taxonID	type	description	language	source
3770A61D605D9914FF3DFC5941A5CBDB.taxon	description	Figures 2, 2 a, 4 – 6	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605D9914FF3DFC5941A5CBDB.taxon	diagnosis	Diagnosis. The new species is similar to B. tsurubamella Kobayashi, Hirowatari et Kuroko, 2010, but can be distinguished by the following characters: i) the forewing is densely covered with brown scales, only a small part of which can be seen with white background, ii) the valvae are almost completely fused, and iii) the phallus is about twice as long as length of valva + vinculum. In B. tsurubamella, the forewing is white with a few orange or light orange-brown streaks and patches, the valvae are fused only on basal half, and the phallus is almost as long as valva (Kobayashi et al. 2010: 42, Fig. 8 F).	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605D9914FF3DFC5941A5CBDB.taxon	materials_examined	Type material. Holotype ♂, CHINA, Jiangxi province, Longnan county, Anji Mt., 25 ° 52.38 ′ N, 114 ° 36.16 ′ E, 1300 m, 2018. v. 25, leg. Tengteng Liu, registration SDNU. Ent 000428 (genitalia and DNA barcode no. SDNU. LIU 0155). Adult (Fig. 2). Forewing length 2.5 mm. Face dark gray, frons grayish white, scale tuft on vertex reddish brown, mixed with dark brown in central. Labial palpus minute, grayish white. Antenna with eye cap white, tinged reddish brown basally; first flagellomere notched in male (Fig. 2 a); flagellum white with distinct black ring on each unit, 6 th to 10 th and 13 th to 17 th units counted from apex black dorsally. Legs yellowish white, black on outer surface of tibiae, with dense long gray piliform scales on hind tibiae. Forewing ground color white, densely covered with brown scales; one costal streak on distal 2 / 5, dark brown, extending to tornus, with numerous black scales near costa and tornus on outer margin; area beyond preceding streak white with sparse brown scales; dorsum with a cluster of black scales mesally; cilia grayish, black distally around apex. Hind wing grayish brown, cilia gray. Abdomen gray dorsally, grayish white ventrally. Male genitalia (Figs 4 – 6). Socii distinct, with several long setae (Fig. 5). Tegumen broad, more or less rectangular, length 1.5 times width; membranous ventrally, with micro spines. Valvae almost completely fused, with only a small notch at middle distally, cylindrical, twice longer than wide, with sparse setae on apex; basal process of costa slender, as long as vinculum. Vinculum somewhat triangular. Phallus thick and straight, about twice as long as length of valva + vinculum, phallobase membranous; cornutus indistinct. Scale-sac oval (Fig. 6).	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605D9914FF3DFC5941A5CBDB.taxon	distribution	Distribution. China (Jiangxi). Only known from the type locality.	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605D9914FF3DFC5941A5CBDB.taxon	etymology	Etymology. The specific name is derived from the Latin adjective “ coadnatus ”, meaning fused, indicating the valvae of the male genitalia almost completely fused with each other.	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605D9914FF3DFC5941A5CBDB.taxon	discussion	Remarks. DNA barcode analysis using a partial barcode did not assign this species to any proper group (Fig. 1). It may be related to B. ulmella group in the sense of Baryshnikova (2008) and group 10 in the sense of Kobayashi et al. (2010) judged by the reduced valvae and the short and straight phallus.	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605C9911FF3DFB5246D7CDD5.taxon	description	Figures 3, 3 a, 9 – 12	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605C9911FF3DFB5246D7CDD5.taxon	diagnosis	Diagnosis. The new species is closely related to B. crataega and the North American B. pomifoliella on the male genitalia. From B. crataega, the new species can be separated by: i) the strongly sclerotized and black distal part of the valva, ii) the furcated cornutus and iii) the almost semicircular vinculum; in B. crataega, the distal part of the valva is not as such strongly sclerotized and black (Fig. 7), the cornutus is composed of a series of micro spines (Fig. 8) and the vinculum is triangular on anterior margin (Fig. 7). From B. pomifoliella, the new species can be distinguished by: i) the cornutus composing of a series of micro spines and ii) the triangular vinculum (Braun 1963: 175, Fig. 228).	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605C9911FF3DFB5246D7CDD5.taxon	materials_examined	Type material. Holotype, ♂, CHINA, Zhejiang province, Tianmu Mt., 30 ° 20.27 ′ N, 119 ° 24.34 ′ E, 700 m, 2018. vi. 15, leg. Tengteng Liu, registration SDNU. Ent 000236 (genitalia and DNA barcode no. SDNU. LIU 0156). Adult (Fig. 3). Forewing length 2.5 mm. Face and frons white, scale tuft on vertex white, mixed with orange in central. Labial palpus minute and white. Antenna with eye cap white, posterior half with brown scales dorsally, first flagellomere notched in male (Fig. 3 a); flagellum blackish gray dorsally, 4 th to 7 th and 10 th to 13 th units counted from apex black dorsally. Legs yellowish white, black on outer surface of tibiae, with dense long yellow piliform scales on hind tibiae. Forewing ground color white, two golden costal streaks at basal 2 / 5 and 3 / 5, with scattered black scales near costa, outwards obliquely, jointed at apex of cell, the outer streak continue extending to tornus; a golden stripe along fold, below with a black dot at distal 2 / 5; a black dot above tornus; apical area golden; cilia grayish white, black distally around apex. Hind wing and cilia yellowish gray. Abdomen yellowish gray dorsally, yellowish white ventrally. Male genitalia (Figs 9 – 12). Socii developed, about 1 / 3 length of tegumen, with sparse long setae (Fig. 10). Tegumen sclerotized on lateral margin, straight on posterior margin. Valvae not fused with each other, heavily sclerotized towards apex, black on distal part; bifurcated distally, ventral branch curved inwards distinctively, rounded apically, dorsal branch slightly curved inwards, narrowed towards apex, bluntly pointed apically. Vinculum almost semicircular, more sclerotized and slightly protruded anteriorly. Phallus about 2.5 times as long as length of valva + vinculum, basal 1 / 3 arched, median 1 / 3 straight, then curved by 150 °, distal 1 / 3 straight; basal 2 / 3 spindle-shaped together with membranous phallobase; cornutus a sclerotized spine, about 1 / 7 length of phallus, unequally bifurcated and curved distally. Scale-sac broad and rounded (Fig. 12).	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605C9911FF3DFB5246D7CDD5.taxon	distribution	Distribution. China (Zhejiang). Only known from the type locality.	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605C9911FF3DFB5246D7CDD5.taxon	etymology	Etymology. The specific name is derived from the Latin adjective “ niger ” and “ valva ”, indicating the black distal part of the valva in the male genitalia.	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
3770A61D605C9911FF3DFB5246D7CDD5.taxon	discussion	Remarks. This species is associated with B. bechsteinella group in the sense of Baryshnikova (2008) and is closest to B. pomifoliella on the basis of morphological characters. However, the genetic uncorrected distance between B. nigerivalva and B. pomifoliella is the largest among the species group (Table 2).	en	Liu, Hongxia, Liu, Tengteng (2022): Two new species of Bucculatrix Zeller from southeast China (Lepidoptera: Bucculatricidae). Zootaxa 5100 (1): 137-144, DOI: 10.11646/zootaxa.5100.1.8
