Metendothenia chanthaboonica, Pinkaew & Muadsub, 2021

Pinkaew, Nantasak & Muadsub, Sopita, 2021, A new species of Metendothenia Diakonoff, 1973 (Lepidoptera: Tortricidae Olethreutinae) from Thailand, Zootaxa 4996 (1), pp. 177-182 : 178-181

Metendothenia chanthaboonica sp. nov.

urn:lsid:zoobank.org:pub:72390C1D-BEEF-4662-AD18-BFAAC17F0A81

( Figs. 1–9 )

Type material. Holotype. ♂. THAILAND: Chanthaburi Prov., Khao Khitchakut N.P., 12 o 51ʹ04ʺN, 102 o 12ʹ10ʺE, alt. 98 m, 14–15 Dec 2012, Pinkaew et al. leg.; np5580 (genitalia slide NP1863), KKIC . Paratype: 1♂. THAILAND: same data as holotype, np5577 (♂, genitalia slide NP1866), KKIC .

Diagnosis. The male genitalia of Metendothenia chantaboonica sp. nov. are most similar to those of M. emmilta Diakonoff but differ in several features. In M. emmilta the apex of the uncus is truncated with two sets of spines, whereas in M. chantaboonica it is excavated and V-shaped with three sets of spines. In M. emmilta the cucullus of the left valva lacks a rounded angle basoventrally, which is present in M. chantaboonica . In M. emmilta the right cucullus has a subtriangular lobe with a rounded apex ventrobasally, whereas in M. chantaboonica there is a distinct triangular lobe with an acuted apex. In M. emmilta the costal process of the left valva has one large group of dense spines, whereas in M. chantaboonica the process is separated into two groups. In M. emmilta the phallus is short and curved medially, whereas in M. chantaboonica it is longer and curved in the basal 1/3.

Description. Head ( Fig. 2 ): Lower frons white, upper frons light brown, vertex brown mixed with light brown; labial palpi porrect, rather long; first segment yellowish white, second segment long and slender, margins parallel, basal half white to yellowish white with dark brown spots dorsally, apical half yellowish white mixed with light brown, with scattered dark brown scales; third segment light brown with scattered dark brown scales dorsobasally; antenna brown, reaching middle of forewing.

Thorax: Pronotal collar and tegulae brown, mesonotum and posterior crest brown mixed with light brown; hind tibia with a tuft of brownish hair pencils inside groove ( Figs. 5–6 ). Forewing oblong, length 11.4–12.7 mm in male ( Fig. 1 ) (n = 2); costal margin mostly rather straight except strongly curved at wing base and slightly curved before rounded apex; termen round, with pinkish red scales along apical half of costa to termen; costal strigulae well developed especially in apical half of wing, whitish marks separated by blackish streaks; ground color grey, with large irregular subtriangular patch, 1/3 of wing length, extending obliquely from wing base to between Sc and R 1, brown mixed with dark brown, margined with light brown scales, dorsum with a large semicircular patch, brown mixed with dark brown, edged with light brown scales, extending from basal 1/3 to tornus and from dorsum to beyond middle of wing width, upper margin irregular, edged with light brown scales, apical 1/5 of patch broken by transverse ground color, with a sinuate band, extending obliquely from middle of costa to near termen between M 2 and M 3, dark brown, basal half edged with brownish red scales, apical half edged with light brown scales, with dark brown narrow stripe from wing apex between R 3 and R 4 to M 3 broken by a white spot between M 1 and M 2, with dif- fuse, short transverse dark brown striae alternated with light brown scales along termen between M 3 to tornus; fringe scales with inner row dark brown and outer row brown extending from wing apex to tornus except light brown between CuA 2 to tornus; underside brown, apical half of costa with white spots. Hindwing brown, slightly paler to base; anal margin modified in male, folded edge, greyish white ( Fig. 3 ); underside light brown with thickened, folded anal margin in male, greyish white, with a patch of dense, moderately long appressed greyish brown scales on CuA 2 medially, with a tuft of moderately long, light brown hair pencils near humeral angle beneath costa, extending oblique to closed cell basally, with very long light brown hair pencils, originating from mesothorax beneath tegulae, extending to beyond anal angle of hindwing, some insert into patch of appressed scales on CuA 2 ( Fig. 4 ).

Abdomen: Male genitalia ( Figs. 7–9 ). Tegumen moderately wide with rounded shoulders; uncus moderately long, hourglass-shaped, basal half with dense scale sockets laterally, apex excavated medially with a row of spines, each corner with two distinct spines, one longer protruding ventrally, other shorter and more curved, protruding posteriorly ( Fig. 8 ); socii large, pendant to near mid-length of tegumen, with rounded apex, covered with very long, dense setae; gnathos arising from mid-length of tegumen, a moderately sclerotized, wide band, fused medially forming subquadrate process pointed ventrally; vinculum moderately wide; juxta subtrapezoidal; caulis short, anellus large, rounded bilobed, weakly sclerotized; phallus rather long, basal 1/3 widened, abruptly narrowed ventrally, apical 2/3 very slightly widened to pointed hooked apex, with patch of small, dense denticules ventromedially ( Fig. 9 ), without cornuti; valvae asymmetrical; left valva with moderately large basal excavation, with a large dorsal subquadrate process, anterior surface densely setose, posterior surface with two groups of dense, strong spines basally, outside group smaller with equally long spines, inside group larger with uniformly long spines and a row of short, narrow spines extending inward, beneath process with a row of sparsely short setae; sacculus with moderately dense setae basally, with sparsely setose along margin of basal opening extending to a small, densely setose lobe, apicomedially with two distinct strong spines pointing inward, beneath with group of dense, long spiniform setae; neck forming a moderately deep excavation ventrally, with another group of long spiniform setae contiguous with patch of dense, long spines along ventrobasally of cucullus; cucullus moderately long, widened basally, ventrobasally angle forming rounded lobe, medially narrow and slightly dilated to rounded apex, densely bristled, basal 1/4 with a moderately wide, transverse sclerotized band, topped with a group of dense, moderately long spines; right valva with a moderately large basal excavation, with a large dorsal subtrapizoidal process, anterior surface densely setose, posterior surface densely setose along dorsal margin, with two groups of strong spines basally, outside group with a distinct long spine, inside group larger with one long and one shorter spine and a row of short and narrow spiniform setae extending inward, sacculus with moderately dense setae basally, with sparsely setose along basal opening margin contiguous with a small densely setose subtriagular lobe, ventroapical margin with moderately dense setae; neck a moderately deep excavation, upper margin with two distinct strong spines pointing obliquely inward; cucullus moderately long, ventrobasally forming a triangular lobe pointing ventrally, with sparse short setae, apical 2/3 of cucullus slender, clavate, with rounded apex, inner side densely setose.

Distribution. Thailand (Chanthaburi province).

Etymology. The specific epithet refers to Chanthaburi province, the type locality.

Figures

FIGURES 1–2. Adult of Metendothenia chanthaboonica sp. nov. (holotype, male). 1. Wing pattern 2. Head, scale bars = 2 mm.

FIGURES 3–6. Hind wing and hind tibia of Metendothenia chanthaboonica sp. nov. (holotype, male). 3–4. Hind wing 3. Anal marginal fold (upperside) 4. Underside with two groups of hair pencils (A and B) and a patch of modified scales (C) (red arrows) 5–6. Hind tibia 5. Inner side with a tuft of hair paencil inside groove 6. Extended hair pencil in situ (red arrow).

FIGURES 7–9. Male genitalia of Metendothenia chanthaboonica sp. nov. 7. Male genital capsule. 8. Uncus. 9. Phallus with patch of short denticules (red arrow).