Caloptilia rhynchosiae, Yagi & Goto & Sohn, 2024

Yagi, Sadahisa, Goto, Kiyoshiro & Sohn, Jae-Cheon, 2024, A new species of Caloptilia (Lepidoptera: Gracillariidae) from Japan and Korea, Zootaxa 5446 (3), pp. 420-432 : 422-425

publication ID

https://doi.org/ 10.11646/zootaxa.5446.3.6

publication LSID

lsid:zoobank.org:pub:53DDAD04-D822-48BE-B68A-BAFABDDB3C37

DOI

https://doi.org/10.5281/zenodo.11166666

persistent identifier

https://treatment.plazi.org/id/71C0DD08-3914-444B-B0E2-673BED4E3441

taxon LSID

lsid:zoobank.org:act:71C0DD08-3914-444B-B0E2-673BED4E3441

treatment provided by

Plazi

scientific name

Caloptilia rhynchosiae
status

sp. nov.

Caloptilia rhynchosiae n. sp.

( Figs 1–18 View FIGURES 1–3 View FIGURES 4–7 View FIGURES 8–10 View FIGURES 11–18 )

Diagnosis. This species is similar to Caloptilia leucothoes Kumata, 1982 in the external appearance and also to C. sapporella ( Matsumura, 1931) in having the cucullus through a neck in the male genitalia. It differs from the latter two in the presence of a saccular process on the valva of the male genitalia. In the female genitalia, C. rhynchosiae n. sp. is similar to C. soyella in having the entirely-membranous ductus bursae. It, however, differs from the latter in the presence of the roundly-bulged basal area of ductus seminalis (narrow and then bulged in C. soyella ) and a mortar-shaped sterigma (M-shaped in C. soyella ).

Description. Habitus ( Figs 1–3 View FIGURES 1–3 )—No sexual dimorphism exhibited.

Head: Vertex brownish gray, with purple luster, tinged with white anteriorly; frons creamy white. Antenna ca. 1.1x longer than forewing; scape brownish gray; flagellum brownish gray with pale brownish gray annulations. Labial palpus upcurved; 1 st segment 1/4 as long as 2 nd segment, white; 2 nd segment as long as 3 rd segment, white to cream, intermixed with dark brown scales ventrally; 3 rd segment acuminating apically, white to cream, tinged with dark brown on distal 1/3.

Thorax: Patagium brownish gray; tegula and mesonotum pale-purplish gray, intermixed with pale grayish orange scales. Forewing length 3.8–4.3 mm, narrow, yellow, intermixed with lustrous, purplish brown scales on dorsal and distal areas; costa with 6–14 black strigulae, tinged with dark brownish gray basally; three apical strigulae black in some individuals; often one or two spots present at basal 1/4 and 1/2 of forewing; cilia dark brownish gray, peppered with pale gray on apical area and termen. Hindwing dark brownish gray, paler to base; cilia dark brownish gray. Fore- and midlegs with coxa, femur and tibia dark brown, sparsely irrorated with pale brownish gray; tarsomere white, with black ring distally. Hindleg with coxa cream, sparsely peppered with dark brown; femur pale gray with dark brown band at basal 3/5 laterally; tibia pale gray dorsally, white ventrally, intermixed with dark brown scales distally; tarsomeres pale brownish gray.

Abdomen: terga lustrous, gray; sterna white or pale gray.

Male genitalia ( Figs 4–7 View FIGURES 4–7 )—Tegumen linguiform, narrowed basally; subscaphium of even width. Valva narrow, of even width in basal half; cucullus subtriangular, long-hairy except distal area with short setae; sacculus broad, 2/5 as long as valva, with large horn-like process at distal end. Vinculum linguiform, narrowly-round apically. Phallus narrow, slightly narrowed distally, with 14–20 cornuti.

Female genitalia ( Figs 8–10 View FIGURES 8–10 )—Papilla analis pad-shaped. Apophysis posterioris broad basally, as long as apophysis anterioris; apophysis anterioris relatively broad, tapering distally. Ostium bursae present between sternite VII and VIII. Sterigma well-sclerotized, mortar-shaped with minute granules. Ductus bursae entirely membranous, with minute granules between ostium bursae and opening of ductus seminalis. Ductus seminalis arising from the posterior 4/5 of ductus bursae, roundly-bulged basally. Corpus bursae ovate, wrinkled; a pair of signa curved, sickle-shaped, with dentate inner margins.

Types. Holotype —male, Korea: Jeonnam Prov., Sinan-gun, Is. Jaeundo, Jaeun-myeon, Gojang-ri , Oegi sand-dunes (34°53′44.5″N 126°00′27.4″E), 16 July 2017 (JC Sohn), GJUE. GoogleMaps

Paratypes (8♂ 7♀)—[ Japan] 1♂, Kyushu, Fukuoka Pref., Fukuoka-shi, Nishi-ku , Kuwabara , Ito Campus of Kyushu University (33°35’52.8”N 130°13’00.5”E), 2 June 2020, larva on Rhynchosia tomentosa , emerged on 10 June 2020 (S Yagi), [GSN] SY1326, [COI] SaY777, ELKU GoogleMaps ; 3♂ 3♀, ditto, 3 July 2023, larvae on Rhynchosia tomentosa , emerged on 6–29 August 2023 (S Yagi), [GSN] SY1506 (♀), SY1508 (♂), ELKU GoogleMaps ; 1♀, Kyushu, Kumamoto Pref., Uki-shi, Matsubase-machi , Toyofuku , 28 June 2023, larva on Rhynchosia tomentosa , emerged on 1 August 2023 (K Goto), ELKU ; 1♂ 1♀, ditto, 13 July 2023, larvae on Rhynchosia tomentosa , emerged on 24 & 26 July 2023 (K Goto), ELKU ; 2♀, ditto, 16 August 2023, larvae on Rhynchosia tomentosa , emerged on 28 August & 1 September 2023 (K Goto), ELKU . [ Korea] 2♂, same data as holotype, [GSN] SJC-1253, [COI] JCS-COI D-325, GJUE & NIBR GoogleMaps ; 1♂, Gyeongnam Prov., Is. Geoje-do, Jangmok-myeon, Jangmunpo-waeseong (castle), 18 June 2004, [GSN] SJC-792, GJUE .

Distribution. Japan (Kyushu) and South Korea.

Etymology. The species epithet is derived from the generic name of the host plant.

Host plants. Fabaceae Rhynchosia tomentosa var. tomentosa (L.) Hook, & Arn.

Biology. This species has been collected from the sand-dunes and coastal forests in Korea and the low mountain areas in Japan. These habitats are matching with where its host plants occur. The young larvae made a linear-blotch mine on the underside of a leaf or a trumpet-shaped mine on the upper side of a leaf ( Figs 11–12 View FIGURES 11–18 ). The later instars of larvae made a cigarette-like leaf roll. The spindle-shaped cocoons ( Fig. 17 View FIGURES 11–18 ) were formed inside/outside of the rolls. The larvae were collected mainly from the places that get a lot of sunshine from June to August and they were emerged in June to September, suggesting two or more generations per year.

NIBR

National Institute of Biological Resources

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