taxonID	type	description	language	source
F77E87938806FF92FF2CFB7AF485FAB9.taxon	description	(Figs 1 – 4, 13)	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938806FF92FF2CFB7AF485FAB9.taxon	materials_examined	Material examined: Holotype (ZSI) ♀ mature larva, INDIA, Nagaland, Kohima district, Dzuleke village, Dzulerudi River, 25.61643 ° N, 93.93918 ° E, Alt. 1680 m. 20. VIII. 2022, Coll. T. Kubendran (Reg. No. I / E / 875). Paratypes. 15 larvae, same data as holotype (Reg. No. I / E / 876).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938806FF92FF2CFB7AF485FAB9.taxon	description	Mature larva (Fig. 1 A – C). Body length: 3.5 – 3.7 mm; cerci length 1.4 – 1.8 mm; paracercus length 0.9 – 1.2 mm; antenna 0.6 – 0.8 mm. Coloration (Figs 1 A – C): Head brown, medially with yellow pattern; clypeus yellow; pronontum pale yellow with brown pattern; anterior margin of mesonotum with dark brown streak, posterior half of mesonotum yellow. Abdominal terga I – II brown; terga III – VI pale yellow with brown pattern; terga VII – VIII brown with pale yellow mark medially; terga IX – X pale yellow. Thorax ventrally pale yellow, legs pale yellow with brown marks; femur pale yellow, brown medially and apically; claws distally brown. Abdominal sterna pale yellow, laterally and medially pale brown. Cerci pale yellow. Head. Antenna (Fig. 1 B): Scape and pedicel sub-cylindrical, flagellum with thin, small stout setae at apex of each segment. Labrum (Fig. 2 A): Rounded with length 0.7 × maximum width. Medial emargination of distal margin deeply cleft, with apically blunt process. Dorsally with numerous fine, simple setae; submarginal arc of 1 + 5 simple setae; anterolateral margin slightly rounded. Distal margin with row of long, feathered setae. Ventral surface with four short, spine-like setae laterally. Hypopharynx (Fig. 2 B): Lingua slightly rounded laterally and as long as superlingua. Superlingua rectangular, with numerous thin small setae along distal margin. Right mandible (Fig. 2 C): Outer and inner incisors with 3 + 4 denticles respectively. Prostheca slender, with numerous setae distolaterally, and without minute intermediate denticles, mola with small bunch of setae. Margin between prostheca and mola without setae or crenelation. Tuft of two setae at apex of mola present. Left mandible (Fig. 2 D): Outer and inner incisors with 3 + 4 denticles respectively. Prostheca robust, apically with small stout denticles and comb-shape structure. Margin between prostheca and mola almost straight, without setae. Denticles of mola apically constricted. Tuft of setae present at apex of mola. Both mandibles with lateral margins almost straight; basal half with fine, simple setae scattered over dorsal surface. Maxilla (Figs 2 E, F): Galea-lacinia with two simple setae under crown. Inner dorsal row of setae with three denti-setae, distal denti-seta tooth-like, middle denti-seta slender, and pectinate, proximal denti-seta slender, trifid and pectinate furcation. Medially with a feathered, spine-like setae and 3 – 5 long, simple setae. Maxillary palp 1.7 × as long as length of galea-lacinia. Fine simple setae scattered over surface of segments I and II. Apex of segment II rounded without nipple. Labium (Fig. 3 A): Glossae shorter than paraglossae; inner margin of glossae with 8 long, spine-like setae. Apex with 5 long, robust setae and a medium, robust seta; outer margin with 4 spine-like setae. Paraglossae slightly curved inward; apex slightly rounded with three rows of long robust apically pectinate setae and few simple setae in antero-medial area. Dorsally with a row of long spine-like setae near inner margin. Labial palp 3 - segmented; segment I slightly longer than segments II and III combined. Segment II slightly produced inward to form a moderately expanded lobe at distal corner; dorsally with a row of 4 fine, simple setae; segment III conical and small tip at apex, slightly asymmetrical with a small concavity at inner apex; covered with short, spine-like setae. Segments II and III with fine simple setae scattered over dorsal surface. Thorax. Hind wing pads (Fig. 4 F): Present. Foreleg (Figs 3 B – E): Ratio of foreleg segments (femur: tibia: tarsi: claw) 1: 0.9: 0.6: 0.2. Femur length 2.7 × maximum width. Dorsal margin with a row of 24 – 25 long, stout, spatulate 2 - channel setae; length of setae 0.18 × maximum width of femur. Lateral surface with 5 – 6 stout 2 - channel setae. Apex of femur rounded with a row of short, stout, pointed setae, 5 stout lanceolate 2 - channel setae on lateral surface. Villopore well developed. Dorsal margin of tibia with stout, clavate setae; ventral margin with a row of 8 – 10 spine-like setae; lateral surface with stout, short, spatulate setae along patello-tibial suture. Dorsal margin of tarsus with hair – like setae; ventral margin with stout setae increasing in length towards apex. Claw with a row of 12 – 13 denticles (Fig. 3 E). Middle leg (Figs 3 F – J): Dorsal margin with a row of 18 – 20 long, stout, apically rounded 2 - channel setae; length of setae 0.18 × maximum width of femur. Lateral surface of femur with numerous stout, clavate 2 - channel setae. Dorsal margin of tibia with stout, clavate setae and inner margin with spine-like stout setae. Lateral surface of tibia with stout, short, spatulate 2 - channel setae along patello-tibial suture. Tarsi and claw similar to foreleg. Hind leg similar to middle leg (4 A – C). Abdomen (Fig. 4 G): Posterior margin of terga with a row of U-shaped long blunt spines, surface with scale bases and scattered fine, simple setae. Gills (Figs 4 D – E): Single lamellate gills present on segments I – VII. Margin serrated with fine, simple setae; transparent poorly visible tracheation, dorsal surface with micropores. Paraproct (Fig. 4 H): Distally not expanded, with 15 – 16 marginal stout spines. Surface with scattered micropores and fine simple setae, and with small notched scales. Cercotractor with medium, marginal spines. Imago: Unknown.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938806FF92FF2CFB7AF485FAB9.taxon	etymology	Etymology: The specific epithet dzulekensis is a Latinized adjective formed from the toponym Dzuleke. In the local Angami language, a major tribal language in Nagaland, “ Dzu ” means water and “ leke ” means underground. Thus, the name Dzuleke reflects the unique hydrological feature of the stream in this region as it flows underground at one point in its course.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938806FF92FF2CFB7AF485FAB9.taxon	distribution	Distribution: Nagaland, India (Fig. 13).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938806FF92FF2CFB7AF485FAB9.taxon	diagnosis	Diagnosis: Baetis (T.) dzulekensis Vasanth, Kubendran, Subramanian & Gattolliat sp. nov. can be distinguished from all known species of the subgenus Tenuibaetis by the following combination of characters: (i) labrum rounded, dorsal submarginal arc of setae composed with 1 + 5 simple setae (Fig. 2 A); (ii) right mandible: canine with 3 + 4 denticles (Fig. 2 C); (iii) maxillary palp much longer than galea-lacinia; (Figs 2 E – F); (iv) paraglossae with 3 – 4 long setae on dorsal surface, labial palp segment II slightly produced apicolaterally (Fig. 3 A); (v) dorsal margin of forefemora with 24 – 25 long, stout, spatulate 2 - channel setae (Fig. 3 B); (vi) dorsal surface of all tibia with stout, apically rounded setae (Figs 3 J, 4 B); (vii) claw with a row of 12 – 13 denticles (Figs 3 E, 4 C); (viii) posterior half of mesonotum without any distinct marking (Figs 1 A – C); (ix) tracheation of gills transparent (Figs 4 D – E).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938806FF92FF2CFB7AF485FAB9.taxon	biology_ecology	Ecology: The riverbed composition is as follows: Gravel 5 %, Cobbles 30 %, Boulders 35 %, Bed rock 5 %, Fine sand 15 % and Slit 5 %. In summer, the Dzulerudi River is 3 – 3.5 m wide and 22 – 25 cm depth and medium water current (0.6 m / sec.), temperature (atmosphere) 21 ° C, temperature (water) 18.1 ° C, humidity 40 % and pH 6.6. This stream is located in the eastern part of the Himalayas at an altitude of around 1700 m. Larvae of the Baetis (T.) dzulekensis were collected from the stony bottom along the edges of the Dzulerudi River.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	description	(Figs 5 – 8, 13)	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	materials_examined	Material examined: Holotype (ZSI). ♀ mature larva, INDIA, West Bengal, Jhargram district, Belpahari range, grassland nearby Khandarani lake, 22.66543 ° N 86.70812 ° E, Alt. 173 m. 17. X. 2022, Coll. T. Kubendran (Reg. No. I / E / 877). Paratypes. 30 larvae, same data as holotype (Reg. No. I / E / 878).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	description	Mature larva (Figs 5 A – C). Body length: 3.7 – 3.8 mm; cerci length 1.8 – 2.0 mm; paracercus length 1.4 – 1.5 mm; antenna 0.7 – 0.9 mm. Coloration (Figs 5 A – C): Head brown, medially with pale yellow pattern; clypeus pale yellow; pronotum brown; anterior margin of mesonotum dark brown, posterior half of mesonotum yellowish. Abdominal terga I – III brown with reduced pale yellow pattern; terga IV – V pale yellow with brown pattern medially, terga VI – VIII brown and IX – X pale yellow with brown pattern. Cerci pale brown; thorax ventrally pale yellow, legs pale yellow with brown marks; femur pale yellow with brown marks, distally brown; claws distally brown; abdominal sternum pale yellow. Head. Antenna (Fig. 7 C): Scape and pedicel sub-cylindrical, flagellum with thin small stout setae on apex of each segment. Labrum (Fig. 6 A): Rounded with length 0.5 × maximum width. Medial emargination of distal margin deeply cleft, with apically blunt process. Dorsally with numerous fine, simple setae; submarginal arc of setae of 1 + 6 simple setae. Distal margin with row of long, bifid, pectinate setae. Ventral surface with four short, spine-like setae near lateral and anterolateral margin. Hypopharynx (Fig. 6 B): Lingua slightly rounded, as long as superlingua. Superlingua rectangular, with numerous thin small setae along distal margin. Right mandible (Fig. 6 C): Incisors fused. Outer and inner incisors with 3 + 4 denticles respectively. Prostheca slender, with numerous setae distolaterally, and without minute intermediate denticles, mola with small bunch of setae. Margin between prostheca and mola without setae or crenelation. Tuft of two setae at apex of mola present. Left mandible (Figs 6 D – E): Incisors fused. Outer and inner incisors with 4 + 4 denticles. Prostheca robust, apically with small stout denticles and comb-shape structure. Margin between prostheca and mola almost straight, without setae. Denticles of mola apically constricted. Tuft of setae at apex of mola. Both mandibles with lateral margins almost straight; basal half with fine, simple setae scattered over dorsal surface. Maxilla (Figs 6 F – G): Galea-lacinia with two simple setae under crown. Inner dorsal row of setae with three denti-setae, distal denti-seta tooth-like, middle denti-seta slender, and pectinate, proximal denti-seta slender, and pectinate, furcation well developed and abducted. Medially with two feathered, spine-like seta and 5 – 6 long, simple setae. Maxillary palp 1.5 × as long as length of galea-lacinia. Palp segment II 0.9 × length of segment I; segment II enlarged. Fine simple setae scattered over surface of segments I and II. Apex of segment II rounded without nipple. Labium (Fig. 7 A – B): Glossae shorter than paraglossae; inner margin of glossae with 8 long, spine-like setae; apex with 5 long, robust setae and a medium robust seta; outer margin with 4 spine-like setae, base with simple setae. Paraglossae subrectangular slightly curved inward; apex slightly rounded with three rows of long robust distally pectinate setae in apical area and few simple setae in antero-medial area. Dorsally with a row of long spine-like setae near inner margin. Labial palp 3 - segmented; segment I slightly longer than segments II and III combined. Segment II slightly produced inward to form a moderately expanded lobe at distal corner; dorsally with a row of 5 fine, simple setae; segment III conical with small tip at apex, slightly asymmetrical with a small concavity at inner apex; covered with short stout spine-like setae. Segments II and III with fine simple setae scattered over dorsal surface. Thorax. Hind wing pads (Fig. 8 D): Present. Foreleg (Figs 7 D – G): Ratio of foreleg segments (femur: tibia: tarsi: claw) 1.1: 0.9: 0.7: 0.2. Femur length 2.9 × maximum width. Dorsal margin with a row of 20 – 21 long, stout, apically rounded 2 - channel setae; length of setae 0.21 × maximum width of femur. Lateral surface with 4 stout setae. Apex rounded with a row of short, stout, pointed setae. Villopore well developed. Dorsal margin of tibia with a row of 8 – 12 short spine-like setae and tuft of long, fine, simple setae; lateral surface with scattered short, stout setae along patella-tibial suture. Dorsal margin of tarsus with hair-like setae; ventral margin with stout, spine-like setae increasing in length towards apex. Claw with a row of 10 – 11 denticles (Fig. 8 C). Middle leg (Fig. 8 A): Dorsal margin of femora with a row of 18 – 19 long, stout, apically rounded setae; length of setae 0.18 × maximum width of femur. Dorsal surface of femur with stout, spatulate setae and distally with more than 7 stout setae. Dorsal margin of tibia with stout, spatulate short setae and inner margin with spine-like stout setae and lateral surface spatulate stout setae along patella-tibial suture. Dorsal margin of tarsi bare; ventral margin with 6 – 7 stout setae increasing in length towards apex, apex with one short, stout, spine-like setae. Hind leg (Fig. 8 B): Dorsal margin of femora with a row of 19 – 20 long, stout, apically rounded setae; length of setae 0.19 × maximum width of femur. Dorsal surface of femur with few, clavate setae and distally without setae. Dorsal margin of tibia with numerous stout, spatulate short setae and inner margin with spine-like stout setae. Lateral surface of tibia with stout, spatulate setae along patella-tibial suture. Dorsal margin of tarsi with 6 stout short setae. Abdomen. Terga (Fig 8 E). Posterior margin of terga with regular row of broad short blunt U-shaped denticles, surface with scale bases and scattered fine, simple setae. Gills (Figs 8 F – I): Single lamellate gills present on segments I – VII. Margin serrated with fine, simple setae. Tracheation transparent, dorsal surface with small micropores. Paraproct (Fig. 8 J): Distally not expanded, with 9 – 10 marginal stout spines. Surface scattered with micropores and fine simple setae, with notched scales. Cercotractor with apically minute marginal spines. Imago: Unknown.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	etymology	Etymology: The specific epithet jhargramensis is a Latinized adjective formed from the type locality.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	distribution	Distribution: West Bengal, India (Fig. 13).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	diagnosis	Diagnosis: Baetis (T.) jhargramensis Vasanth, Kubendran, Subramanian & Gattolliat sp. nov. can be distinguished from all known species of the subgenus Tenuibaetis by the following combination of characters: (i) submarginal arc of labrum with 1 + 6 simple setae (Fig. 6 A); (ii) maxillary palp segment II enlarged (Figs 6 F – G); (iii) lateral surface of forefemur with 4 stout setae (Figs 7 D – G); (iv) dorsal margin of forefemur with 20 – 21 long, stout, apically rounded 2 - channel setae (Fig. 7 D); (v) claw with a row of 10 – 11 denticles (Fig. 8 C); (vi) tergum IV – V pale yellow with brown medially, tergum IX pale yellow (Fig. 5 A); (vii) posterior margin of tergum I – X with broad ‘ U’ shaped denticles (Fig. 8 E); (viii) gills I – VII with serrated margins, tracheation not visible and with small pores (Figs 8 F – I).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E87938801FF9FFF2CFA4DF182FA95.taxon	biology_ecology	Ecology: The type locality of the new species is a small stream near Khandarani Lake, located near the Belpahari forest range office in Jhargram district, West Bengal. The stream bed is predominantly composed of silt particles, fine sand, and some pebbles. The environmental parameters are temperature (atmosphere) 25 ° C, temperature (water) 21.1 ° C, humidity 45 % and pH 6.2. Larvae of the new species were collected from leaf litter and small pebbles on the bottom of stream.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	description	(Figs 9 – 12, 13)	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	materials_examined	Material examined: Holotype (ZSI) male mature larva, INDIA, Jammu & Kashmir, Reasi district, Chenab River, 33.072 11 N 74.834 46 E, Alt. 420 m. 18. XI. 2018, Coll. T. Kubendran (Reg. No. I / E / 879). Paratypes. 7 larvae, same data as holotype (Reg. No. I / E / 880).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	description	Mature larva (Figs 9 A – C). Body length: 3.4 – 3.7 mm; cerci length 2.0 – 2.5 mm; paracercus length 1.3 – 1.5 mm. Antennae much longer than head capsule. Coloration (Figs 9 A – C): Head brown, medially with yellow pattern; clypeus pale with brown; pronotum, mesonotum brown with a yellow band distally; abdominal terga brown; except tergum IV yellow; terga V – VII posterior margin dark brown; IX – X yellow; cerci pale yellow; thorax ventrally pale yellow, legs pale yellow with brown; femur dorsally pale yellow and light brown apically; claws distally reddish brown and sternum pale brown except sterna IX – X yellow. Head. Antenna (Fig. 12 J): Scape and pedicel sub-cylindrical, flagellum long with thin small stout setae at apex of each segment. Labrum (Figs 10 A – B): Rounded with length 0.6 × maximum width. Medial emargination of distal margin deep cleft, with apically pointed process. Dorsally with abundant medium, fine, simple setae dispersed from medial to basal area; submarginal arc of 1 + 7 simple setae. Ventral marginal row of setae composed with long, feathered setae laterally and anterolaterally, and long, bifid, pectinate setae medially; ventral surface with two short, spine-like setae near lateral and anterolateral margin. Hypopharynx (Fig. 10 C): Broad, lingua laterally rounded and as long as superlingua. Lingua longer than broad, distal half not expanded. Superlingua rectangular, lateral margin rounded with thin small setae along distal margin. Right mandible (Fig. 10 D): Incisors fused. Outer and inner incisors with 3 + 4 denticles respectively. Prostheca slender and distolaterally denticulate. Margin between prostheca and mola without setae or crenelation. Single seta at apex of mola present. Left mandible (Fig. 10 E): Incisors fused with distinct denticles. Outer and inner incisors with 4 and 3 denticles respectively. Prostheca robust, apically with small stout denticles and comb-shape structure. Margin between prostheca and mola almost straight. Tuft of two setae at apex of mola present. Both mandibles with lateral margin almost straight; basal half with fine, simple setae scattered over dorsal surface. Maxilla (Figs 10 F – G): Galea-lacinia with two simple setae under crown. Inner dorsal row of setae with three denti-setae, distal denti-seta tooth-like with small stout setae, middle denti-seta slender, trifid and pectinate, proximal denti-seta slender, trifid and pectinate furcation well developed and abducted. Medially with two feathered, spine-like seta and 5 – 6 long, simple setae. Maxillary palp 1.4 × as long as length of galea-lacinia; two segmented. Palp segment II 1.3 × length of segment I. Fine, simple setae, scattered over surface of segments I and II. Second half of segment II enlarged; apex almost rounded without nipple and without excavation at inner distolateral margin. Labium (Figs 11 A – C): Glossae shorter than paraglossae; inner margin of glossae with 9 – 10 long spine-like setae, apex with 4 long, robust, spatulate setae and a medium, robust seta; outer margin with 3 spine-like setae, base with simple setae. Paraglossae subrectangular slightly curved inward; apex rounded with three rows of long robust distally pectinate setae in apical area and few simple setae in antero-medial area. Dorsally with a row of long spine-like setae near inner margin. Labial palp 3 - segmented; segment I longer than segments II and III combined. Segment II slightly produced inward to form a moderately expanded lobe at distal corner; dorsally with a row of 5 – 6 fine medium simple setae; segment III conical with small tip at apex, slightly asymmetrical with a small concavity at inner apex; covered with short stout spine-like setae. Segments II and III with fine simple setae scattered over dorsal surface. Thorax. Hind wing pads (Fig. 12 H): Present. Foreleg (Figs 11 D – H): Ratio of foreleg segments (femur: tibia: tarsi: claw) 1: 0.8: 0.6: 0.2. Femur length 2.7 × maximum width. Dorsal margin with a row of 22 – 23 long, stout, apically rounded 2 - channel setae; length of setae 0.16 × maximum width of femur. Apex rounded with few minute setae. Lateral surface of femur with 5 stout setae. Villopore well developed. Dorsal margin of tibia with numerous spatulate 2 - channel setae; lateral margin of tibia with row of numerous small stout and hair-like setae along patella-tibial suture. Dorsal margin of tarsus with a row of small, 2 - channel setae in proximal half with hair-like setae; ventral margin with 7 – 9 stout spine-like setae increasing in length towards apex. Claw with a row of 12 denticles. Middle leg (Fig. 12 A – E): Dorsal margin with a row of 15 – 16 long, stout, apically rounded setae; length of setae 0.16 × maximum width of femur. Dorsal margin of tibia with numerous stout spatulate setae. Lateral surface of tibia with stout setae, and spine-like setae along patella-tibial suture. Dorsal surface of tarsi with 5 stout setae; ventral margin with 9 – 10 stout setae, apex with one short, stout, spine-like seta. Hind leg (Fig. 12 F): Dorsal margin with a row of 12 – 13 long, stout, apically rounded setae; length of setae 0.14 × maximum width of femur. Lateral surface of tibia 25 – 28 clavate setae and distally without setae. Dorsal margin of tarsi with 6 – 7 stout setae; lateral margin of tibia with numerous stout, spatulate setae and inner margin with spine-like stout setae. Dorsal surface of tibia with stout setae and spine-like setae. Abdomen. Terga (Fig. 12 K) surface with regular row of V-shaped scale bases and scattered fine, simple setae; distal margin with blunt, triangular spines. Gills (Fig. 12 G): Single lamellate gills present on segments I – VII. Margin with small denticles with intercalating fine, simple setae. Tracheation transparent and dorsal surface with micropore. Paraproct (Fig. 12 I): Distally not expanded, with 8 – 9 blunt marginal stout spines. Surface with scattered micropores and fine simple setae, with more round patches with small setae and patch of notched scales. Cercotractor with small, marginal spines. Imago: Unknown.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	etymology	Etymology: The specific epithet reasiensis is a Latinized adjective formed from the type locality.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	distribution	Distribution: Jammu & Kashmir (North Western Himalaya), India (Fig. 13).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	diagnosis	Diagnosis: Baetis (T.) reasiensis Vasanth, Kubendran, Subramanian & Gattolliat sp. nov. can be distinguished from all known species of the subgenus Tenuibaetis by the following combination of characters: (i) Antennae much longer than head capsule (Fig. 9 C); (ii) labrum with dorsal submarginal arc of 1 + 7 simple setae (Figs 10 A – B); (iii) right mandible with outer and inner incisors with 3 + 4 denticles (Fig. 10 D); (iv) maxillary palp slightly longer than galea-lacinia, segment II long, apically broad and rounded (Figs 10 F – G); (v) segment II of labial palp with a moderately expanded lobe distomedially (Figs 11 A – B); (vi) lateral surface of forefemur with 5 stout setae (Fig. 11 G); (vii) dorsal margin of forefemur with row of 22 – 23 long, stout, apically rounded 2 - channel setae (Fig. 11 D); (viii) dorsal surface of all tibia with stout, clavate setae (Figs 11 F, 12 C); (ix) mesothorax with yellow band distally (Fig. 9 A); (x) claw with a row of 12 denticles (Fig. 11 H).	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
F77E8793880CFF85FF2CFA1AF493FB91.taxon	biology_ecology	Ecology: The type locality of the new species is the Chenab River, Reasi district, Jammu & Kashmir. The riverbed composition is as follows: cobbles 40 %, boulders 25 %, fine sand 25 % and slit 10 %. The Chenab Riverine is 4 – 4.5 m wide and 35 – 45 cm depth and medium water current (0.5 m / sec.), temperature (atmosphere) 20.6 ° C, temperature (water) 17.5 ° C, humidity 56 % and pH 6.6. This stream is located in the Western Himalayas. Larvae of the new species were collected from the stony bottom along the edges of the Chenab River.	en	Vasanth, M., Kubendran, T., Subramanian, K. A., Gattolliat, J-L., Banerjee, Dhriti (2025): Three new species of the subgenus Tenuibaetis Kang & Yang, 1994 (Ephemeroptera: Baetidae) from India. Zootaxa 5665 (3): 374-396, DOI: 10.11646/zootaxa.5665.3.4, URL: https://doi.org/10.11646/zootaxa.5665.3.4
