Sundacossus rinjaniensis Yakovlev & Korzeev, 2022

Yakovlev, Roman V. & Korzeev, Andrei I., 2022, Review of the genus Sundacossus Yakovlev, 2006 (Lepidoptera: Cossidae) with description of one new species from Lombok Island (Indonesia), Ecologica Montenegrina 52, pp. 27-32 : 28

Sundacossus rinjaniensis Yakovlev & Korzeev , sp. nov.

http://zoobank.org/ urn:lsid:zoobank.org:act:17147E45-32DD-4C76-A4F1-4E0D70618CD6

Figs 1 , 4−5

Material. Holotype, male, Indonesia, Lombok Island , Senaru, at light, 08º18′21′′S 116º24′11′′E, 31.viii.2012, leg. A. Korzeev, slide Naydenov # 409 ( ZISP).

Description. Wingspan 47 mm, length of fore wing 22 mm. Antenna unipectinate, setae twice longer than antenna rod diameter. Thorax and abdomen densely covered with dark-brown scales, tegulae and patagia dark-brown, bundles of grey scales at base of abdomen from upside. Fore wing elongated, apically acute, light-grey, ocher-brown portion and tiny black spots basally, wide semicircular grey band postdiscally, crescent grey spot submarginally (at veins R 1−4), postdiscal and submarginal area light-grey with dense grey wavy pattern of thin transverse grey strokes between veins, fringe mottled (dark-grey at veins, white between veins). Hind wing short, grey, fringe mottled (dark-grey at veins, white between veins).

Male genitalia. Uncus robust, short, apically semicircular, strongly sclerotized; gnathos arms short, very thick; gnathos robust, roller-shaped; valve basally wide, gradually narrowing to apex, distal end membranous, with relatively narrow lanceolate apex, costal edge in the zone of transmission of sclerotized part into membranous part – a small semicircular crest with smooth edge; transtilla arms very short, shaped as small sclerotized fold; juxta very robust, strongly sclerotized, saddle-like, with pair of long lanceolate lateral processes directed dorsally, apices acute; saccus very large, semicircular; phallus thick, slightly shorter than valve, almost straight, of equal thickness, apically obliquely cut; vesica aperture in dorso-apical position, about 1/3 of phallus in length, two small cuneal cornuti in vesica.

Female unknown.

Diagnosis. Externally, the new species resembles S. gauguini , in the light-brown portion on the fore wing basally, but differs in the male genital structure:

- the lanceolate apex of the valve (in S. gauguini – the apex of the valve is blunt),

- the common sclerotization of the costal edge of the valve (in S. gauguini – he costal edge of the valve is strongly sclerotized from base to crest on the border of the sclerotized and the membranous part),

- the acute lateral processes of the juxta (in S. gauguini – the lateral processes of the juxta are apically semicircular).

Etymology: This epithet is based on the type locality, Mt. Rinjani.

Figures

Figure 1. Adult males of Sundacossus (all holotypes): A. S. rinjaniensis (ZISP), B. S. gauguini (MWM), C. S. timur (MWM).