Autosticha rhombea S. Wang, 2021

Tao, Zhulin, Wang, Yuqi & Wang, Shuxia, 2021, Taxonomy of the genus Autosticha Meyrick (Lepidoptera: Autostichidae) in China Descriptions of fifteen new species, Zootaxa 5048 (3), pp. 347-370 : 352-353

Autosticha rhombea S. Wang , sp. nov.

( Figs 4 , 18 )

urn:lsid:zoobank.org:act:82DB4949-D64B-4B47-BBEA-6347956C6FF2

Type material. CHINA, Yunnan: Holotype ♂, Botanical Garden (21.6ºN, 101.59ºE), 1000 m, 7.VIII.2005, leg. YD Ren, slide No. WYQ13123 . Paratypes: 1♂, 5.VIII.2005, other same data as holotype, slide No. WYQ16458 ; 1♂, Bubang, Mengla , 650 m, 23.VIII.2005, leg. YD Ren, slide No. WYQ13127 ; 2♂, Xishuangbanna, Bubang , 656 m, 23−24.VII.2014, leg. KJ Teng et al., slide Nos. WYQ14120, WYQ14123 .

Diagnosis. The new species is similar to A. hainanica Park et Wu, 2003 in the shape of the valva in male genitalia. It can be distinguished by the sacculus without a process, the rhombic juxta, and the aedeagus with a stout spine-shaped process near its apex. In A. hainanica , the sacculus has a process on the dorsal margin, the juxta is semielliptical, and the aedeagus lacks a process.

Description. Adult ( Fig. 4 ). Forewing length 5.7−6.5 mm.

Head yellow mixed with dark brown scales. Antenna: scape dark brown; flagellum yellow, annulated with dark brown on dorsal surface. Labial palpus with second palpomere pale yellow on inner surface except dark brown at apex, outer surface greyish brown; third palpomere yellow.

Thorax and tegula dark brown, mixed with yellow scales. Forewing ground color yellow, with brown scales throughout, with dense black scales at apex; costal margin dark brown along basal half, with three evenly spaced dark brown dots in distal 1/3; black spot placed near base of subcostal margin, at base of fold and near base of dorsum respectively; discal, discocellular and plical spots black, discocellular spot largest; fringe yellow, tinged with dark brown. Hindwing and fringe brown, fringe with a pale yellow basal line. Fore- and midlegs with femora greyish white on ventral surface, deep grey on dorsal surface, tibiae and tarsi dark brown on dorsal surface, yellow on ventral surface; hindleg yellow, tibia with dense dark brown scales on outer surface, pale yellow at apex of each tarsomere.

Male genitalia ( Fig. 18 ). Uncus broadly spatulate, basal half parallel-sided laterally, distal half dilated, rounded at apex. Gnathos with mesial plate distinctly extended, pointed at apex; lateral arms narrowly banded, about three times length of mesial plate. Tegumen with posterior 1/3 trapezoidal, shallowly concave at middle on anterior margin; lateral arm narrowly banded. Valva narrow at base, slightly widened to about middle, greatly shrunk beyond basal 2/5 from ventral margin, forming a large trapezoidal concavity, distal 1/4 dilated, asymmetrical: left side subrectangular, straight on ventral margin, right side wider, triangularly produced ventrally; costal margin with basal half strongly sclerotized, irregularly banded; sacculus widened to basal 3/5 of valva, right-angled ventroapically, straight apically, setose distally. Saccus shorter than uncus, narrowed to middle, distal half digitate. Juxta rhombical. Aedeagus about 2/3 length of valva, with a spine-shaped process at preapex ( Fig. 18b ); cornuti consisting of some clustered spines ( Fig. 18a ).

Female unknown.

Distribution. China (Yunnan).

Etymology. The specific epithet of the new species is derived from the Latin rhombeus, referring to the shape of the juxta in the male genitalia.

Figures

FIGURES 3–8. Adults of Autosticha spp. 3, A. flabellata sp. nov.; 4, A. rhombea sp. nov.; 5, A. auriculata sp. nov.; 6, A. apicilata sp. nov.; 7, A. bomiensis sp. nov.; 8, A. longispina sp. nov. All holotypes and males. Scales = 2.0 mm.

FIGURES 17–22. Male genitalia of Autosticha spp. 17, A. flabellata sp. nov., slide No. TZL20724; 18, A. rhombea sp. nov., slide No. WYQ13123, 18a, enlarged aedeagus, slide No. WYQ16458; 19, A. auriculata sp. nov., slide No. WYQ14121, 19a, enlarged aedeagus; 20, A. apicilata sp. nov., slide No. WYQ16221; 21, A. bomiensis sp. nov., slide No. WYQ16570; 22, A. longispina sp. nov., slide No. WYQ15035; 17a, 20a, 21a, 22a, enlarged cornuti. All holotypes except 18a. Scales: 17–22, 18a = 0.2 mm; 17a–22a = 0.1 mm.