. 1, Fig 11a ; Bayarsaikhan et al 2018: Fig 7b ),

Material examined. Vietnam: 1 ♂, 1 ♀, Prov. Vinh Phuc, Tam Dao N.P., 14.VIII.2005 (Y.S. Bae, J.H. Bae & P.V. Nha leg.), Gen. Slide No. INU˗ 1934V, 1937V ; 3 ♀, Prov. Vinh Phuc, Tam Dao N.P., 14.VIII.2005 (Y.S. Bae, J.H. Bae & P.V. Nha leg.), Gen. Slide No. INU˗ 1930V, 1936V, 1939V ; 1 ♀, Prov. Hanoi, BaVi N.P., 19.VII˗5.VIII.2010 (700 m), (Y.S. Bae & X.V. Le), Gen. Slide No. INU˗ 1938V.

Distribution. Vietnam (Vinh Phuc, Hanoi Prov.), Cambodia, peninsular Malaysia.

Remarks. This species is newly recorded in Vietnam.

Figures

FIGURES 3–7.Adults of genus Diduga spp. from Vietnam. 3a. D. alternota, male (INU˗1934V). 3b ditto, female (INU˗1930V). 4a. D. hanoiensis n. sp., male (holotype, INU˗10012V). 4b. ditto n. sp., female (paratype, INU˗10015V). 5a. D. bayartogtokhi n. sp., male (holotype, INU˗1923V). 5b. ditto n. sp., female (paratype, INU˗10014V). 6a. D. quinquicornuta n. sp., male (holotype, INU˗1918V). 6b. ditto n. sp., female (paratype, INU˗10016V). 7. D. nigridentata n. sp., male (holotype, INU˗1915V).

FIGURES 8–9. Male genitalia of Diduga spp. 8. D. haematomiformis, Preanger, Java (syntype, RMNH.INS.1099029). 9. D. alternota, Vietnam (INU˗1934V).

FIGURES 14–18. Female genitalia of genus Diduga spp. 14. D. haematomiformis, Preanger, Java (syntype, RMNH. INS.1099032). 15. D. alternota, Vietnam (INU˗1937V). 16. D. hanoiensis n. sp., Vietnam (paratype, INU˗10011V). 17. D. bayartogtokhi n. sp., Vietnam (paratype, INU˗10014V). 18. D. quinquicornuta n. sp., Vietnam (paratype, INU˗10008V).

FIGURES 10–11. Male genitalia of genus Diduga spp. from Vietnam. 10. D. hanoiensis n. sp. (holotype, INU˗10012V). 11. D. bayartogtokhi n. sp. (holotype, INU˗1923V).