taxonID	type	description	language	source
039887D7FF81476FFF36FC7DFA3CE98D.taxon	diagnosis	The tristrigella species group (Fig. 1) can be diagnosed by the following combination of presumably apomorphic characters: 1. The vertex in males is medially covered with glossy golden scales. 2. The forewing fascia is narrow (0.03 ‒ 0.10 × FWL) and nearly straight. 3. The dark brown band of the forewing fascia extends continuously from the costa to the dorsum, while the yellow medial band is limited to the costal half of the wing. 4. The background forewing colour is light and glossy golden in the basal part of the forewing and darker, coppery bronze in the apical part of it. 5. A costal spot is present in the basal area of the forewing, usually matching its background colour; this spot is discernible only by a diffuse brown line bordering it dorsally. 6. The distal half of the forewing shows a characteristic pattern composed of several yellow spots surrounded by dark brown scales. This combination of pattern elements is unique to the tristrigella species group within Nemophora, although some features superficially resemble those seen in the kalshoveni species group from Indonesia and Papua New Guinea (Kozlov 2016).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF81476FFF36FC7DFA3CE98D.taxon	discussion	A tentative phylogeny of the tristrigella species group (Fig. 1) is proposed based on two presumably apomorphic characters: 7. The glossy golden coloration at the base of the forewing extends up to 0.4 × FWL. 8. Male compound eyes are enlarged, with an interocular index ranging from 1.15 to 1.75.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF824769FF36F994FD0EE904.taxon	description	(Figs. 2, 10, 14) LSID urn: lsid: zoobank. org: act: F 3 F 67963 - 25 CA- 467 B-B 4 E 4 - 50 F 4 CCA 49840	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF824769FF36F994FD0EE904.taxon	materials_examined	Holotype ♂: Malaysia, Selangor, Bukit Kutu (3 ° 32 ′ 34 ″ N, 101 ° 43 ′ 13 ″ E); labelled: 8 mm circle with red border, print ‘ Holo- │ type’; 13 × 19 mm, print + black ink ‘ MALAY PENIN: │ Selangor, Bukit Kutu │ 3.300 ft. │ 29 - 9 - 1932. │ H. M. Pendlebury. ’, reverse side: ‘ Ex Coll: │ F. M. S. │ Museum’; 9 × 16 mm, print ‘ B. M. │ Genitalia slide │ No. 29971 ’; 6 × 18 mm, print ‘ HOLOTYPE ♂ │ Nemophora │ pendleburyi Kozlov’ (NHM) [examined].	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF824769FF36F994FD0EE904.taxon	diagnosis	Diagnosis. Nemophora pendleburyi differs from other species of the tristrigella group by the relatively short (up to 0.17 × FWL) extension of glossy golden colour in the basal field of forewing. In both external features and male genitalia traits, N. pendleburyi is most similar to N. vitalii (Fig. 3), from which it differs by the small size, absence of distinct lobe on internal surface of valva, large medial process of transtilla, and short (less than half of juxta) arrow head.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF824769FF36F994FD0EE904.taxon	description	Description. Male (Fig. 2). FWL 5.4 mm, WLR 0.37. Vertex glossy golden; frons glossy silver to light glossy golden. PLB 0.7 × vertical eye diameter (0.85 × length of scape), with light grey appressed scales; base ventrally with few raised dark brown piliform scales. Proboscis light brown, base coppery brown. Eyes slightly enlarged; interocular index 0.7. Length of antenna unknown (tips broken). Scape and base of flagellum dark coppery brown. Tegulae glossy golden; thorax marginally bronze (medial part of dorsum in the single available specimen is abraded). Forewing (Fig. 10) bronze, with slight coppery iridescence; basal part (about 0.17 × FWL) glossy golden; costal spot at forewing base extends to 0.25 × FWL. Fascia dark brown, straight, narrow (0.10 × FWL at costa, 0.05 × FWL at dorsum); its inner margin reaches costa at 0.44 × FWL; costal part of fascia (up to 0.4 × forewing width) with pale yellow medial band. Distal part of forewing with five yellow spots bordered and slightly suffused with dark brown scales. Anterior spot long, shallowly C-shaped, starting from costa at 0.6 × FWL and approaching wing apex between veins RS 3 and RS 4; four smaller spots positioned between veins RS 4 and M 3. Fringe dark bronze near apex to bronze along termen. Hindwing brown; costal area grey; fringe grey. Legs glossy bronze; bases of all tarsomeres yellow. Epiphysis at 0.6, almost reaching apex of tibia. Abdomen light brown dorsally, light bronze ventrally. Female unknown. Male genitalia (Fig. 14). Tegumen dome-shaped, with distinct medial ridge. Socii 1.1 ‒ 1.2 × diameter of phallus. Vinculum 2.4 × length of valva, with straight lateral margins and nearly straight distal margin. Tips of valvae at about same level as tip of tegumen. Both ventral and dorsal margins of valva nearly straight; tip of valva narrowly rounded. Valvae fused basally up to 0.35 × total length; their internal margins distinct; base of fused valvae medially with minor indentation (0.01 ‒ 0.02 × length of valva). Anellus 0.3 × length of valva. Transtilla with large (long and wide) medial process, length of which exceeds diameter of phallus more than twice. Juxta 0.5 × length of phallus; arrow head moderately wide (WLR 0.55), with pointed tip and pointed lateral arms. Phallus of same length as vinculum, in lateral view shallowly S-shaped; distal quarter split into two lateral lobes of similar length and shape; base of phallus narrowly funnel-shaped.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF824769FF36F994FD0EE904.taxon	distribution	Distribution. Malaysia (Selangor).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF824769FF36F994FD0EE904.taxon	etymology	Etymology. Named in honour of Henry Maurice Pendlebury (1893 – 1945), a British entomologist, astute observer and keen naturalist, who assembled extensive insect collections during his expeditions in Malaysia and obtained, among other specimens, the holotype.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	description	(Figs. 3, 11, 15, 18) LSID urn: lsid: zoobank. org: act: 728026 F 7 - B 3 AC- 4 E 2 B-B 940 - 6 F 97 D 8066743	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	materials_examined	Holotype ♂: Brunei, Rampayon River (4 º 19 ′ S, 114 º 28 ′ E); labelled: 8 mm circle with red border, print ‘ Holo- │ type’; 7 × 12 mm, print ‘ Brunei, 300 ′ │ Rampayon R., LP 195, │ GR 960785. Lowland │ dipterocarp forest. │ 21. IX- 24. IX. 1992 ’; 4 × 10 mm, print ‘ G. S. Robinson │ Brunei / Malaysia │ Brit. Mus. 1993 - 2 ’; 9 × 16 mm, print ‘ B. M. | Genitalia slide │ No. 29464 ’; 6 × 18 mm, print ‘ HOLOTYPE ♂ │ Nemophora │ vitalii Kozlov’ (NHM) [examined]. Paratypes. 1 ♂, labelled: 8 mm circle with yellow border, print ‘ Para- │ type’; 11 × 17 mm, print ‘ BRUNEI: 200 ′ │ Labi, │ Lowland forest │ 28.11.1982 │ Alan Cassidy’; 4 × 15 mm, print ‘ G. S. Robinson │ BM 1982 - 156 ’; 11 × 14 mm, print ‘ Collected │ by day’; 6 × 18 mm, print ‘ PARATYPE ♂ │ Nemophora │ vitalii Kozlov’ (NHM) [examined]. 1 ♂, labelled: 8 mm circle with yellow border, print ‘ Para- │ type’; 9 × 16 mm, print + black ink ‘ SARAWAK │ Semengoh For. Res. │ 15 mi. So. Kuching │ 12. IX. 1966 ’; 3.5 × 17 mm, print ‘ J. F. B. Clarke │ Thelma M. Clarke’; 6 × 18 mm, print: ‘ PARATYPE ♂ │ Nemophora │ vitalii Kozlov’ (USNM) [examined]. 38 ♂, labelled: 10 × 17 mm, print + black ink ‘ E. Borneo 125 m │ Tabang [date from 31. VIII. to 29. IX.] 1956 │ Bengen River │ A. M. R. Wegner’; 6 × 14 mm, print: ‘ PARATYPE ♂ │ Nemophora │ vitalii Kozlov’ (RMNH) [examined].	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	diagnosis	Diagnosis. Nemophora vitalii differs from N. tristrigella (Figs. 7 ‒ 9) and N. chalcotechna (Figs. 4 ‒ 6) by the non-enlarged compound eyes in males, the presence of four yellow spots in the apical part of forewing margin, and by longer male antenna (4.5 ‒ 4.8 × FWL). It can be distinguished from N. pendleburyi by its larger size and twice wider (reaching 0.35 × FWL) glossy golden basal field of the forewing, small medial process of transtilla and the presence of a distinct lobe on the internal surface of the valva.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	description	Description. Male (Fig. 3). FWL 7.9 ‒ 9.2 mm, WLR 0.37 ‒ 0.39. Vertex medially glossy golden, its margins with dark brown piliform scales; frons glossy golden, with row of pale yellow piliform scales below antennal sockets. PLB 0.70 ‒ 0.90 × vertical eye diameter (0.75 ‒ 0.85 × length of scape), covered by pale yellow appressed scales; base with few protracted pale yellow piliform scales. Proboscis light brown, base laterally with dark brown scales. Eyes not enlarged; interocular index 0.55 ‒ 0.65. Antenna 4.5 ‒ 4.8 × FWL. Scape coppery bronze; flagellum proximally dark brown, distally light brown. Tegulae and thorax golden. Forewing base (up to 0.4 × FWL) glossy golden; costal spot at forewing base extends to 0.35 × FWL (Fig. 11). Fascia dark brown, straight, narrow (0.07 × FWL at costa, 0.03 × FWL at dorsum), slightly oblique; its inner margin reaches costa at 0.45 ‒ 0.46 × FWL; costal half of fascia with yellow medial band. Distal part of forewing dark bronze with coppery tint, with pattern consisting of four yellow spots bordered by dark brown scales. Anterior spot long, shallowly C-shaped, starts from costa at 0.59 ‒ 0.64 × FWL and approaches wing margin between veins RS 3 and RS 4. Three other spots much smaller, situated near outer wing margin between veins RS 4 and M 3. Fringe bronze. Hindwing brown, with slight coppery iridescence; costal area brownish grey; fringe light brown. Legs golden proximally to dark coppery brown distally; bases of all tarsomeres pale yellow. Epiphysis at 0.5, almost reaching apex of tibia. Abdomen light brown. Female unknown. Male genitalia (Figs. 15, 18). Tegumen dome-shaped, with distinct medial ridge. Socii 1.1 × diameter of phallus. Vinculum 2.4 × length of valva, with nearly straight lateral margins and shallowly concave distal margin. Tips of valvae slightly extend beyond tip of tegumen. Ventral valvar margin slightly concave; dorsal margin nearly straight; tip of valva rounded. Internal surface of valva bears small, broadly rounded lobe near its midpoint; viewed dorsoventrally, this lobe does not extend beyond ventral margin of valva. Valvae fused basally up to 0.35 × total length; base of fused valvae medially with minor indentation (0.01 ‒ 0.02 × length of valva). Anellus 0.45 × length of valva. Transtilla with small pointed medial process, length of which exceeds diameter of phallus less than twice. Juxta 0.35 × phallus; arrow head moderately wide (WLR 0.55), with pointed tip and pointed lateral arms. Phallus 1.1 × length of vinculum, in lateral view shallowly S-shaped; its tip consists of three lobes: left lobe spinosae, medial lobe of same length as left lobe, and right lobe slightly longer than medial and left lobes; base of phallus narrow, with almost parallel margins.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	distribution	Distribution. Indonesia (East Kalimantan), Malaysia (Sarawak), Brunei.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	biology_ecology	Biology. Day-flying species. In Brunei, two specimens were collected in primary lowland dipterocarp forest.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF844768FF36FB45FB51EAB3.taxon	etymology	Etymology. The species is named after my friend and colleague Vitali Zverev, who assisted me in the study of fairy moths and, in particular, recognized this species among the N. tristrigella accession materials.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	description	(Figs. 4 ‒ 6, 12, 16, 19)	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	materials_examined	Holotype ♂: Philippines, Mindanao, near Iligan (8 o 12 ′ N, 124 o 13 ′ E); labelled: 4 × 10 mm, red paper, print ‘ Holotypus’; 4.5 × 10 mm, print ‘ Momungan │ Mindanao’; 4 × 12 mm, print ‘ Staudinger & │ Bang-Haas dedit. ’; 5 × 10 mm, print ‘ 36 ’; 3 × 10 mm, print ‘ Meyrick det. ’; 5 × 52 mm, black ink ‘ 36. Nemotois chalcotechna n. sp. ’ [in Meyrick’s hand]; 4 × 10 mm, print ‘ Eberswalde │ coll. DEI’ (DEIE) [examined].	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	materials_examined	Other material. Philippines. 12 ♂ 1 ♀, Basilan Island, ii. ‒ iii. 1889 (Doherty) (NHM); 1 ♀, Sulu (Pryer) (NHM); 1 ♀, Mindanao, Lanao, Kolambugan, 16. vi. 1914 (Wileman) (NHM); 1 ♂, Mindanao, Surigao (Baker) (USNM).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	diagnosis	Diagnosis. Nemophora chalcotechna is closely related to N. tristrigella (Figs. 7 ‒ 9), from which differs by the shallowly C-shaped, oblique yellow spot positioned between 0.57 ‒ 0.59 × FWL at the costal margin and the apex of the forewing; a longer distance (0.10 ‒ 0.13 × FWL) between the external margin of the fascia’s yellow band and the internal margin of this spot; shorter male antenna (3.6 ‒ 3.7 × FWL) and a smaller arrow head of juxta (reaching less than half of the juxta’s total length).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	description	Description. Male (Figs. 4, 5). FWL 6.3 ‒ 7.4 mm, WLR 0.38 ‒ 0.44. Vertex covered by appressed glossy golden scales, with protracted tuft of dark brown piliform scales above antennal sockets. Frons glossy golden, with row of light brown piliform scales below antennal sockets. PLB 0.5 ‒ 0.6 × vertical eye diameter (0.75 ‒ 0.95 × length of scape), covered by pale yellow appressed scales; base with a few pale yellow piliform scales protracted anteroventrally. Proboscis light brown to ochreous. Eyes enlarged, but not touching each other, with rounded dorsal margins; interocular index 1.15 ‒ 1.75; occipital distance 0.25 ‒ 0.30. Antenna 3.6 ‒ 3.7 × FWL; pegs present. Scape coppery bronze; flagellum dark brown proximally to white distally. Tegulae and thorax golden. Forewing base (up to 0.4 × FWL) glossy golden; costal spot at forewing base extends to 0.35 × FWL (Fig. 12). Fascia dark brown, straight, narrow (0.07 × FWL at costa, 0.03 × FWL at dorsum), slightly oblique; internal margin of fascia reaches costa at 0.39 ‒ 0.47 × FWL; yellow medial band of fascia reaches 0.4 ‒ 0.5 × width of forewing. Distal part of forewing bronze with coppery iridescence, with three yellow spots surrounded by dark brown scales. Anterior spot long, shallowly C-shaped, starts from costa at 0.57 ‒ 0.59 × FWL and approaches wing apex between veins RS 3 and RS 4. Two smaller spots at outer wing margin are located between veins RS 4 and M 1 and between veins M 3 and CuA 1. Fringe bronze. Hindwing light brown to brown, with slight coppery iridescence; anal field semitranslucent; costal area brownish grey; fringe light brown to almost white. Legs golden proximally to dark coppery brown distally; bases of all tarsomeres pale yellow. Epiphysis at 0.5 ‒ 0.6, almost reaching apex of tibia. Abdomen light ochreous brown. Female (Fig. 6). FWL 5.5 mm, WLR 0.38. Otherwise similar to male. Male genitalia (Figs. 16, 19). Tegumen dome-shaped, with prominent medial ridge. Socii 1.5 × diameter of phallus. Vinculum 2.00 ‒ 2.05 × length of valva, with slightly convex lateral margins and Λ-shaped distal margin. Tips of valvae extend beyond tip of tegumen; valvae ventrally fused to vinculum (suture in medial part indistinct). Ventral margin of valva medially convex; dorsal margin with slight medial protrusion; tip of valva narrowly rounded. Valvae fused basally up to 0.4 × total length; their internal margins indistinct; fused part distally with minor medial indentation (0.01 ‒ 0.02 × length of valva). Anellus 0.5 × length of valva. Transtilla with small triangular medial process and extended lateral processes. Juxta 0.55 × length of phallus; arrow head moderately wide (WLR 0.55), with pointed tip and short pointed lateral arms; reaches less than half of juxta’s total length. Phallus of same length as vinculum, in lateral view shallowly sickle-shaped. Tip of phallus slightly wider than its medial part, with deep ventral incise and small dorsal indentation. Base of phallus developed into nearly rectangular platform perpendicular to main part of it; width of this platform about 3.5 × diameter of phallus.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	distribution	Distribution. Philippines (Basilan, Sulu, Mindanao).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF86476AFF36F926FB90EB98.taxon	discussion	Comments. Specimen no. 42159, collected by W. Doherty and preserved in the NHM collection, bears a label reading ‘ Chrysothauma │ basilanica │ Drnt. │ Type ♀ ’; however, Durrant never published a formal description of this species. In addition to 15 moth specimens, the NHM collection also includes an empty pin with the label ‘ Basilan │ PHILIPPINES │ II – III. 1889 │ Doherty 42171 ’, marked with a red hand-written note ‘ Slide’. The wings of this male specimen were mounted on a slide by J. H. Durrant in 1909. To facilitate access, the slide was assigned number 29978, and the label ‘ B. M. wing slide No. 29978 ’ was added to the pin.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF874764FF36F8B9FBC1EBC4.taxon	description	(Figs. 7 ‒ 9, 13, 17, 20)	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF874764FF36F8B9FBC1EBC4.taxon	materials_examined	Other material. Indonesia. 5 ♂ 3 ♀, Sumatra, Marang, vii. – ix. 1890 (Doherty) (NHM); 1 ♂, Sumatra, Padang, 3. ix. 1913 (Jacobson) (RMNH); 1 ♂, Sipura Island, 9. x. 1924 (Karny) (NHM); 1 ♂, Java, Kalipari, 1891 (Doherty) (NHM); 1 ♂, Java, Preanger, Mount Djampang, 1500 ‒ 2500 ft., ii. – iii. 1936 (Walsh) (NHM); 1 ♂, Java, Buitenzorg, Depok, 7. iii. 1941 (Toxopeus) (RMNH); 1 ♂, Java, Buitenzorg, 1894 (RMNH); 1 ♂, Java, Cibodas, 22. ix. 1929 (Lieftinck) (RMNH); 1 ♂, Java, Depok, 1886 (RMNH); 1 ♀, ibid., 1885 (RMNH); 1 ♀, ibid., 1883 (USNM); 1 ♂, Java, Jakarta, 1886 (RMNH); 18 ♂ 2 ♀, Bali, 1896 (Doherty) (NHM); 1 ♂, Borneo, Balikpapan, Wain River, xi. 1950 (Wegner) (RMNH); 1 ♂, Borneo, Gunungsari, 21. viii. 1956 (Wegner) (RMNH); 1 ♂, Kangean Archipelago, Petapan, 20. ix. 1954 (Hoogerwerf) (RMNH). Philippines. 1 ♂, Tawi-Tawi Island, 22. xi. 1961 (Noona Dan Expedition) (ZMUC).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF874764FF36F8B9FBC1EBC4.taxon	diagnosis	Diagnosis. Nemophora tristrigella is closely related to N. chalcotechna (Figs. 4 ‒ 6), from which differs by the shallowly S-shaped, oblique yellow spot positioned between 0.56 ‒ 0.62 × FWL at the costal margin and the apex of the forewing, which is sometimes split in two separate spots; a shorter distance (0.09 ‒ 0.10 × FWL) between the external margin of the fascia’s yellow band and the internal margin of this spot; longer male antenna (3.9 ‒ 4.1 × FWL) and a larger arrow head of juxta (exceeding half of the juxta’s total length).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF874764FF36F8B9FBC1EBC4.taxon	description	Description. Male (Figs. 7, 8). FWL 6.2 ‒ 7.7 mm, WLR 0.36 ‒ 0.40. Vertex glossy golden medially, bordered anteriorly and posteriorly by dark brown piliform scales. Frons glossy golden, bearing a few brown piliform scales below antennal sockets. PLB 0.6 × vertical eye diameter (1.05 ‒ 1.15 × length of scape), covered by light yellowish brown appressed scales. Proboscis light brown. Eyes enlarged, but not touching each other; interocular index 1.4 ‒ 1.6, occipital distance 0.15 ‒ 0.30. Antenna 3.9 ‒ 4.1 × FWL. Scape shining coppery bronze; 8 ‒ 12 basal flagellomeres dark brown, first 3 ‒ 5 of them thickened by raised dark coppery brown scales; distal part of flagellum silver grey. Tegulae and thorax golden. Forewing basally (up to 0.4 × FWL) glossy golden; costal spot at forewing base extends to 0.35 × FWL (Fig. 13). Fascia dark brown, straight, narrow (0.07 × FWL at costa, 0.05 × FWL at dorsum), slightly oblique; inner margin of fascia reaches costa at 0.39 ‒ 0.47 × FWL; costal half of fascia with yellow medial band. Distal part of forewing bronze with coppery iridescence, with two or three yellow spots surrounded by dark brown scales; long axes of these spots parallel to each other. Two of these spots, one touching costa at 0.56 ‒ 0.62 × FWL and another at wing apex, are connected by narrow band of dark brown scales sometimes including yellow line, forming S-shaped figure. Third yellow spot near termen clearly isolated from two other spots. Fringe gold to bronze apically to brown with coppery iridescence basally. Hindwing brown, with slight coppery iridescence; costal area grey; fringe brown. Legs golden proximally to dark coppery brown distally; bases of all tarsomeres pale yellow. Epiphysis at 0.5, reaching (or almost reaching) apex of tibia. Abdomen light brown. Female (Fig. 9). FWL 6.0 ‒ 6.3 mm, wider than in male: WLR 0.42 ‒ 0.46. Antenna 1.5 ‒ 1.8 × FWL; base not thickened. Abdomen brown dorsally, gold to coppery ventrally. Otherwise similar to male. Male genitalia (Figs. 17, 20). Tegumen wide, dome-shaped, with distinct medial ridge. Socii 1.3 × diameter of phallus. Vinculum 1.8 ‒ 2.2 × length of valva, with slightly convex lateral margins and shallowly W-shaped distal margin. Tips of valvae extend beyond tip of tegumen. Ventral margin of valva medially with prominent lobe; dorsal margin with slight protrusion in the middle; tip of valva narrowly rounded. Valvae fused basally up to 0.4 × total length; their internal margins indistinct; base of fused valvae medially with deep, narrow indentation (0.05 ‒ 0.07 × length of valva). Anellus 0.4 × length of valva. Transtilla with short triangular medial process. Juxta 0.6 × length of phallus; arrow head wide (WLR 0.6), with pointed tip and pointed lateral arms; it exceeds half of juxta’s total length. Phallus 1.0 ‒ 1.1 × length of vinculum, in lateral view shallowly S-shaped. Tip of phallus slightly wider than its medial part, with deep ventral incision and small dorsal indentation; base of phallus narrowly funnel-shaped.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF874764FF36F8B9FBC1EBC4.taxon	distribution	Distribution. Indonesia (Sumatra, Sipora, Java, Bali, Borneo, Kangean), Philippines (Tawa-Tawa).	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
039887D7FF874764FF36F8B9FBC1EBC4.taxon	discussion	Comments. Although A. Diakonoff misidentified one specimen of N. chalcotechna from Mindanao (housed in NHM) as N. tristrigella, his description of N. tristrigella (Diakonoff 1951) is accurate.	en	Kozlov, Mikhail V. (2025): A taxonomic revision of the tristrigella species group of the genus Nemophora Hoffmannsegg (Lepidoptera, Adelidae) from the Philippines, Malaysia, Brunei and Indonesia. Zootaxa 5665 (1): 99-110, DOI: 10.11646/zootaxa.5665.1.6, URL: https://doi.org/10.11646/zootaxa.5665.1.6
