Aulidiotis biloba

Liu, Linjie & Li, Houhun, 2016, Review of the genus Aulidiotis Meyrick, 1925 (Lepidoptera: Gelechiidae), Zootaxa 4061 (1), pp. 41-50 : 49-50

Aulidiotis biloba Li, sp. nov.

( Figs 9 , 15 )

Type material. Holotype. ♂, China: Mt. Jianfeng, Ledong (18.74°N, 118.87°E), Hainan, 510 m, 6.IV.2002, leg. Peixin Cong, Linjie Liu and Sha Hu, genitalia slide No. LLJ15020.

Paratypes: 1♂, Mt. Limu (19.10°N, 109.11°E), Hainan, 607 m, 25.VII.2014, leg. Peixin Cong, Linjie Liu and Sha Hu, genitalia slide No. LLJ15104; 1♂, Mt. Wuzhi (18.53°N, 109.39°E), Hainan, 742 m, 21.V.2015, leg. Peixin Cong, Wei Guan and Sha Hu.

Adult ( Fig. 9 ). Wingspan 13.0 mm. Head milky white, with chaetosema on lateral sides. Labial palpus yellowish white, with brown scales, except second segment pale brown on outer side; second segment longer than diameter of eye, slightly thicker than third; third segment with distal 1/4 slightly narrowed, apex acute. Antenna with scape yellowish white, flagellum pale brown, with deep yellow rings. Thorax and tegula yellowish white. Forewing grayish yellow mixed with pale brown scales, grayish brown between outer margin of cell and inner margin of distal patch, costal margin pale brown; dark brown spot beyond middle of cell; distal patch subelliptical, pale orange with scattered pale brown scales, inner margin almost straight; cilia yellowish white with brown. Hindwing pale brown, with cilia grayish brown. Legs yellowish white, mixed with brown scales; fore and mid legs with tarsomeres pale brown apically; hindleg with tarsus yellowish white at apex of each segment, except last segment pale brown apically.

Male genitalia ( Fig. 15 ). Uncus with sparse long setae, broad at base, narrowed gradually to basal 1/3, broadened obviously from basal 1/3 to 2/3; distal 1/3 nearly trapezoid, with length slightly shorter than basal width; posterior margin concave, bilobed. Gnathos narrow basally, widened toward distal portion, approximately fanshaped; anterior margin somewhat arched, with dense pecten stretching backward. Valva shorter than tegumenuncus complex, almost uniform in width, rounded apically. Transtilla dilated distally, weakly linked medially. Sacculus subrectangular, apex slightly concave anteriorly, produced to an elongate, apex pointed and curved triangular process dorsoapically, with sparse setae. Vinculum narrowly banded. Phallus broad at base, distal half relatively narrow, apex bluntly rounded.

Female unknown.

Diagnosis. Aulidiotis biloba sp. nov. can be separated from its congeners by the distal 1/3 of the uncus nearly trapezoid, and the posterior margin concave and bilobed in the male genitalia. It is close to A. phoxopterella in the shape of the distal patch of the forewing, but can be separated from the latter by having a dark brown spot beyond middle of the cell of the forewing, which is absent in A. phoxopterella . It is also close to A. trimaculata sp. nov. superficially, and the differences between them are stated under the latter species.

Distribution. China (Hainan).

Etymology. The specific epithet is derived from the Latin bilobus (two lobes), referring to the two small lobes on the posterior margin of the uncus in the male genitalia.

Figures

FIGURES 5 – 10. Adults of Aulidiotis spp. 5, A. phoxopterella (Snellen), ♂; 6, A. bicolor Moriuti, ♂; 7, A. trimaculata sp. nov., holotype, ♂; 8, A. recta sp. nov., holotype, ♂; 9, A. biloba sp. nov., holotype, ♂; 10, A. sp. (Hainan), ♀. (Scales = 2.0 mm).

FIGURES 11 – 15. Male genitalia of Aulidiotis spp. 11, A. phoxopterella (Snellen), slide No. LLJ 15038; 12, A. bicolor Moriuti, slide No. LLJ 15039; 13, A. trimaculata sp. nov., holotype, slide No. LLJ 15020; 14, A. recta sp. nov., holotype, slide No. LLJ 15103; 15, A. biloba sp. nov., holotype, 15 a, phallus, slide No. LLJ 15105. (Scales = 0.2 mm).