Nephelomilta chalcedona (Černý, 2009) Volynkin & Černý, 2018

Volynkin, Anton V. & Černý, Karel, 2018, Revision of the genus Nephelomilta Hampson, 1900, with descriptions of twelve new species and two new subspecies (Lepidoptera, Erebidae, Arctiinae), Zootaxa 4472 (3), pp. 401-451 : 423

Nephelomilta chalcedona (Černý, 2009) , comb. nov.

( Figs. 78, 79 , 120–122 , 146 )

Cyana chalcedona ČeRNý, 2009, Moths of Thailand 6: 55, pL. 11, fIgS. 111A, 111b (Type LOCALITy: “SW ThAILAND, ChUmphON, PA TOh, BAN LANg TANg, 162 m, 9°46’5”N, 98°46’59”E ”).

Type material examined. Holotype ( Fig. 78 ): ♂, “SW Thailand, Chumphon [prov.], Pa Toh, Ban Lang Tang , 162 m, 9°46’5’’N, 98°46’59’’E, 19, 21.XI.2006, leg. K. Černý ” (Coll. NHMUK).

Paratypes: 2 ♂, 2 ♀, same data as in the holotype, slide AV2553 ♀ Volynkin (Colls. CKC, CAV); 3 ♂♂ same locality and collector, but 7.XII.2005, slide AV2552 ♂ Volynkin (Colls. CKC, CAV); 1 ♀, SW Thailand, Surat Thani [prov.], Khao Sok NP, 300 m, 8.III.2005, leg. K. Černý (Coll. CKC); 2 ♂, SW Thailand, Surat Thani [prov.], Khao Sok NP, 199 m, 8°53’23’’N, 98°30’25’’E, 6.XII.2005, leg. K. Černý, slide AV4140 ♂ Volynkin (Coll. CKC); 1 ♀, W Thailand, Tak [prov.], Doi Mussoe, 821 m, 16°45.317’N, 98°55.438’E, 11.V.2008, leg. K. Černý (Coll. CKC).

Other material examined: THAILAND: 2 ♂, 3 ♀, W Thailand, Tak [prov.], Doi Mussoe, 821 m, 16°45.317’N, 98°55.438’E, 11–12.XI.2010, leg. K. Černý, slides AV2553 ♀, AV4138 ♂, AV4139 ♀, AV4141 ♂ Volynkin ( Coll. CKC) ; 1 ♀, same locality, but 12–20.VIII.2011, leg. Thomas Ihle (Coll. CKC) ; 1 ♂, SW Thailand, Ranong [prov.], 543 m, 10°02’01”N, 98°40’17,66”E, 7.IV.2013, leg. K. Černý (Coll. CKC) ; LAOS: 1 ♂, SE Laos, Khammouane [prov.], Phu Hin Boun , 500 m, 18°10.435’N 104°29.042’E, 24-25.V.2013, leg. T. Ihle, slide AV4143 ♂ Volynkin (Coll. CKC) ; MALAYSIA: 1 ♂, Genting Tea Estate , 610 m, W Pahang , Malaysia, slide BMNH (E) Arct-6548 ♂ Volynkin ( Coll. NHMUK) ; 1 ♀, Malay Penins., Pahang, F.M.S., Fraser’s Hill, 4000 ft., at light, 3.VI. [19]41 / Ex F.M.S. Museum, B.M. 1955–354, slide AV2398 ♀ Volynkin ( Coll. NHMUK) .

Diagnosis. Length of forewing is 8.5–9 mm in males and 10.5–11.5 mm in females. Nephelomilta chalcedona differs externally from N. ferruginea sp. nov. in the reddish-brown area from the antemedial line to the outer wing margin and the absence of a dark dash in the apical white area. The male genitalia of N. chalcedona differ clearly from those of N. ferruginea sp. nov. in the significantly larger apical costal lobe, the presence of the basal dentation of the costa, the nuch larger distal membranous lobe of the valve, and the slightly larger spines on the distal diverticulum of the aedeagus vesica. The male genitalia of N. chalcedona are similar also to N. hortensis sp. nov., but can be distinguished in the broader ventral costal plate, the presence of the basal dentation of the costa, the ampulla lobe-like, with two small dens on its ventral surface (whereas in N. chalcedona the ampulla is trigonal), and the slightly larger thorn on the carinal plate of the aedeagus. The female genitalia of N. chalcedona differ from those of N. ferruginea sp. nov. in the longer and narrower antevaginal plate, the narrower ostium bursae, the slightly narrower ductus bursae, the narrower cluster of spinules in the medial section of the corpus bursae, and the slightly larger signum; from N. hortensis sp. nov. they differ in the significantly longer and broader antevaginal plate, the significantly shorter and narrower ductus bursae with the much smaller right lateral protrusion, and the smaller signum.

Distribution. The species is known from West and South Thailand (Tak, Chumphon and Surat Thani Provinces), South Laos (Khammouane Province) and Malaysia (Malay Peninsula).

Figures

FIGURES 71–83. Nephelomilta Spp.: ADULTS. 71, N. hortensis hortensis, paratype ♀, N Thailand (CKC); 72, N. hortensis fansipana, holotype ♂, N Vietnam (MWM/ZSM); 73, N. h. fansipana, paratype ♂, N Vietnam (MWM/ZSM); 74, N. h. fansipana, paratype ♀, N Vietnam (MWM/ZSM); 75, N. melli, holotype ♂, China, Jiangxi/Fujian border (MWM/ZSM); 76, N. melli, paratype ♂, China, Jiangxi/Fujian border (MWM/ZSM); 77, N. melli, pARAType ♂, ChINA, [ANhUI, QUIANShAN MTS.] (ZMB); 78, N. chalcedona, holotype ♂, SW Thailand (©NHMUK); 79, N. chalcedona, paratype ♀, W Thailand (CKC); 80, N. ferruginea, holotype ♂, Sumatra (©NHMUK); 81, N. ferruginea, paratype ♀, Sumatra (CKC); 82, N. diehli, hOLOType ♂, SUmATRA (MWM/ZSM); 83, N. diehli, pARAType ♂, SUmATRA (CKC).

FIGURES 120–122. Nephelomilta chalcedona: mALe geNITALIA. 120, pARAType, SW ThAILAND, SLIDe AV4140 VOLyNKIN; 121, W ThAILAND, SLIDe AV4141 VOLyNKIN; 122, CeNTRAL LAOS, SLIDe AV4143 VOLyNKIN.

FIGURES 142–147. Nephelomilta Spp.: femALe geNITALIA. 142, N. angkorensis, CAmbODIA, SLIDe MWM 31640 VOLyNKIN; 143, N. pusilla, TAIwAN, SLIDe MWM 31636 VOLyNKIN; 144, N. hortensis hortensis, pARAType, N ThAILAND, SLIDe AV2855 VOLyNKIN; 145, N. hortensis fansipana, pARAType, N VIeTNAm, SLIDe ZSM ARCT. 38/2017 VOLyNKIN; 146, N. chalcedona, W ThAILAND, SLIDe AV4139 VOLyNKIN; 147, N. ferruginea, pARAType, SUmATRA, SLIDe AV2550 VOLyNKIN.