Dicnecidia browni Pinkaew & Muadsub, 2024

Pinkaew, Nantasak, Muadsub, Sopita & Jaikla, Soraya, 2024, A new species of Dicnecidia Diakonoff (Lepidoptera: Tortricidae: Olethreutinae: Eucosmini) from Thailand and Laos, Zootaxa 5471 (3), pp. 365-373 : 366-371

Dicnecidia browni Pinkaew & Muadsub , sp. nov.

urn:lsid:zoobank.org:act:94F06885-F7AA-4D64-8664-505A151E06DC

( Figs. 1–14 )

Type Material. Holotype: ♂. THAILAND: Ubon Ratchathani Prov., Sirindhorn Dam , 15°12ˊ46˝N, 105°26ˊ16˝E, alt. 140 m, 6–7 Mar. 2019, N. Pinkaew et al. leg., np13918 (genitalia slide NP4184). Deposited in KKIC.

Paratypes: 30♂, 1♀. THAILAND: Ubon Ratchathani Prov., same data as holotype, 6–7 Jan. 2019, np12700 (♀, genitalia slide NP 4165), np12725 (♂). Nakhon Phanom Prov., Phu Langka N.P., 17°59ˊ05˝N, 104°08ˊ24˝E, alt. 170 m, 7 Apr. 2023, np13906 (♂, genitalia slide NP 4171), np13907 (♂, genitalia slide NP 4172), np13916 (♂), np13917 (♂); same locality as preceding, 20 Jul. 2023, np13921 (♂); same locality as preceding, 19 Sep. 2023, np13922 (♂), np13923 (♂); Ban Hat Kuan Community Forest , 17°36ˊ56˝N, 104°23ˊ49˝E, alt. 165 m, 17 Jul. 2023, np13904 (♂, genitalia slide NP 4170), np13919 (♂). Bueng Kan Prov., Phuwua W.S. , 18°14ˊ45˝N, 103°57ˊ41˝E, alt. 188 m, 18 Jul. 2023, np12795 (♂, genitalia slide NP 4164), np13920 (♂). Prachinburi Prov., Khao Yai N.P. , 14°10ˊ56˝N, 101°28ˊ39˝E, alt. 201 m, 23 Jan. 2010, np3376 (♂, genitalia slide NP 1347). Nakhon Ratchasima Prov., Sakaerat Environmental Research Station , 14°29ˊ59˝N, 101°54ˊ52˝E, alt. 330 m, 16–19 May 2007, np2401 (♂, genitalia slide NP 2004), np2403 (♂, genitalia slide NP 3056), np2411 (♂, genitalia slide NP 3060, wing slide np2411), np2420 (♂, genitalia slide NP 3057); 14°29ˊ47˝N, 101°54ˊ59˝E, alt. 514 m, 27 Feb. 2014, np6933 (♂, genitalia slide NP 2376); 14°30ˊ28˝N, 101°55ˊ39˝E, alt. 414 m, 25 Oct. 2014, np7337 (♂, genitalia slide NP 2519); 14°30ˊ27˝N, 101°55ˊ45˝E, alt. 400 m, 21 Mar. 2015, np7627 (♂, genitalia slide NP 3058), np7628 (♂, genitalia slide NP 2568). Nakhon Si Thammarat Prov., Khao Nan N.P. , 08°51ˊ47˝N, 99°37ˊ36˝E, alt. 207 m, 24 Nov. 2006, np1781 (♂, genitalia slide NP 814); 08°51ˊ81˝N, 99°37ˊ62˝E, alt. 210 m, 21 Mar. 2007, np2188 (♂, genitalia slide NP 2003); 08°46ˊ55˝N, 99°47ˊ44˝E, alt. 123 m, 1 May 2008, np2690 (♂, genitalia slide NP 1215). Narathiwat Prov., Hala-Bala W.S. , 05°47ˊ49˝N, 101°50ˊ03˝E, alt. 60 m, 23–29 Jan. 2012, np6613 (♂, genitalia slide NP 2862) (all specimens collected by N. Pinkaew et al.). LAOS: Vientiane Prov., Phou Khao Khouay N.P. , 18°21ˊ12˝N, 102°48ˊ85˝E, alt. 740 m, 11 Jun. 2016, pp00191 (♂, genitalia slide PP00245); 18°20ˊ58˝N, 102°46ˊ47˝E, alt. 759 m, 10 Jun. 2016, pp00151 (♂); Xaisomboun Prov., Phou Khao Khouay N.P. , 18°30ˊ15˝N, 102°57ˊ93˝E, alt. 628 m, 3 Jun. 2016, pp00055 (♂), pp00063 (♂, genitalia slide PP 00243); 18°23ˊ69˝N, 103°04ˊ30˝E, alt. 211 m, 4 Jun. 2016, pp00107 (♂) (all specimens collected by P. Phewphanh) (all specimens deposited in KKIC).

Diagnosis. The new species is distinguished from other species in the genus by features of the male and female genitalia. In the male, the uncus is bifurcate, moderately long, very narrow, curved, and with pointed apices. The socii is a distinct small rounded lobe. The gnathos arms are weakly sclerotized, fused medially as a narrow sclerotized narrow band. The cucullus has a small, sclerotized, rounded lobe near the base of the ventral process. In contrast, the two previous known species have a broadly bifurcate uncus with rounded apices; and the cucullus lacks a small lobe at the base. The structures of the socii and gnathos are not entirely clear in the descriptions and/or illustrations of those two species. Female genitalia of D. browni sp. nov. is distinct from D. fumidana by shape of sternum VII, narrowed corpus bursae and rather small corpus bursae in D. browni sp. nov. but widened ductus bursae and enlarged corpus bursae are presented in D. fumidana .

Description. Head ( Figs. 3–4 ): Lower frons yellowish white mixed with light brown, upper frons and vertex brown mixed with dark brown; antenna dark brown, with yellowish white scape; labial palpus porrect, first segment white mixed with brown and dark brown scales, second segment curved upward, slightly widened towards apex, brown mixed with dark brown, with yellowish white margins, apical segment short, obtuse, light brown.

Thorax: Pronotal collar brown mixed with dark brown; mesonotum brown mixed with small dark brown spots medially; tegulae brown with dark brown spots medially. Forewing subrectangular, length 5.2–6.0 mm in males (n = 31) ( Figs. 1–3 ), 5.5 mm in female (n = 1) ( Fig. 4 ); costal margin evenly curved; termen rather straight; paired costal strigulae separated by dark brown streaks, strigulae 1–5 light brown, strigulae 6–9 white; chorda is originated at the middle between base of R 3 and R 4 and extending to base of R 5, base of M 2 distant from M 1 than M 3; ground color brown, mixed with scattered small spots, dark brown; basoventral 1/3 with dark brown, oblong-subtriangular basal patch; median fascia distinctly curved and oblique, moderately broad, extending outward from middle of costa to near tornus, outer edge with moderately broad, silvery grey band, extending obliquely from strigula 5, widened slightly to tornus, beyond with a narrow, silvery grey line, extending from strigula 6 obliquely outward to near termen between R 5 and M 1, with a large cream, transverse patch, between median fascia and termen and between R 2 and tornus, with a transverse, oblique row of strigula 7 longitudinal, rather short dashes inside, dark brown, apex with small, transverse mark, dark brown, with irregular, narrow line, dark brown along termen broken by cream scales; fringe scale dark brown except brown between M 2 and CuA 2; underside light brown with creamy spots on apical half of costa, with a small dark brown spot at apex; with a transverse narrow line, extending along termen from strigula 9 to between CuA 1 and CuA 2. Hindwing subtriangular, brown, slightly paler to wing base, subhyaline; underside light brown; M 3 and CuA 1 with a very short stalk near ventral corner of discal cell, base of M 2 closer to stalk of M 3 and CuA 1 ( Fig. 7 ).

Abdomen ( Fig. 8 ): Segment VIII with two lateral lobes on posterior margin, with rounded apices and dense scale sockets. Male genitalia ( Figs. 9–10 ) with tegumen subtriangular, rather narrow, with moderately dense scale sockets laterally; uncus bifurcate, narrow, curved, horn-shaped, tapering towards pointed apex, moderately dense setae medially; socii small, rounded, lobe-like, with moderately dense setae ( Figs. 11–12 ); gnathos arising from 1/2 of tegumen, weakly sclerotized, fused medially; vinculum moderately wide; juxta subtriangular, moderately large; caulis very short; anellus wide, roundish cup-shaped, surrounding base of phallus; phallus moderately long and wide, curved medially, slightly wider at base, with dense cornuti, long and narrow, slightly shorter than phallus; valva somewhat parallel-sided beyond sacculus, curved; sacculus with a large ventrobasal lobe, convex, smooth, with a longitudinal row of long spiniform setae below ventral margin of basal excavation, extending from near middle of sacculus reach to a small ventral lobe, median area of valva with a large subtriangular patch of dense setae, slightly narrow to cucullus, and setae slightly shorter to apex; neck wide, 1/3 length of valva; cucullus rather small, 1/3 length of valva, dome-shaped, rounded apically, densely setose, with row of short, moderately dense spines along outer margin, with a small digitate ventral process, directed ventrally, apex with two strong spines, one longer inside and one shorter outside, next to ventral process ventrally with a small group of a row of long, strong spiniform setae along outer margin, with a small pendant lobe, rounded apex, densely setose beyond ventral process laterally. Female genitalia ( Figs. 13–14 ) with papillae anales moderately broad, densely setose; tergum VIII moderately sclerotized, subtriangular lateral extension with moderately dense scale sockets; sternum VII moderately sclerotized, sub-semicircular, with dense scale sockets, posterior margin deeply concave medially, with a narrow, transverse, curved sclerotized process, with apices pointing ventrolaterally, below with roundish ostium bursae; colliculum moderately long, constricted medially, 1/6 of ductus bursae length, ductus bursae long, about 1/3 length of corpus bursae; ductus seminalis arising from anterior 1/3 of ductus bursae; corpus bursae ovate, with two bladeshaped signa.

Distribution. Thailand (Northeast: Bueng Kan, Nakhon Phanom, Nakhon Ratchasima, Ubon Ratchathani; East: Prachinburi; South: Nakhon Si Thammarat, Narathiwat) and Laos (Vientiane, Xaisomboun)

Etymology. This species is named to honor Prof. Richard L. Brown., Director Emeritus, Mississippi Entomological Museum.

Figures

FIGURE 7. Wing venation of Dicnecidia browni sp. nov. (paratype, np2411).

FIGURE 8. Abdomen of Dicnecidia browni sp. nov. with two posterolateral lobes on abdominal segment, sternum VIII (holotype).

FIGURES 1–2. Living specimens of Dicnecidia browni sp. nov. 1. Dorsal view. 2. Lateral view.

FIGURES 3–4. Wing pattern of Dicnecidia browni sp. nov. 3. Male (holotype). 4. Female (paratype, np12700), scale bars = 2 mm.

FIGURES 5–6. Head of Dicnecidia browni sp. nov. 5. Male (holotype). 6. Female (paratype, np12700).

FIGURES 9–10. Morphological features of male genitalia of Dicnecidia browni sp. nov. 9. With upward uncus (holotype). 10. With downward uncus (paratype, NP4164).

FIGURES 11–12. Enlarged uncus, socii and gnathos of male genitalia of Dicnecidia browni sp. nov. 11. With upward uncus (holotype). 12. With downward uncus (paratype, NP4172).

FIGURES 13–14. Female genitalia of Dicnecidia browni sp. nov. (paratype, NP4165). 13. Female genitalia. 14. Extended parts of sterigma, ostium bursae and colliculum.