taxonID	type	description	language	source
B65D216F5B58B319FF211693E6AACBFD.taxon	description	(Figures 2 A, 3 A)	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211693E6AACBFD.taxon	materials_examined	Type material. Holotype ♀. [GW] Eodowon-gil, Bukpyeong-myeon, Jeongseon, 27 v 2025 (leg. JI Oh), gen. slide no. HNUSEL- 3236 - coll. HNUSEL. Paratypes. [GW] 2 ♀, Eodowon-gil, Bukpyeong-myeon, Jeongseon, 27 v 2025 (leg. JI Oh), gen. slide no. HNUSEL- 3234, 3235 - coll. NIBR & HNUSEL. 1 ♀ Moonsan-ri, Youngweol, 7 vi 1986 (leg. BK Byun), gen. slide no. HNUSEL- 6468 - coll. HNUSEL.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211693E6AACBFD.taxon	diagnosis	Diagnosis. This species is morphologically very similar to B. altera Seksjaeva, 1989, but it can be distinguished in the female genitalia by the smaller ostium bursae, the presence of a pair of processes with three hardened bundles of spines on the anterior apophyses region, and the signa covering up to two-thirds of the corpus bursae.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211693E6AACBFD.taxon	description	Description. Adult (Figure 2 A). Female. Head: Creamy white; frons smooth and shining, vertex and crown slightly raised with creamy to pale ochreous piliform scales. Antennae filiform, approximately 0.75 – 0.80 × forewing length, white with alternating pale brown annulations; scape with a distinct white eye-cap tinged with light orange. Labial palpi slender, porrect, extending slightly beyond frons, clothed with whitish scales. Legs: Creamy white; fore- and mid-tibia slightly shaded with pale ochreous. Hind tibia with long piliform scales forming a loose brush; tarsal segments faintly ringed with pale brown. Thorax: Creamy white to pale ochreous, occasionally with faint brownish speckles dorsally. Tegula concolorous with thorax, narrowly fringed with whitish scales. Forewing: Wingspan 6.0 – 6.5 mm. Forewing narrow, lanceolate; costa gently arched. Ground color white to creamy white, covered with scattered brownish speckles. Two faint but distinct pale brown costal spots present — one near the basal one-third, another at the midsection of the costa. Apical area sometimes dusted with pale brown scales. Cilia long, silky white. Hindwing: Pale creamy white, slightly translucent, narrower than forewing; costa straight, termen oblique. Cilia long, silky white, approximately equal to wing width. Abdomen: Slender, creamy white to pale beige; dorsal surface covered with fine whitish scales. Male. Unknown. Female genitalia (Figure 3 A). Papillae anales sclerotized, broadly oval, densely covered with short fine setae. Apophyses anteriores weak or nearly absent, while apophyses posteriores slender, elongate, and extending slightly beyond the papillae anales. Ostium bursae small and rounded, located at the anterior margin of sternite VIII. Antrum weakly funnel-shaped, moderately sclerotized. Ductus bursae membranous, slender, weakly sclerotized along the posterior portion, gradually widening near the middle, then narrowing toward the corpus bursae. Corpus bursae large, elongate-oval, membranous, densely covered with fine microspinules; signum elongate and plate-like, occupying nearly two-thirds of the corpus bursae, composed of vertically aligned comb-like ridges and a faint central band. A pair of processes with three small clusters of spines are present at the anterior apophysis region, a diagnostic feature that separates this species from B. altera and allied taxa. Ductus seminalis originates near the junction between the posterior ductus bursae and the anterior corpus bursae. DNA barcodes. This new species, Bucculatrix bipuncticosta sp. nov. has a genetic distance of 12.4 % from B. pyrivorella, showing a distinct genetic divergence from neighboring species from Korea.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211693E6AACBFD.taxon	distribution	Distribution. Korea (endemic).	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211693E6AACBFD.taxon	biology_ecology	Host plant. Unknown.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211693E6AACBFD.taxon	etymology	Etymology. The species name “ bipuncticosta ” is derived from the Latin words bi- (meaning “ two ”) and punctum (“ spot ”) combined with costa (“ forewing margin ”), referring to the two distinct brownish spots along the costal margin of the forewing, which are diagnostic for this species.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B58B319FF211628E7EDCD75.taxon	type_taxon	<Type species: Lyonetia albedinella Zeller, 1839>	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B59B31FFF211164E16BCE89.taxon	description	(Figures 2 B, 3 B)	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B59B31FFF211164E16BCE89.taxon	description	Forewing creamy white, suffused with yellowish scales and light brown tips; with two distinct costal spots, one before the middle and another beyond the middle of the wing; the first spot often appears as an oblique blurred streak, covered with sparse black-tipped scales, and followed by a brown patch beyond the middle of the dorsal margin; sometimes only one costal streak is visible, ending with a dark brown dot near the outer angle of the wing. Hindwing light brown, evenly covered with yellowish scales. Male genitalia (Fig. 3 B). Socius short and slender, sparsely setose apically. Valvae short, broadly oval, slightly narrowed distally, separated at base; costa smoothly curved, sacculus narrow, reaching about two-thirds of valva length. Vinculum slender, moderately sclerotized, forming a shallow U-shaped saccus. Juxta slender and weakly sclerotized, extending medially below the aedeagus. Aedeagus short, straight, weakly sclerotized, slightly tapered toward the apex; rounded. Female genitalia. Unknown in Korea (see Kobayashi et al. 2010)	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B59B31FFF211164E16BCE89.taxon	materials_examined	Material examined. [GW] 1 ♂, Cheongpyeongsa, Obongsan-gil, Buksan-myeon, Chuncheon, 14 Jun 2021 (leg. NH Ahn), gen. slide no. HNUSEL- 7249 - coll. HNUSEL. 1 ♂, Odae mountain, Nae-myeon, Nae-myeon, 27 May 1991 (leg. BK Byun), gen. slide no. HNUSEL- 6893 - coll. HNUSEL.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B59B31FFF211164E16BCE89.taxon	distribution	Distribution. Korea (new record), Japan, Russian Far East.	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
B65D216F5B59B31FFF211164E16BCE89.taxon	biology_ecology	Host plant. Quercus crispula Blume, Q. dentata Thunb., Q. serrata Thunb. [Fagaceae] in Japan (Kobayashi et al. 2010); Prunus jamasakura Siebold ex Koidz [Rosaceae] in Korea. (In this study).	en	Oh, Jae-In, Ahn, Neung-Ho, Lee, Ji-Young, Kim, Sang-Yoon, Jeong, June-Hyeok, Song, Young-Gwang, Cho, Kyung-Ho, Byun, And Bong-Kyu (2026): A new species and a new record of the genus Bucculatrix Zeller, 1839 (Lepidoptera: Bucculatricidae) from Korea. Zootaxa 5750 (1): 139-144, DOI: 10.11646/zootaxa.5750.1.9, URL: https://doi.org/10.11646/zootaxa.5750.1.9
