Barsine bucseki Volynkin & Černý, 2018

Volynkin, Anton V. & Černý, Karel, 2018, Revision of the Barsine zebrina species-complex, with description of three new species (Lepidoptera, Erebidae, Arctiinae, Lithosiini), Zootaxa 4402 (2), pp. 339-352 : 346-350

Barsine bucseki Volynkin & Černý , sp. nov.

( Figs. 17–20 , 37, 38 , 45 )

Type material. Holotype ( Figs. 17 , 37 ): ♂, SW Thailand, prov . Ranong, Ranong, 380 m, 10°01'32''N 98°40'13'' E, 3–4.XII.2005, leg. K. Černý, slide AV2759 ♂ Volynkin (Coll. MWM/ ZSM, ex coll. CKC).

Paratypes: 3 ♂, 2 ♀, same data as in the holotype, slide AV2762 ♀ Volynkin ( Coll. CKC) ; 2 ♀, SW Thailand, Chumphon, Pa Toh, Ban Lang Tang, 162 m, 9°46'5''N, 98°46'59''E, 19, 21.XI. 2006 leg. K. Černý, slide AV2761 ♀ Volynkin ( Coll. CKC) ; 5 ♂, 7 ♀, same locality, but ex ovo , ♀ coll. 2-3.XII.2007, leg. K. Černý, slides T 194♂ Černý, AV2759 ♂ Volynkin ( Coll. CKC); SW Thailand, Ranong, Ranong , 380 m, 10°01'32''N, 98°40'13''E, 17, 20.XI. 2006 , leg. K. Černý (Coll. CKC); 2 ♀, Malaysia, Pahang distr., Cameron Highlands, Kampung Kuala Boh vill. env., N4°27.9', E 101°34.8'E, 850–1050 m, 26.III.-3.IV.2001 , K. Bucsek leg., slide MWM 3 3644 Volynkin (♀) ( Coll. MWM/ ZSM) ; 5 ♀, Malaysia, Perak, Cameron Highlands North , 7 km south of road 4, 5°33'06.02''N, 101°36'44.42''E, 750-800 m, 25.III.–02.IV.2014 , leg. Karol Bucsek, slide MWM 33662 Volynkin (♀) ( Coll. MWM/ ZSM) .

Diagnosis. Forewing length is 9–10 mm in males and 10–11 mm in females. Externally, the species ( Figs. 17– 20 ) is similar to B. pluma ( Figs. 13–16 ) due to its interrupted medial line, but differs by the slightly smaller size. The main differences are in the genitalia structures: in the male genitalia, B. bucseki sp. nov. ( Figs. 37, 38 ) has broader medial costal process, more robust distal costal process, larger, trigonal basal lobe of sacculus, shorter distal saccular process with tapered tip, much larger basal diverticulum of vesica with stronger granulation, larger subapical diverticulum, and a field of scobination in the largest medial diverticulum, whereas in B. pluma ( Figs. 35, 36 ) the medial costal process is significantly narrower, the distal costal process is much thinner, the trigonal basal lobe of sacculus is narrower, with more smoothly curved dorsal margin, the distal saccular process is significantly longer, slightly curved distally and pointed apically, the basal diverticulum of vesica is smaller, has weaker granulation, the subapical diverticulum is much smaller, and the largest medial diverticulum has a field of small, but robust cornuti; in the female genitalia, B. bucseki sp. nov. ( Fig. 45 ) differs clearly from B. pluma ( Fig. 44 ) by its much narrower, more or less V-like postvaginal plate, V-shaped ostium bursae with sclerotized margins, longer ductus bursae with ribbed sclerotization anteriorly, and much larger appendix bursae, whereas in B. pluma the postvaginal plate is much broader, T-like with lateral lobes curved posteriorly, the ductus bursae is shorter and evenly membranous, and the appendix bursae is much smaller.

Distribution. Malay Peninsula ( Malaysia and South Thailand: Chumphon and Ranong provinces). The species erroneously reported for peninsular Malaysia by Bucsek (2012) as B. pluma .

Etymology. The species name is dedicated to Mr. Karol Bucsek, a famous researcher of the Arctiinae fauna of Malay Peninsula.

Figures

FIGURES 13–20. Barsine spp.: adults. 13, B. pluma, holotype ♀, W Thailand (©NHMUK); 14, B. pluma, paratype ♂, W Thailand (CKC); 15, B. pluma, paratype ♀, W Thailand (CKC); 16, B. pluma, ♂, N Laos (MWM/ZSM); 17, B. bucseki, holotype ♂, SW Thailand (MWM/ZSM); 18, B. bucseki, paratype ♂, SW Thailand (CKC); 19, B. bucseki, paratype ♀, SW Thailand (MWM/ZSM); 20, B.bucseki, paratype ♀, Malaysia (MWM/ZSM).

FIGURES 35–38. Barsine spp.: male genitalia. 35, B. pluma, paratype, W Thailand, slide AV2745; 36, B. pluma, NW Laos, slide MWM 31780 Volynkin; 37, B. bucseki, holotype, SW Thailand, slide AV2759 Volynkin; 38, B. bucseki, paratype, SW Thailand, slide AV2760 Volynkin.

FIGURES 42–47. Barsine spp.: female genitalia. 42, B. zebrina, N Thailand, slide AV2756 Volynkin; 43, B. subzebrina, paratype, Nepal, slide MWM 31694 Volynkin; 44, B. pluma, paratype, W Thailand, slide AV2747 Volynkin; 45, B. bucseki, paratype, SW Thailand, slide AV2761 Volynkin; 46, B. navneetsinghi, paratype, N Myanmar, slide ZSM Arct. 150/2017 Volynkin; 47, B. radians, Nepal, slide MWM 31786 Volynkin.