Loboschiza flavobasis Heppner & Bae

Heppner, John B. & Bae, Yang-Seop, 2016, Two new species of Loboschiza from Cambodia and Vietnam (Lepidoptera: Tortricidae: Olethreutinae: Enarmoniini), Zootaxa 4169 (1), pp. 171-178 : 175-178

Loboschiza flavobasis Heppner & Bae , new species

( Figs. 9–12 )

Type locality. Ba Be National. Park, Bac Kan Province, Vietnam.

Diagnosis. This species can be separated easily from all other Loboschiza species by its strongly marked forewing with the basal 2/3 uniformly yellow; in other species the base of the forewing usually has some indistinct strigulae. The male genitalia lack a concave indentation along the ventral margin of the valva. The male genitalia of L. exemplaris have uncus-like socii arms extended dorsally, whereas the tegumen is rounded dorsally in L. flavobasis and other Loboschiza species.

Description. Male ( Fig. 9 ). Head ( Figs. 10–11 ): Vertex light yellow; frons white; labial palpus white basally to middle of segment II, then brown, gradually becoming light yellow distally, with mesal side light yellow; antenna yellow on basal 1/4, then pale tan. Thorax: Dorsum brown, margined with yellow on tegulae; patagia yellow; venter cream-white. Legs cream-white on coxae and femur; foretibia dark gray on dorsal edge; midtibia tan-yellow, with 2 rings of gray-brown; hindtibia gray on dorsal edge; mesally all legs pale tan; fore- and mid-tarsi light tan with dark gray distally on each segment; hind-tarsi gray with light tan on distal margin of each segment. Wingspan 9.0 mm (n = 1); forewing mostly yellow, with outer 1/3 dark brown, overlain with several curved and irregular pale brown striae from costal margin to tornus; fringe dark brown; venter gray-tan with few dark gray spots on apical 1/ 4 and some gray strigulae on costal margin. Hindwing dark brown; fringe concolorous with wing; venter gray, with tan-gray costal margin. Abdomen: Dark brown, brown-yellow on tergite 2; venter dull cream-white; genital tufts tan and ventrally gray-white; sternal pregenital plate a sharply pointed triangle; anterior of abdomen lacking interapodemal fan-shaped arrangement of spines, but with small spines along the inter-apodeme margins and a long setal coremata from near each apodeme. Male genitalia ( Fig. 12 ) with tegumen triangular, narrowed dorsally, lacking uncus; socius laterally setose and fold-like, and extended dorsally as pair of extended setose, short projections; vinculum with reduced to sharply rounded saccus; valva short, angled dorsally and setose, uniform in width in basal one-half (to the outer 1/2), with dorsal bulbous margin; sacculus a small quadrate setose exvagination, while rest of saccular margin nearly straight, with small apical hook on pointed cucullus; juxta somewhat tubular, short, with lateral flat but carinate sides; anellus a short dorsally open tube, slightly bent; aedeagus long and thin (subequal in length to valva), with dense patch of deciduous long and lanceolate cornuti (ca. 60).

Female. Unknown.

Specimens studied. Holotype male: Vietnam: Ba Be National Park (240 m), 21–26 Jun 2008, J. B. Heppner (genitalia slide 3375) ( MGCL) . Deposited in MGCL.

Etymology. Named for the yellow base of the forewings.

Biology. Unknown.

Distribution. Known only from northern Vietnam.

Discussion. The genitalia of the new species are somewhat similar to those of Loboschiza exemplaris (Meyrick) from northern Australia, but the forewing maculation is quite different. This species is known from the single specimen from Ba Be Park in northern Vietnam, similar to many species in the genus which are known only from singletons, as noted by Horak (2006).

Figures

FIGURE 9. Loboschiza flavobasis n. sp., male holotype (9 mm wingspan), Vietnam.

FIGURES 10 – 11. Loboschiza flavobasis n. sp., male, head (lateral and dorsal views).

FIGURE 12. Loboschiza flavobasis n. sp., male genitalia (aedeagus in situ). a) central area of genitalia; b) anterior of abdomen (ventral view); and c) pregenital sternal plate (genitalia slide JBH 3375).