taxonID	type	description	language	source
03DC8794FFACD673FF3CFF76C6B0285F.taxon	description	Figs. 1 A – B; 2 A – B; 3 E – H; 4 A – D; 5 A – H; 6 A – B, E – F, I – J; 7 A – B	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	materials_examined	Type locality. China, Yunnan Province, Honghe Prefecture, Lvchun County, Pinghe Town. Type material. Holotype, male (NACRC: IOZ (E) 211512), China, Yunnan Province, Honghe Prefecture, Lvchun County, Pinghe Town, 22 ° 49 ’ 10 ” N, 102 ° 31 ’ 26 ” E, 8. VI. 2024, 1316 m, local collector leg. Paratype, 1 male (CXTZ), China, Yunnan Province, Honghe Prefecture, Jinping county, Ma’andi Township, Sitai Mountain, 22 ° 45 ’ 24 ” N, 103 ° 26 ’ 21 ” E, 2400 m, 2. VI. 2023, local collector leg.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	description	Description of the holotype, male. Measurements. Body length (36.0 mm). Length of particular body parts: head (3.8 mm), mandible (8.2 mm), pronotum (7.0 mm), elytra (16.3 mm). Width: head (9.1 mm), pronotum (12.3 mm), elytra (12.3 mm). Habitus (Fig. 1 A – B). Head and pronotum black, elytra kermesinus, with slightly glossy; whole body with tiny and almost invisible pubescence, all legs with yellow setae on surface. Head transverse. Anterior ridge raised behind mandible and widely concave on the middle. Canthus long and wide, completely surround the eye. Clypeolabrum (Fig. 3 E) tiny and subtriangle, visible in dorsal view, fused with frons, apex sharp. Mandible (Fig. 3 E – F) about 2.2 times longer than head, inner smooth from base to teeth; in lateral view, almost horizontal, a dorsal tooth behind apex forming an approximately vertical right-angle and slightly protrudes beyond upper margin; in dorsal view, slightly curved, base thick, becomes thicker firstly and then thinner from base to teeth, with 2 continuous subtriangle inner teeth behind apex, proximal one smaller, apex of mandible sharp. Antennal club with 3 antennomeres; antennomeres 8 – 9 subquadrilateral; antennomere 10 semi-elliptic. Pronotum (Fig. 3 G) transverse, 1.8 times wider than long, markedly longer and wider than head with slightly raised edges. Anterior margin bisinuate, posterior margin slightly bisinuate. Anterior angles rounded and directed forwards, lateral angles obtuse and posterior angles blunt. Scutellum subtriangular, punctate, width almost as long as length. Legs. Protibia (Fig. 3 H) with 2 conspicuous sharp protuberances along outer margin, apex bifurcate with branches moderately sharp at tip. Mesotibia and metatibia straight and smooth at outer margin with a terminal spine. Elytra elongate, 1.3 times longer than wide, anterior margin significantly narrower than pronotum. Abdomen and aedeagus. Abdominal tergite VIII (Fig. 5 A) nearly semilune, lateral angles poorly defined. Abdominal ventrite VIII (Fig. 5 B) with 2 slightly protruding tips on basal margin near middle. Ventral plate of abdominal segment IX (Fig. 5 D) elongate without membranous stripe, basal part extremely narrow, then suddenly became wider, widens gradually to apex and constricted near apex. Aedeagus (Fig. 6 A, E, I) in dorsal view about 3.2 times longer than wide. Basal piece elongated, weakly longer than parameres in dorsal view, with a significant and relatively slender pair of sclerotized dorsal plates, and almost as wide as paramere; ventral plate at apical end of basal piece membranous. Paramere relatively narrow, with a small inner curvature at base, apex of paramere curved outward. Penis about 0.9 times length of paramere in ventral view. Flagellum long, about 1.6 times longer than aedeagus, apex of flagellum simple. Variation of paratype (n = 1). Mesodont (Fig. 2 A – B). Mandible 1.8 times longer than head (Fig. 4 A – B), shorter and straighter in dorsal view, dorsal tooth almost not protrudes beyond upper margin in lateral view, with 3 indistinct smaller inner teeth and a large blunt tooth at base. Protibia (Fig. 4 D) with 3 sharp protuberances along outer margin. Female. Unknown.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	diagnosis	Differential diagnosis. The new species is similar to N. fuscus Didier, 1926, N. brochieri Bomans & Miyashita, 1997, N. lehmanni Baba, 1995 in general appearance, but the following set of characters could help to identify precisely (Table 1, Table 2).	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	etymology	Etymology. This new species is named after the morphological features of its horizontal mandible when viewed in lateral view.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	distribution	Distribution. China (Yunnan).	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	biology_ecology	Biology. This species can be attracted to artificial light.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFACD673FF3CFF76C6B0285F.taxon	discussion	Remarks. Many species within the N. fuscus group exhibit individuals with elytra featuring prominent yellowish areas. Therefore, we hypothesize that similar individuals will also be found within the newly discovered species.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA7D67FFF3CF977C07B2881.taxon	description	Figs. 1 C – E; 2 C – D; 3 I – L; 4 E – H; 5 I – L; 6 C, G, K; 7 C; 8 A – J	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA7D67FFF3CF977C07B2881.taxon	materials_examined	Type locality. Vietnam, Tuyên Quang Province. Type material examined. None. Additional material examined. China: 2 males (CFYX), Guangxi Province, Guilin City, Ziyuan County, VI. 2021, You Xiao leg.; 2 males (CFYX), Guangxi Province, Nanning City, Wuming County, Tianping, 3. VI. 2023, local collector leg.; 1 male (CZHQ), Guangxi Province, Daming Mountain, VI. 2010, local collector leg.; 4 males (CZHQ), Guangxi Province, Daming Mountain, 2 – 8. VII. 2013, 1300 m, Yanquan Lu leg. Vietnam: 8 males (CXTZ), Yên Bái Province, 2023, local collector leg.; 18 males (CZHQ), Yên Bái Province, Yên Bái City, VI. 2024, local collector leg.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA7D67FFF3CF977C07B2881.taxon	description	Redescription of the male (n = 35). Body length: 29.2 – 57.1 mm (Fujita 2010; Toshiyuki 2021; Yi 2023 and present paper) Telodont. Habitus (Fig. 1 C – E). Head and pronotum black, elytra black or large areas yellowish; luster relatively matte; body with invisible pubescence in dorsal view, labium with dense setae, all legs with sparse yellow setae on surface. Head transverse. Anterior ridge raised behind mandible and widely concave on the middle. Canthus long and wide, completely surround the eye. Clypeolabrum (Fig. 3 I) almost invisible in dorsal view, fused with frons. Mandible (Fig. 3 I – J) smooth from base to teeth on inner margin; in lateral view, clearly up-curved, a dorsal tooth behind apex forming an approximately acute-angle and significantly protrudes beyond upper margin, and protrudes to almost same length as lower tooth; in dorsal view, slightly curved, thickness almost regular from base to inner teeth, with 4 – 7 continuous small teeth behind apex and getting smaller apically. Antennal club with 3 antennomeres; antennomeres 8 – 9 subquadrilateral; antennomere 10 semi-elliptic. Pronotum (Fig. 3 K) transverse, markedly longer and wider than head with slightly raised edges. Anterior margin bisinuate, posterior margin slightly bisinuate. Anterior angles relatively sharp and directed forwards, lateral angles and posterior angles obtuse. Elytra elongate, anterior margin obviously narrower than pronotum. Legs. Protibia (Fig. 3 L) with 2 – 3 conspicuous weakly sharp protuberances along outer margin, apex bifurcate with branches weakly sharp at tip, and base with a gap. Profemur (Fig. 3 L) with a semi-circular protrusion at apex. Mesotibia and metatibia straight and outer margin with a terminal spine, without external spines. Abdomen and aedeagus. Abdominal tergite VIII (Fig. 5 I) nearly semilune, lateral angles poorly defined. Abdominal ventrite VIII (Fig. 5 J) with 2 obvious protruding tips on basal margin near middle. Ventral plate of abdominal segment IX (Fig. 5 L) wide without membranous stripe, an ambiguous protrusion on both side near base, basal 2 / 3 almost equally wide, then widens towards apex, and gradually constricted near apex. Aedeagus (Fig. 6 C, G, K) with a large triangular pair of sclerotized dorsal plates and almost intersecting; ventral plate at apical end of basal piece with a sclerotized protruded part. Paramere wide, with relatively large inner curvature at base, apex of paramere curved outward. Penis about 0.65 times length of paramere in ventral view. Flagellum long, apex of flagellum simple. Variation. Mesodont. Mandible only weakly longer than head, with a bifurcated sharp large tooth at base and continuous small teeth, the largest one at about proximal 1 / 3. Amphiodont and priodont (Figs. 2 C – D; 8 A – B). Mandible weakly shorter than head with unclear consecutive small teeth on inner side, without branch at apex in lateral view; clypeolabrum (Figs. 4 E; 8 A) clearly visible in dorsal view.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA7D67FFF3CF977C07B2881.taxon	diagnosis	Differential diagnosis. See Table 1 and 2.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA7D67FFF3CF977C07B2881.taxon	distribution	Distribution. China (Guizhou, Guangxi, Yunnan); Vietnam (Lào Cai, Thái Nguyên, Tuyên Quang, Yên Bái) (Fujita 2010; Schenk 2012, 2014; Toshiyuki 2021; Yi 2023 and present paper).	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA7D67FFF3CF977C07B2881.taxon	discussion	Remarks. A notable feature observed is a gap at the base of the protibia, which can be folded to fit snugly into a semi-circular protrusion located at the apex of the profemur. In our examination of telodont males of N. fuscus from northern Vietnam and southern China, we found no discernible differences between the two populations in terms of external features or male genitalia. Furthermore, we inspected an ampriodont male (Fig. 8 A – J) from Nanning, Guangxi Province, China, which exhibited no external distinctions from the holotype of N. fuscus zhongguo (see fig. 1 in Schenk 2012). Besides, the distance and geographical conditions of the interconnected distribution areas do not present any significant isolation that would justify the differentiation of N. fuscus into subspecies. Therefore, we propose that N. fuscus zhongguo should be considered a new junior synonym of the nominate subspecies.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA2D678FF3CFAA0C25B2B0D.taxon	description	Figs. 1 F – H; 2 E – F; 3 M – P; 4 I – L; 5 M – P; 6 D, H, L; 7 D	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA2D678FF3CFAA0C25B2B0D.taxon	materials_examined	Type locality. Myanmar, Kachin State. Type material examined. None. Additional material examined. China: 2 males (CXTZ), Yunnan Province, Nujiang Prefecture, Gongshan County, Dulongjiang valley, 2011, local collector leg.; 1 male (CZHQ) ,, Yunnan Province, Nujiang Prefecture, Gongshan County, Dulongjiang valley, 19. VII. 2023, 1800 m, Feiyi Xin leg.; 15 males (CZHQ), Yunnan Province, Nujiang Prefecture, Lushui city, Pianma Township, VII. 2015, 2500 m, Xinxiong Deng leg.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA2D678FF3CFAA0C25B2B0D.taxon	description	Redescription of the male (n = 18). Body length: 29.4 – 48.1 mm (Fujita 2010; Toshiyuki 2021; Yi 2023 and present paper) Telodont. Habitus (Fig. 1 F – H). Head and pronotum black, elytra black or aurantiaceous with black borders; obviously glossy; body with invisible pubescence in dorsal view, labium with dense setae all legs with sparse yellow setae on surface. Head transverse. Anterior ridge raised behind mandible and widely concave on the middle. Canthus long and wide, completely surround the eye. Clypeolabrum (Fig. 3 M) tiny and transverse, slightly visible in dorsal view, fused with frons. Mandible (Fig. 3 M – N) smooth from base to teeth on inner margin; in lateral view, clearly up-curved and thinnest at basal 1 / 3, a dorsal tooth behind apex forming an approximately arc-shaped and weakly protrudes beyond upper margin; in dorsal view, slightly curved, thickness almost regular from base to inner teeth, with 2 – 3 continuous small teeth. Antennal club with 3 antennomeres; antennomeres 8 – 9 subquadrilateral; antennomere 10 semi-elliptic. Pronotum (Fig. 3 O) transverse, markedly longer and wider than head with slightly raised edges. Anterior margin bisinuate, posterior margin dimly bisinuate. Anterior angles blunt and directed forwards, lateral angles and posterior angles obtuse. Elytra elongate, anterior margin of elytra clearly narrower than pronotum. Legs. Protibia (Fig. 3 P) with 4 – 6 conspicuous sharp and short protuberances along outer margin, apex bifurcate with branches moderately sharp at tip; inner margin with a unclear gap at base. Mesotibia and metatibia straight and outer margin with a terminal spine, without external spines. Abdomen and aedeagus. Abdominal tergite VIII (Fig. 5 M) subsemi-circular, lateral angles poorly defined. Abdominal ventrite VIII (Fig. 5 N) with smooth basal margin. Ventral plate of abdominal segment IX (Fig. 5 P) slender without membranous stripe, obviously constricted at base, then widens sharply and significantly, widens gradually to about apical 1 / 5. Aedeagus (Fig. 6 D, H, L) with a significant and relatively slender pair of sclerotized dorsal plates; ventral plate at apical end of basal piece membranous. Paramere relatively narrow, with a obvious curvature at base, apex of paramere curved outward. Penis large, almost as long as paramere in ventral view. Flagellum long, apex of flagellum simple. Variation. Mesodont. Mandible shorter and straighter in dorsal view, with a rounded tooth at base. Amphiodont and priodont (Fig. 2 E – F). Mandible (Fig. 4 I – J) slender, straight and only slightly longer than head with unclear consecutive small teeth behind apex, with almost no branch at apex in lateral view; clypeolabrum (Fig. 4 I) clearly visible in dorsal view.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA2D678FF3CFAA0C25B2B0D.taxon	diagnosis	Differential diagnosis. See Table 1 and 2.	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
03DC8794FFA2D678FF3CFAA0C25B2B0D.taxon	distribution	Distribution. China (Yunnan); Myanmar (Kachin) (Fujita 2010; Schenk 2012, 2014; Toshiyuki 2021; Yi 2023 and present paper).	en	Xin, Fei-Yi, Zhong, Xiao-Tian, Guo, Wen-Chi, Zhang, Yi-Feng, Qi, Zhi-Hao, Wu, Song-Qing (2025): A taxonomic note on Chinese species of the Neolucanus fuscus group with the description of a new species (Coleoptera: Lucanidae: Lucaninae). Zootaxa 5570 (2): 344-360, DOI: 10.11646/zootaxa.5570.2.6, URL: https://doi.org/10.11646/zootaxa.5570.2.6
