Ancistroides armatus armatus (H. Druce, 1873)

Xue, Guoxi, Qu, Peng, Li, Meng, Chiba, Hideyuki & Li, Wenwei, 2022, Molecular and morphological evidences confirm the statuses of Ancistroides othonias (Hewitson, 1878) and the subspecies of A. nigrita (Latreille, [1824]), sensu Evans 1949 (Lepidoptera, Hesperiidae), Zootaxa 5205 (5), pp. 481-490 : 487-488

Ancistroides armatus armatus (H. Druce, 1873)

( Fig. 2 : A95, An8; Fig. 4 : An8; Fig. 7 )

Astictopterus armatus H. Druce,1873: 359 . Type locality: Borneo.

Kerana armata: Elwes & Edwards 1897: 221 .

Ancistroides armatus armatus: Maruyama 1991: 29 ; Eliot 1992: 356; Evans 1949: 281; Kimura 2011: 65; Ek-Amnuay 2012: 840.

The length of forewing is about 26 mm (n = 2) in both sexes. Wing patterns are prominently different to those of the preceding species recognized by clades A to C ( Fig. 1 ): in male, there is a large velvety black patch of specialized scales from vein 1b to the middle of the cell on the ventral side of the forewing, and a similar patch filling the cell on the dorsal side of the hindwing.

Male genitalia ( Fig. 7 ). In lateral view, uncus shorter than tegumen, basal part raised, distal end pointed, lower branch short and triangular; gnathos arm-like, transverse part a little longer than longitudinal part; saccus about 2/5 the length of vinculum. In dorsal view, uncus tapered, distal half bifid and narrowly U-shaped, tip of both branches rounded. In lateral view of valva, dorsal margin flat, distal part bifid into a protrudent shoulder and a sickle shaped branch which bears sawteech on inner edge; harpe triangular, vestigial. Aedeagus remarkably robust, left half of dorsal edge with a wide and deep gap; in lateral view, suprazonal sheath slightly curved downwards, about 3/5 the length of subzonal sheath. Juxta shield-shaped, with a pair of slender and pointed dorsal arms.

Female genitalia ( Fig. 4 : An8). In lateral view, lamella antevaginal nearly oval, strongly developed; antrum very robust. In ventral view, a wide gap between two strong arms of lamella antevaginal, ostium bursae well sclerotized. Lamella postvaginalis trapezoidal, middle of distal edge with a shallow V-shaped notch.

Distribution. S. Myanmar, Peninsular Thailand, W. Malaysia, Sumatra, Batoe, Sipora, Borneo.

Remarks. According to Evans (1949), there is the other subspecies, viz. Ancistroides armatus niasana (Evans, 1926) which is endemic to Nias. The band on the dorsal side of the forewing is obsolete in male, and reduced to separated suffused red spots in female ( Evans 1949: 281).

Figures

FIGURE 1. NJ tree based on Kimura-2-Parameter distances for the partial mitochondrial COI sequences of Ancistroides, values at nodes represent the bootstrap support (BP) values.

FIGURE 2. Adults of Ancistroides species. Codes correspond to the specimen IDs in Table 1 and Figure 1.

FIGURE 4. Female genitalia of Ancistroides species. Codes correspond to the specimen IDs in Table 1 and Figure 1. A. lateral view; B. ventral view; C. lamella postvaginalis, front view.

FIGURE 7. Male genitalia of Ancistroides armatus (A95). A. ring, lateral view; B. tegumen, dorsal view; C. gnathos, ventral view; D. uncus, dorsal view; E. left valva, inner side; F. left valva, dorsal view; G. aedeagus, dorsal view; H. aedeagus, lateral view; I. juxta.