Bucsekatha, Volynkin & Černý, 2025

Volynkin, Anton V. & Černý, Karel, 2025, On the taxonomy of the Brunia Moore generic complex with the description of a new genus, a new subgenus and four new species (Lepidoptera: Erebidae: Arctiinae: Lithosiini: Lithosiina), Ecologica Montenegrina 87, pp. 46-76 : 51-52

Genus Bucsekatha gen. n.

https://zoobank.org/ urn:lsid:zoobank.org:act:60F250C1-9139-423D-8632-4E258E1C0B54

Type species: Bucsekatha sunda sp. n., by present designation.

Diagnosis. Species of the new genus ( Figs 22–35 ) are externally very similar to Brunia (Brunikatha) subgen. n. ( Figs 5–21 ) and Sany ( Figs 36–38 ), and identification requires the examination of the genitalia structures. In the male genitalia, Bucsekatha gen. n. ( Figs 66–78 ) is morphologically similar to Sany ( Figs 79, 80 ) sharing the combination of the following features. (1) The scaphium area is setose. (2) The subscaphium area is membranous. (3) The ventral wall of the anellus bears a caulis subdivided into two lobes. (4) The phallus is cylindrical with a ductus ejaculatorius originating laterally on the left side (vs. Brunia and a number of other Lithosiini having a ductus ejaculatorius originating dorsally). (5) The dorsal carina bears a thorn-shaped subapical process directed dorsad. (6) The vesica has a short main chamber, which bears a short but basally broad medial cornutus and has one to three short diverticula proximally and medially, and an elongate, more or less tubular distal diverticulum bearing a cornutus apically or subapically. However, the male genitalia of Bucsekatha gen. n. differ from Sany in the lobes of the caulis being completely fused with anellus and separated from each other (whereas they are ventrally fused with each other and dorsally extended into loose processes in Sany ), the broader lobular valva with a convex ventral margin (it is very narrow with almost parallel margins in Sany ), the distal section of the editum expanded into a broad setose soft lobe (autapomorphic feature), the reduced, tubercle-like lamella centralis (absent in Sany ), the weakly setose apex of the valva (it is covered with robust spine-like setae in Sany ), and the broader sacculus with a well-developed distal process (the latter is reduced or completely absent in Sany ). The female genitalia ground plan of Bucsekatha gen. n. ( Figs 98–105 ) is very similar to Sany ( Fig. 106 ) but the latter has an appendix bursae situated rather laterally whereas it is situated ventrally or ventro-laterally in Bucsekatha gen. n.

Etymology. The genus name is an aggregate of the surname Bucsek and the genus-group name Katha . The new genus is named after Karol Bucsek, renowned expert in the Asian Arctiinae , who greatly contributed to the knowledge of the Lithosiini of the Malay Peninsula, Philippine Archipelago and Laos including the taxonomy of the Brunia generic complex.

Figures

Figures 19–35. Adults of Brunia (19–21) and Bucsekatha gen. n. (22–35) spp. Depositories of the specimens: 19– 21, 25, 27, 31 and 32 in CKC; 22–24, 26, 28–30 and 33 in MWM/ZSM (24 and 30: ex CKC); 34 and 35 in CAV.

Figures 1–18. Adults of Brunia spp. Depositories of the specimens: 1, 2 and 10–16 in MWM/ZSM; 3 and 4 in ANHRT; 5–8 and 17, 18 in CKC; 9 in HUFA (photo by V. Zolotuhin, courtesy of V. Dubatolov).

Figures 36–53. Adults of Sany (36–38), Dubatoloviana (39–52) and Brunia (53) spp. Depositories of the specimens: 36, 37, 39, 41–45, 47, 52 and 53 in MWM/ZSM (45: ex CKC); 38 and 50 in NHMUK; 40, 46, 48, 49 and 51 in CKC.

Figures 66–69. Male genitalia of Bucsekatha gen. n. spp. Depositories of the specimens dissected: 66–68 in MWM/ZSM (67: ex CKC); 69 in CKC.

Figures 70–73. Male genitalia of Bucsekatha gen. n. spp. Depositories of the specimens dissected: 70, 71 and 73 in MWM/ZSM (73: ex CKC); 72 in CKC.

Figures 74–77. Male genitalia of Bucsekatha gen. n. spp. Depositories of the specimens dissected: 74 and 75 in CKC; 76 in MWM/ZSM; 77 in CAV.

Figures 78–81. Male genitalia of Bucsekatha gen. n. (78), Sany (79, 80) and Dubatoloviana (81) spp. Depositories of the specimens dissected: 78, 79 and 81 in MWM/ZSM; 90 in NHMUK.

Figures 95–100. Female genitalia of Brunia (95–97) and Bucsekatha gen. n. (98–100) spp. Depositories of the specimens dissected: 95, 97, 99 and 100 in CKC; 96 and 98 in MWM/ZSM.

Figures 101–106. Female genitalia of Bucsekatha gen. n. (101–105) and Sany (106) spp. Depositories of the specimens dissected: 101, 102 and 106 in MWM/ZSM; 103 in CKC; 104 and 105 in CAV.