Statherotis muangmaithongi Pinkaew, 2024

Pinkaew, Nantasak, Muadsub, Sopita & Jaikla, Soraya, 2024, Review of the genus Statherotis Meyrick, 1909 (Lepidoptera: Tortricidae: Olethreutinae) from Thailand, with description of a new species, Zootaxa 5536 (4), pp. 536-550 : 542-549

publication ID	https://doi.org/ 10.11646/zootaxa.5536.4.2
publication LSID	lsid:zoobank.org:pub:6577A40A-BFA2-4E30-B5A5-D67309C7FEC1
DOI	https://doi.org/10.5281/zenodo.14239668
persistent identifier	https://treatment.plazi.org/id/E9268415-A740-C944-FF74-F982FCDAFD15
treatment provided by	Plazi
scientific name	Statherotis muangmaithongi Pinkaew
status	sp. nov.

Treatment

Statherotis muangmaithongi Pinkaew , sp. nov.

urn:lsid:zoobank.org:act:4EF3FCD4-D4A4-4832-9BC0-B3CCFB859375

( Figs. 6–7 View FIGURES 1–7 , 13–14 View FIGURES 8–14 , 17 View FIGURES 15–17 , 21–23 View FIGURES 18–21 View FIGURES 22–23 , 28 View FIGURES 24–28 , 33 View FIGURES 29–33 , 35 View FIGURES 34–35 , 37 View FIGURES 36–37 , 39 View FIGURES 38–39 )

Type materials. Holotype: ♂. [ THAILAND]: Phetchaburi Prov., Kaeng Krachan N.P., 12°49.443′N, 99°21.933′E, alt. 974 m, 8.IV.2024, leg. N. Pinkaew et al., np13112 (genitalia slide NP4032). Deposited in KKIC GoogleMaps . Paratypes: 2♂, 1♀. THAILAND: Phetchaburi Prov., same data as holotype, 2.IV.2019, np13938 (♂, genitalia slide NP4199), np13111 (♂, genitalia slide NP4200, wing slide), np13110 (♀, genitalia slide NP4033). All specimens were collected by N. Pinkaew et al. and deposited in KKIC GoogleMaps .

Diagnosis. The wing pattern of Statherotis muangmaithongi sp. nov. ( Figs. 6–7 View FIGURES 1–7 ) is similar to S. amaeboea and S. discana , but it differs by having a grey subtriangular patch on the costa, whereas the patch is light brown in the two latter species. This new species is also similar to S. antisema Diakonoff, 1973 , described from Borneo and Solomon Islands, by the male hindwing having a large anal lobe, which distinguishes these two species from other species in the genus. S. muangmaithongi sp. nov. differs from S. antisema by having a tuft of hair pencils on the hind tibia ( Fig. 21 View FIGURES 18–21 ) and dense scale sockets on the posterior lobes of abdominal segment 8 ( Fig. 28 View FIGURES 24–28 ), which are absent in S. antisema . The male genitalia of S. muangmaithongi sp. nov. ( Fig. 33 View FIGURES 29–33 ) have an anellus that has a widened cupshape and a cucullus with a simple rounded apex and base without a triangular projecting lobe, whereas S. antisema has a narrow anellus surrounding the base of the phallus, a cucullus with an obliquely rounded apex and a wide, triangular projecting lobe at the base. The female genitalia of S. muangmaithongi sp. nov. ( Fig. 34 View FIGURES 34–35 ) are distinct from S. antisema by the shape of signa with widened teeth and rounded apices ( Fig. 39 View FIGURES 38–39 ), whereas the teeth are narrow in S. antisema .

Description. Head ( Figs. 13–14 View FIGURES 8–14 ): Lower frons brown to dark brown, upper frons, vertex, and antenna light brown; labial palpus porrect, first segment greyish white in male, brownish white in female, second segment curved upward, slightly widened towards apex, light grey in male, light brown in female, slightly darker towards apex, with two spots dorsomedially, grey in male, brown in female, apical segment short, obtuse, light brown.

Thorax: Pronotal collar brown; mesonotum greyish brown, with an irregular transverse narrow band on anterior 1/3, posterior scale tufts dark brown; tegulae light brown with dark brown scales on anterior 1/5. Hind tibia in male with modified scales ( Fig. 21 View FIGURES 18–21 ), a tuft of creamy hair pencil originating at base of tibia dorsally and reaching middle of tibia ventrally. Forewing subrectangular, length 6.8–6.9 mm in males (n=3) ( Fig. 6 View FIGURES 1–7 ), 7.1 mm in female (n=1) ( Fig. 7 View FIGURES 1–7 ); costal margin evenly curved; termen rather straight, slightly concave below apex; base of M 2 closer to M 3 than M 1, CuA 1 more strongly curved than other veins ( Fig. 22 View FIGURES 22–23 ); paired costal strigulae separated by dark brown streaks, strigulae 1–3 paired, brownish grey, strigulae 4–7 paired, greyish, alternating with short to moderately long striae, brownish orange, strigulae 8–9 separated into two single strigula; ground color brownish brown, mixed with scattered small spots, brown to dark brown; costal margin with a large, distinct, subtriangular, grey patch between strigula 4 to beyond strigula 7, ventral margin of patch extending downward obliquely from strigula 4 pointing to between base of M 1 and M 2, then strongly curved upward to R 4 near strigula 8, subtriangular patch bordered by median fascia basally, forming brown to dark brown band from costa to midwing, narrowly connected by dark brown with portions of postmedial and preterminal fascia, extending to preapical area below strigula 8, and curved to termen between M 1 and CuA 1, with a large tornal patch, light brownish grey, extending from tornus to between R 5 and M 1 in male and from tornus to M 1 in female, with a row of short, longitudinal narrow lines, dark brown; wing apex with a small dark brown spot; underside light brown with small, white spots along apical 1/3 of costa. Hindwing subtriangular, brown, slightly paler towards wing base, male with a large rounded anal lobe between CuA 1 and 3A ( Figs. 6 View FIGURES 1–7 , 17 View FIGURES 15–17 , 23 View FIGURES 22–23 ), anal margin with slightly enlarged lobe, covered with dense, white, narrow scales, a row of dense, moderately long, narrow scales along basal 2/3 of 3A; underside ( Fig. 23 View FIGURES 22–23 ) light brown, with a large patch of dense, creamy scales on anal area between CuP and anal margin.

Abdomen ( Fig. 28 View FIGURES 24–28 ): Tergum 8 with two enlarged, modified lobes posterolaterally, distally with a large patch of dense scale sockets. Male genitalia ( Fig. 33 View FIGURES 29–33 ) with high tegumen, subrectangular, moderately broad, with dense scale sockets laterally, apical 1/4 of tegumen with pronounced shoulders; uncus a well-developed median process, rounded apex, smooth, ventroapically bipartite with long dense setae; socii small drooping lobes, apices rounded, moderately densely setose; gnathos arising from apical 1/3 of tegumen, sclerotized transverse bands, fused medially forming a moderately large V-shaped process, protruding ventrally; vinculum moderately wide; juxta subtriangular; caulis very short; anellus wide, cup-shaped, surrounding base of phallus; phallus short, moderately widened and tubular, without cornuti; valva long, divided near middle by oblique sclerotized ridge bearing a row of enlarged spiniform setae directed dorsally, spiniform setae longest near middle of ridge, basomedial margin with a small group of dense spiniform setae directed basally; sacculus moderately wide, with a small group of dense setae near ventromedial margin of basal excavation, with elongate patch of moderately dense setae at 1/3 valval length, dorsally with large subtriangular lobe with rounded apex directed dorsally, covered with dense, moderately long spiniform setae; cucullus moderately broad, with rounded apex, densely setose, ventromedially with a moderately large triangular process, pointing outwardly, with three moderately long, spiniform setae. Female genitalia ( Figs. 35 View FIGURES 34–35 , 37 View FIGURES 36–37 , 39 View FIGURES 38–39 ) with papillae anales moderately broad and subtriangular, densely setose; tergum 8 moderately sclerotized, with dense microtrichia, subtriangular lateral extension with moderately dense scale sockets and dense microtrichia; sternum 7 moderately sclerotized, posterior margin moderately concave medially; ostium bursae small, sterigma with lamella postvaginalis moderately sclerotized band, densely microtrichiate, with two oblique sclerotized ridges posterolaterally, ridges anteriorly with two narrow, pendant, elongate processes with rounded apices lateral to ostium ( Fig. 37 View FIGURES 36–37 ); ductus bursae as long as corpus bursae; colliculum narrow and sclerotized for half of ductus bursae length, anterior half of ductus bursae membranous and enlarged; ductus seminalis arising from middle of membranous portion of ductus bursae; corpus bursae large ovate, two signa, both pectinate and consisting of different size of teeth ( Fig. 39 View FIGURES 38–39 ).

Remarks. Specimens of this new species were collected from hill evergreen forest at 974 m.

Etymology. This species is named to honor Samart Muangmaithong, the first chief of the Kaeng Krachan National Park, World Heritage Site, during 1980–1999.