Trismelasmos obiensis Yakovlev, 2023

Yakovlev, Roman V., 2023, New species of genus Trismelasmos Schoorl, 1990 (Lepidoptera, Cossidae, Zeuzerinae) from Obi Island (Indonesia), Ecologica Montenegrina 65, pp. 47-50 : 48-49

Trismelasmos obiensis Yakovlev , sp. n.

https://zoobank.org/ urn:lsid:zoobank.org:act:581F24D4-4ED4-426E-BA27-447986CE2CD9

Figs 1−2

Material. Holotype (male), Indonesia, Obi Isl. , S. Coast, Seribu Mts., 22 km N Tapaya vill., 1200−1500 m, 1°38ʹS, 127°48ʹE, 20.xi−10.xii.2008, leg. Jakl (MWM, Genitalpräparat Heterocera Nr. 27.404).

Description. Male ( Fig. 1 ). Length of fore wing 24 mm. Antenna bipectinate in basal half, serrated in distal half, setae twice longer than antenna stem diameter. Thorax and abdomen densely covered with light-creamy scales, sputtering of brown scales on thorax from upside, brown stripes on thorax lateral sides. Fore wing light-creamy with brown pattern: intense brown stroke along costal margin in basal third, small brown strokes distally along costal margin, slight sputtering of brown scales basally and discally; postdiscal and submarginal portions of wing light-brown with fine wavy strokes between veins (forming thin reticulated pattern on periphery of wing), dense sputtering of brown scales along anal margin, fringe mottled (light between veins, dark at veins). Hind wing light-brown with poorly expressed thin brown pattern of strokes and mesh on wing periphery.

Male genitalia ( Fig. 2 ). Uncus long, with beak-like acute apex; gnathos arms thin, ribbon-like, gnathos reduced; valve simple, costal margin almost smooth, abdominal margin poorly concave, outer margin oblique, apex semicircular; juxta with long ribbon-like lateral processes; saccus small, semicircular; phallus slightly shorter than valve, poorly curved in basal third, with long robust spindle-shaped cornutus in lateral surface of vesica.

Female unknown. Diagnosis. The new species clearly differs from the known species of the genus in the poorly modified pattern on the fore wing (in particular, the completely reduced dark portion on the costal margin of the fore wing postdiscally).

Distribution. Indonesia, North Maluku Province, Obi Island.

Flight period. November – December.

Figures

Figure 1. Trismelasmos obiensis Yakovlev, sp. n., holotype (MWM).

Figure 2. Male genitalia of Trismelasmos obiensis Yakovlev, sp. n., holotype (MWM; Genitalpräparat Heterocera Nr. 27.404).