Tentaxus zhangweiweii Han & Kononenko, 2017

Han, H. L. & Kononenko, V. S., 2017, Two replacement names of the genus group of Micronoctuini and a new species of the genus Tentaxus Han & Kononenko from Sabah, East Malaysia (Lepidoptera, Erebidae, Hypenodinae). Taxonomic study of Micronoctuini. Contribution I., Zootaxa 4362 (2), pp. 259-266 : 263-265

Tentaxus zhangweiweii Han & Kononenko , sp. nov.

( Figs 1–3, 5, 7–8 )

Material examined. Holotype. Male , Malaysia, Borneo, Jungle Girl Camp, 20–25.viii.2016 (leg. H.L. Han & H. Geng), gen. prep. No. HHL-3605-1 . Paratypes. 10 males, Malaysia, Borneo , Jungle Girl Camp, 24.iv.–2.v.2016 (leg. H.L. Han) ; 13 males, same data of holotype, gen. prep. No. HHL-3612-1.

Diagnosis. This species is extremely similar to T. musculus Fibiger, 2011 ( Fig. 4 ). It can be separated from the former by following characters: the antemedial line reddish yellow, with distinct black present only at costal margin region, in some specimen indistinct while in T. musculus it is rather broad, with greyish brown outside; postmedial line pale yellow, with black inside at costal margin region (in T. musculus with dark orange inside); subterminal line pale white, with black dots at R5-M1 and A2 inside (in T. musculus —pale yellow, with dark reddish brown inside, without black dot); reniform spot orange (in T. musculus - yellow). In the male genitalia, the sternum of T. zhangweiweii rather longer than those in T. musculus ( Fig. 6 ); juxta-anellus plate equilateral triangle, strongly sclerotized, dorsal without process (in T. musculus - not equilateral triangle, and slightly sclerotized, dorsally with small process); saccus large and long ligulae shaped (in T. musculus - broadly U-shaped); ampullae rather shorter and narrower than T. musculus ; aedeagus with curved and sclerotized carina process, separated from terminal part of dorsal side of aedeagus (in T. musculus with two small, blunt process at end of carina).

Description. Adult ( Figs 1–3 ). Wingspan 10.0– 11.5 mm. Head and thorax yellow, mixed little with white at thorax; abdomen gray to brown, spread yellow scale, yellowish white at terminal part. Forewing yellow; basal line double, with greyish black at costal margin region; antemedial line dark yellow, arched, blurred; median line absent; postmedial line pale yellow, weakly waved, with black line at costal margin inside, other part appears dark yellow to orange; subterminal line pale, from costal margin incurved to R5, then slightly waved, internal oblique to tornus, with black dots at R5-M1 and A2 inside; terminal line black and orange; fringe dark yellow to orange; basal and antemedial lines area yellow; median and postmedial lines area reddish yellow to brownish yellow, spread brown; subterminal line area with dark yellow to reddish yellow band; terminal line area brownish; reniform orange; costal margin rather darker than other part of wing. Hindwing greyish brown; discal spot blurred; terminal line yellow; fringe greyish brown. Male genitalia ( Fig. 5 ). Uncus missing. Tegumen long and narrow evenly, rather broader than T. musculus . Valva lotus-shaped, broader medially; costa narrow, with a stubby basal process; sacculus rather slender and long, basal process very thin; clasper slender, curved to dorsum of valva, with coronal tuft at top; ampullae narrow spoon-shaped, gradually slender from base to apex, blunt at top, longer than valva, dorsal margin smooth and straight, in T. musculus dorsal margin slightly bulge. Vinculum slender, about 1/2 as long as tegumen. Juxta-anellus plate equilateral triangle, strongly sclerotized, with ridge at two basal angles; sternum sclerotized, slender, bore spine shaped, over the top of tegumen. Saccus large and long, ligulate-shaped, weakly sclerotized. Aedeagus smooth incurved from middle to posterior part, with curved sclerotized carina process, separated from terminal part of dorsum of aedeagus; caecum broad, 1/4 as long as aedeagus. Vesica membranous, without cornuti.

Female. unknown.

Etymology. This species name dedicated to Chinese entomologist Mr. Weiwei Zhang.

Distribution. Malaysia, Sabah (Borneo).

Bionomics. ( Figs 7–8 ). The moths have been collected in March, April, May and August in tropical rain forest at altitude 1180–1230m.

Figures

FIGURES 1–8. Tentaxus spp. adults (1–4), male genitalia (5-6), collecting site (7) and map of collecting site (8). 1. T. zhangweiweii sp. nov., male, holotype; 2 & 3. ditto, males, paratypes; 4. T. musculus Fibiger, 2011, male (after Fibiger, 2011); 5. T. zhangweiweii sp. nov., holotype, gen. prep. No. hhl-3605-1; 6. T. musculus Fibiger, 2011 (after Fibiger, 2011); 7. Collecting site of T. zhangweiweii sp. nov. in tropical rain forest; 8. Map of collection site in Jungle Girl Camp (Sabah of Borneo, East Malaysia).