Oxaenanus yunnana Zhang & Han

Zhang, Xin-Yu & Han, Hui-Lin, 2016, Two new species of the genera Cidariplura Butler, 1879 and Oxaenanus Swinhoe, 1900 from Yunnan, China (Lepidoptera, Erebidae, Herminiinae), Zootaxa 4103 (1), pp. 79-86 : 81-85

Oxaenanus yunnana Zhang & Han sp. nov. ( Figs 4, 5 , 13, 14 )

Types. Holotype: male, China, Yunnan Province, Mengla county, Wangtianshu, 15 i 2013 (colls. H.L. Han, Y. Ding & Y. Chen), slide no. zxy-0077. Paratype: 1 male, same locality, data and collectors as holotype, slide no. zxy-0076.

Diagnosis. This new species is externally very similar to O. brontesalis ( Fig. 6 ), but can be distinguished by somewhat more expressed blackish elements of wing pattern, darker and more arcuate basal line, almost straight shape of postmedial line and rather clear subterminal line, the latter bearing blackish spots along its outer side; and the orbicular and reniform are much paler compared with O. brontesalis . In the male genitalia, the new species clearly differs from O. brontesalis ( Fig. 15 ) by the shape of valva and the shape and arming of the vesica of aedeagus. The uncus has a triangular plate dorsally, which is missing in O. brontesalis ( Fig. 15 ), the valva in O. yunnanna is sclerotized and strong, while unsclerotized in O. brontesalis ; distal part of valva is long finger-like, and apically blunt in O. yunnanna , but it is sharp and slim in O. brontesalis . The aedeagus of the new species is slightly curved and the vesica bears strongly sclerotized cornuti, while in O. brontesalis the aedeagus is straight, the vesica has only small and weak cornuti ( Fig. 16 ).

Description. Adult ( Figs. 4–5 ). Wingspan 34–35 mm (holotype— 35 mm). Head dark yellow. Antenna in male ciliate, each segment with two long bristles. 1st segment of labial palpus strongly directed forward, 2nd segement bent backward, extending over the head, 1st and 2nd segments covered with smooth scales, 3rd segment little expanded, long, with dark yellow scales inside. Forewing broad, dark yellowish-brown, costal margin straight, slightly internal oblique at the end of part; basal line dark, arcuate; antemedial line brown, bent inward at cell, curved; medial line brown, present below cell to dorsum, widening towards dorsum; postmedial line light yellow, marked by brown and black on inner and termen, dorsum with black streak; subterminal line light, slender and yellow with black triangular spots on outside; terminal line also consisting of dark triangular spots; orbicular spot light, present as yellow dot, reniform spot light yellow, with thin black line at center; subterminal and terminal area rather darker than rest of the wing. Hindwing yellowish-brown, gradually darkening towards termen; antemedial, medial and postmedial lines dark, curved, jagged and indistinct; submarginal line light yellow and incurved, with black triangular dots at veins on outside; discal spot blurry.

Male genitalia ( Figs. 13–14 ). Uncus basally bent, with triangular medial extension, distal part swollen, apically hooked. Tegumen broad, almost equal in length to the V-shaped vinculum. Valva with large, elongate, well-formed sacculus and strongly developed costa; little costal medial process bearing hairs; distal portion of valva strongly sclerotized, cylindrical; sacculus slightly sclerotized, elongated. Juxta leaf-like, with rib at center. Saccus Y-shaped. Aedeagus cylindrical, bent, carina weakly sclerotized. Vesica membranous, subbasal diverticulum broad, capsuleshaped, with thin burs at apex, a ring of small cornuti at middle part, diffused grains at basal half; main diverticulum with 4–5 strongly sclerotized and big cornuti at the dorsal part of middle section; a plate of cornuti at the ventral part of that section; and with a plate of sclerotized grains at terminal section.

Female. Unknown.

Distribution. ( Fig. 19 B) China (Yunnan: Wangtianshu).

Etymology. The species is named after the type-locality in the Yunnan Province of China.

Bionomics. Moths fly in January. The species was collected in tropical rain forest, with broad-leaved trees, lianas and bamboo bushes ( Fig. 18 ).

Figures

FIGURES 1 – 6. (The scale is 1 cm) Cidariplura and Oxaenanus spp., adults. 1. Cidariplura chenyxi sp. nov., male, holotype; 2. C. chenyxi sp. nov., female, paratype; 3. C. butleri, female; 4. Oxaenanus yunnana sp. nov., male, holotype; 5. O. yunnana sp. nov., male, paratype; 6. O. brontesalis, male, after Holloway (2008).

FIGURES 13 – 16. Oxaenanus spp., genitalia. 13 – 14. O. yunnana sp. nov., male, holotype genit. prep. zxy- 0077 (holotype) (13 — armature; 14 — aedeagus); 15 – 16. O. brontesalis (Walker, 1859), male, after Holloway (2008).

FIGURES 17 – 19. 17. Collecting site of Cidariplura chenyxi sp. nov. near Lincang (Prov. Yunnan): mixed broad-leaved and subtropical forest with patches of grassland and bushes of bamboo. 18. Collecting site of Oxaenanus yunnana sp. nov. near Puer (Prov. Yunnan): tropical rainforest with lianas. 19. Collecting map: A— Cidariplura chenyxi sp. nov.; B— Oxaenanus yunnana sp. nov.