508 research outputs found
Notacanthurus pange Vasanth, Selvakumar & Subramanian 2020, sp. nov.
No full textNotacanthurus pange Vasanth, Selvakumar & Subramanian sp. nov. (Figs 1–19) Material examined. Holotype: Ƌ larva, INDIA, Arunachal Pradesh, Lower Subansiri district, Talley Valley Wildlife Sanctuary, Pange, 27.5485 N, 93.89756 E, 1851 m, 18.vi.2017, colls. K. A. Subramanian & M. Vasanth (I/E- 440). Paratypes: 2 larvae, same data as holotype (I/E-441); 4 larvae, Arunachal Pradesh, Lower Subansiri district, Duskilo river, 27.62776 N, 93.8437 E, 1662 m, 16.vi.2017, colls. K. A. Subramanian & M. Vasanth (I/E-442); 3 larvae, Arunachal Pradesh, Dibang Valley, Talo river near Apai village, 28.10402 N, 96.10402 E, 1323 m, 29.x.2017, coll. K. A. Subramanian (I/E-443); 2 larvae, Sikkim, East Sikkim, Stream near Nathu La, 27.36718 N; 88.8400 E, 3856 m, 18.ix.2018, coll. K. A. Subramanian (I/E-444); 4 larvae, Meghalaya, East Jaintia hills, Daidung village, 25.33547 N, 92.61981 E, 1079 m, 12.iii.2016, coll. E. Eyarin Jehamalar. Description. Mature male larva: Body length 7.8 mm, length of caudal filaments 8.6 mm (Figs 1–2). Head: Head subquadrate, brown, with irregular pale yellow markings (Figs 1–2); anterior and lateral margins round; posterior margin concave; head width 3.4 mm, head length 1.3 mm; eyes black, antennae pale brown. Labrum with anterior portion straight and laterally curved; dorsally with dense hair-like setae (Fig. 4). Mandibles with scattered setae along molar area; incisor well developed; dense hair-like setae on anterolateral margin (Figs 6–7). Maxillae with 19–20 comb-like setae on crown, with scattered hair-like setae on ventral surface; outer margin of maxillary palp segment 2 and 3 with long hair-like setal field; terminal segment of maxillary palp with dense hairlike setae (Fig. 8). Hypopharynx: lingua apically broad and convex; superlinguae each with lateral arm developed, with dense row of hair-like setae (Fig. 5). Labium with wide U-shaped division of glossae; glossae subquadrangular; paraglossae expanded laterally; apical segment of each labial palp acutely pointed, dorsal surface with dense row of setae (Fig. 9). Thorax: Thorax brown with scattered brown markings around basal wing pads; pronotum extended laterally, a little wider than head (Fig 1–2), pronotum width 3.4 mm. Legs: Forefemora pale brown, with median pale yellowish maculae, scattered short simple stout setae on dorsal surfaces, apex of femora with blunt apical projection, with row of long setae on outer margin; fore tibiae subequal to femora in length, outer margin with few tiny and short setae at base, foretarsi 1/3 length of foretibiae (Figs 10–11). Mid and hind legs (Figs 12–13) similar to forelegs in color and setation; mid tibiae with dense setae on outer margin, tarsi 1/3 length of tibiae and hind tibiae with dense hair-like setae along the whole outer margin. Claws of all legs similar, with a large basal denticle and 2 subapical denticles (Fig. 14). Abdomen: Terga brown, with distinct oblique markings; terga I–IX each with single prominent median spine (Fig 1–2), with row of short bristles on posterior margin (Fig. 3). Sterna pale white; posterior end of sternum X with notched (Fig. 19). Gills on segment I–VII; Gills with both lamellae and fibrilliform portion on abdominal segments I–VI (Figs 15–18); gill VII with only lamellae; lamellae of gills I knife-shaped (Fig. 15); gills II–VI each with oval shape anteriorly; gills V–VI each with accessory lobe (Figs 17–18); gill VII narrower lanceolate, with fine hair-like marginal setae. Genitals: Protopenis (Fig. 19) male genitalia with simple, penis lobes fused, V shaped apically blunt with median pair of spine-like titillators subapically and mesally. Cerci about 1.2x length of body, each segment with whorls of minute bristles and without interfacing setae. Diagnosis: Notacanthurus pange sp. nov. can be distinguished from all known species of Notacanthurus by the following combination of characters: (i) gill lamellae V–VI with accessory lobe (Figs. 17–18); (ii) dorsal surface of femora with scattered short simple stout setae (Fig. 11); (iii) male genitalia having penis lobes fused, V shaped apically blunt with median pair of spine-like titillators subapically and mesally (Fig. 19); (iv) labrum with anterior portion straight and laterally curved (Fig. 4); and (v) lingua of hypopharynx apically broad and convex (Fig. 5). Notacanthurus pange sp. nov. can be accommodated in the recent global larval key to the species of Notacanthurus by Zhang et al. (2020). The second part of the 5 th couplet of that key can be modified and a new couplet should be added to include Notacanthurus pange sp. nov. as follows: 5. Abdominal terga with oblique stripes...................................................................... 7 - Abdominal terga without distinct markings................................................................. 6 6. Dorsal surface of femora with apically blunt scattered stout setae.................................. N. pange sp. nov. - Dorsal surface of femora with apically pointed stout setae.............................................. N. baekdu Imagos: Unknown. Etymology: The species named after the type locality, Pange, Lower Subansiri district, Arunachal Pradesh state, India. Habitat: The specimens were collected among cobbles from cold pristine hill streams between 1100-3860m. The riparian habitat ranged from subtropical broad leaved evergreen forests (Arunachal Pradesh and Meghalaya) to alpine meadows (Sikkim) (Fig. 20). Distribution: India (Arunachal Pradesh, Meghalaya and Sikkim) (Fig. 21).Published as part of Vasanth, M., Selvakumar, C., Subramanian, K. A., Sivaramakrishnan, K. G. & Sinha, Bikramjit, 2020, A new species of Notacanthurus Tshernova, 1974 (Ephemeroptera: Heptageniidae) from India, pp. 437-444 in Zootaxa 4894 (3) on pages 438-442, DOI: 10.11646/zootaxa.4894.3.9, http://zenodo.org/record/431597
Edmundsula meghamalaiensis Vasanth, Subramanian & Selvakumar 2021, n. sp.
No full textEdmundsula meghamalaiensis Vasanth, Subramanian & Selvakumar n. sp. (Figs 17–37) Material examined: Holotype: ♀ immature larva, INDIA, Tamil Nadu, Theni district, Suruli colony, Upper Manalar stream; 09.59167 N, 077.34261 E; Alt. 1530 m; 03.iii.2019, coll. M. Vasanth (Reg. No. I /E/433). Paratypes: 10 larvae (Reg. No. I /E/434), same data as holotype; 14 larvae, Kerala, Trivandrum district, Peppara Wildlife Sanctuary, Pandipath stream; 08.67741 N, 077.19390 E, Alt. 1326 m; 19.i.2019, coll. M. Vasanth (Reg. No. I /E/435). Mature larva. Length: body 8.5–9.0 mm; antennae 3.2–3.5 mm; cerci 6.5–7.0 mm; paracercus 7.2–7.5 mm. General coloration dark brownish yellow (Fig. 17). Head. Dark brown, washed with pale yellow. Upper portion of male compound eye reddish, lower portion black. Antennae white. Labrum (Figs 18–19): dorsum with two rows of thin, long setae; anterior region with a row of feather like setae ventrally; anteromedian emargination with moderate ‘V’ shaped cleft and without denticles. Hypopharynx (Fig. 20): lingua with well developed lateral process; anterior margin deeply cleft; superlingua with a row of setae on anterior margin. Mandibles: (Figs 21–22) translucent, with dark brown incisors and molars; lateral margins with scattered setae, inner incisor slightly longer than outer one. Maxilla (Fig. 23): segments I– III of palp equal in length, apical segment not tapering at apex. Labium (Figs 24–25): palps 3-segmented, segments II – III narrower, with row of thick setae on dorsal margin of third segment; outer and inner margins of palp with row of long and pointed setae; segment I slightly longer than segment II, segment III shorter than segment II, tapering at apex. Thorax. Pale yellowish brown, irregularly washed with dark brown; pronotum with lateral margins white; dark brownish with diffuse hypodermal markings. Legs: brownish yellow; coxae brown; outer surface of all femora with long, thick and thin setae; dorsal surface of foreleg with short stout setae as a group in the distal region; pale macula on distal end (Fig. 26); femur of midleg moderately developed with numerous short stout setae on dorsal surface (Fig. 27); dorsal surface of hindfemora with numerous short stout setae (Figs 28–29). Fore and mid tibia with thick feathered setae and long stout setae; hind tibia with thick feathered setae (Fig. 30). Claws with denticles, progressively larger from the middle, apical denticle much larger (Fig. 31). Abdomen. Terga I–X dark yellowish brown with diffuse hypodermal markings; terga I– VI with yellowish streaks laterally; terga IV–IX with posteriolateral spines, progressively larger posteriorly, spines on terga VII–IX pointed (Fig. 36). Gills on segments I–VII; gill I slender and lanceolate with branched tracheae; dorsal and ventral portions of lamellae of gills II –VII wider, long and smoothly tapered at apex (Figs 32–35). Subanal plate deeply cleft in male and female larva (Figs 36–37). Paracercus longer than cerci; caudal filaments with whorl of setae on alternate segments, setae shorter than length of corresponding segment. Adult. Unknown. Etymology. This species is named after the type locality, Meghamalai WLS, Theni District, Tamil Nadu, India. Distribution. Southern Western Ghats, India (Tamil Nadu and Kerala). Diagnosis. Edmundsula meghamalaiensis n. sp. can be distinguished from the previously described species, E. lotica Sivaramakrishnan 1985 by the following combination of larval characters: (i) anteromedian emargination of labrum with moderate ‘V’ shaped cleft and without denticles (Figs 18–19); (ii) segment I–III of maxillary palps shorter and apical segment not tapering at apex (Fig. 23); (iii) segment II–III of labial palp narrower and with a row of thick setae on the dorsal margin of third segment (Figs 24–25); (iv) distal region of dorsal surface of the foreleg with a group of short spines (Fig. 26). Habitat: Larvae of Edmundsula meghamalaiensis n. sp. inhabit first order (from 2–3 m wide) mountain stream (Manalar stream, 1530 m a.s.l.) of the Meghamalai Wildlife Sanctuary, Theni District, Tamil Nadu (Figs 58–59). The stream is characterized by medium water temperature (18–22°С at the time of sampling) and average current velocity. Larvae were collected from cobbles and pebbles where the new species was found with the larvae of the Baetis sp., Afronurus sp., Choroterpes sp. and Dudgeodes sp. Discussion: With an array of several plesiomorphic character states, Edmundsula is a genus of Gondwanian origin, presently the genus is endemic to southern peninsular India, which may have phylogenetic links with genera disjunctly distributed in Sri Lanka, Madagascar, South Africa and Australia. However, this requires in depth study through further exploration in respective areas. Furthermore, Sivaramakrishnan (1985) suggested a tenuous link of Edmundsula Sivaramakrishnan 1985 with Neozephlebia Penniket 1961 from New Zealand due to the dorsolateral expansion of the glossae in both the genera. Dense rows of setae on the outer margins of fore and middle legs in Edmundsula Sivaramakrishnan 1985 and in Indialis Peters & Edmunds 1970, another genus endemic to southern India apparently show relationship established the genus Sangpradubina from Thailand as pointed out by Boonsoong & Sartori (2016); Kluge (2020) recognized to given the morphological notes of femoral and tibial setation of genus Thraulodes Ulmer 1920 from Panama and Peru. These phylogenetic riddles can only be solved when combined morphological and molecular studies of both larval and respective alate stages of all these Gondwanan genera with intensified international collaboration.Published as part of Vasanth, M., Subramanian, K. A., Selvakumar, C., Kubendran, T. & Sivaramakrishnan, K. G., 2021, Three new species of Atalophlebiinae (Ephemeroptera: Leptophlebiidae) of India with a new record of the genus Megaglena Peters and Edmunds, 1970, pp. 56-70 in Zootaxa 5076 (1) on page 61, DOI: 10.11646/zootaxa.5076.1.7, http://zenodo.org/record/576332
Megaglena agasthiya Vasanth, Subramanian & Selvakumar 2021, n. sp.
No full textMegaglena agasthiya Vasanth, Subramanian & Selvakumar n. sp. (Figs 38–56) Material examined: Holotype: male larva, INDIA, Kerala, Trivandrum district, Peppara Wildlife Sanctuary, Pandipath stream, 8.67741° N, 77.19390° E; Alt. 1326 m; 19.i.2019, coll. M. Vasanth (Reg. No. I /E/436). Paratypes: 5 larvae, same data as holotype (Reg. No. I /E/437). Mature larva. Length: body 12.5–13.5 mm; antennae 2.6–3.0 mm; cerci 6.5–7.0 mm; paracercus 7.2–7.5 mm. General coloration yellowish brown (Figs 38–39). Head. Brown, washed with yellow. Upper portion of eyes conspicuously large and red (Fig. 38). Antennae pale yellow. Labrum (Figs 41–42): deep ‘U’ shaped cleft on anteromedian emargination with blunt crenation on either side; dorsum with two rows of setae; length of labrum ½ times of width. Hypopharynx (Fig. 43): lingua with well developed lateral processes, with anterior margin cleft; superlingua with row of setae on anterior margin. Mandibles (Figs 44–45): translucent, incisors and molars dark brown; scattered setae and tuft of setae laterally, inner incisor longer than outer one. Maxilla (Fig. 46): Segment I of maxillary palp longer than segment II, segment II shorter than segment III, segments I and III subequal in length, segment III with long setae at apex; outer margin of segment II with long setae; inner margins of segments II and III with short setae. Labium: palps 3-segmented, segment I broader with thick lateral setae, segments II and III subequal in length, segment III tapering at apex with a row of 5 conspicuous setae on the dorsal surface (Fig. 47). Thorax. Pale yellowish brown, irregularly washed with dark brown; lateral margins of pronotum pale yellow with diffuse black markings (Fig. 38). Legs pale yellow; coxae brown; all femora with large mesal macula dorsally. Foreleg (Fig. 48): outer surface of femur with rows of thick and scattered hair-like setae; inner surface with two rows of small stout setae, four prominent stout setae directed towards the distal end; inner surface of tibia with thick setae. Midleg (Fig. 49): dorsal surface of femur with 3 rows of short thick setae; row of short stout setae on midline; inner surface with two rows of small stout setae; tibia with rows of short setae. Hindleg (Fig. 50): femur with median brown macula on outer surface, with rows of thick and scattered hair-like setae; dorsal surface with 3 rows of short setae; inner surface with two rows of small setae; inner surface of tibia with thick setae; outer surface with few hairlike setae. Claws with 7–10 denticles which progressively increase in size apically (Fig. 51). Abdomen. Terga I–X yellowish brown with black posterior margins; terga I–X with yellowish stripe medially; posterolateral spines on abdominal segments IV–IX progressively larger posteriorly, segments VII–IX with pointed spines (Fig. 39–40). Gills on segments I–VII; gill I slender, lanceolate and bifid without branched tracheae; gills IV– VI broader from the base to middle, tapering distally (Figs 52–53). Subanal plate deeply cleft (Figs 55–56). Terminal filament longer than cerci; caudal filaments with setae of each segment, shorter than length of corresponding segment. Adult: Unknown. Etymology: This species is named after the mythological Hindu sage Agasthya, who is believed to reside in the hills of the Southern Western Ghats from where the type specimens were collected. Treat as noun in apposition. Distribution: Peppara wildlife sanctuary, Kerala, India. Diagnosis: Megaglena agasthiya n. sp. can be differentiated from the only species, M. brincki Peters & Edmunds (1970) from Sri Lanka by the following character: (i) hind femur with dark band at mid length (Fig. 50), in contrast to M. brincki, which has dark band subapically (Peters & Edmunds 1970). Habitat: Larvae of Megaglena agasthiya n. sp. inhabit a small (from 2–3 m wide) mountain stream (Pandipath stream) which is typical in the upper mountain zone (up to 1320 m a.s.l.) of the Peppara Wildlife Sanctuary, Trivandrum District, Kerala (Fig. 60). The stream is characterized by medium water temperature (18–20°С at the time of sampling), average current velocity and sandy bottom with leaf litter. The new species were found with the larvae of the Choroterpes sp., Baetis sp. and Dudgeodes sp. Discussion: Genus Megaglena was established by Peters & Edmunds (1970) based on collections of larvae and adults from several localities in Sri Lanka during Swedish Ceylon expedition from Lund University Sweden in 1962. Peters & Edmunds (1970) has given diagnostic generic features of Megaglena Peters & Edmunds 1970 based on study of larvae and respective adults collected from the same locality. The present description of Megaglena agasthiya n. sp. from southern Western Ghats streams in Kerala state of India is extension of the generic range north of Sri Lanka in adjacent southern India. Interestingly, presence of a row of setae interspersed with spines on the outer margins of fore femora is a character shared with Edmundsula Sivaramakrishnan 1985 of southern India and Sangpradubina Boonsoong & Sartori 2016 of Thailand. The phylogenetic relationships of Gondwanan atalophlebiid genera can be understood only when integrated morphological and molecular studies of this cluster of genera are undertaken as pointed already.Published as part of Vasanth, M., Subramanian, K. A., Selvakumar, C., Kubendran, T. & Sivaramakrishnan, K. G., 2021, Three new species of Atalophlebiinae (Ephemeroptera: Leptophlebiidae) of India with a new record of the genus Megaglena Peters and Edmunds, 1970, pp. 56-70 in Zootaxa 5076 (1) on pages 64-68, DOI: 10.11646/zootaxa.5076.1.7, http://zenodo.org/record/576332
Baetiella subansiri Vasanth, Selvakumar & Subramanian 2020, n. sp.
No full text<i>Baetiella subansiri</i> Vasanth, Selvakumar & Subramanian n. sp. <p>(Figs 1–18)</p> <p> <b>Material examined.</b> <b>Holotype:</b> 1 larva, INDIA, Arunachal Pradesh, Lower Subansiri district, Paniya stream, 27.81791 N, 94.09502 E, 993 m, 14.vi.2017, colls. K. A. Subramanian & M. Vasanth (Reg. No. I /E/245). <b>Paratypes</b>: 2 larvae (1 larva on slide: mouthparts, legs & gills), Arunachal Pradesh, Lower Subansiri district, Bhasskamp stream, 27.75881 N, 94.00912 E, 324 m, 15.vi.2017, colls. K. A. Subramanian & M. Vasanth (Reg. No. I/E/246).</p> <p> <b>Mature larva</b>. Body length 3.5–4.0 mm, cerci 4.0– 4.5 mm, median caudal filament with 1 segment (Figs 1–2).</p> <p> <b>Head.</b> Antennae (Fig. 6) light brown, approximately 2 times the width of head; dorsal surface of scape and pedicel bare. Labrum (Fig. 7) almost rectangular, approximately 2.0 times wider than long; anteromedian notch deep with a small rounded lobe at the base, and each side with one medial long setae and a row of 6–8 robust, simple submarginal setae, fine and simple setae scattered posteriorly; ventrally bordered with feathered setae along the anterior margin. Hypopharynx (Fig. 8) with lingua rounded and superlinguae broadly truncate, covered with abundant fine setae distally. Left mandible (Fig. 9): incisors fused with 7 denticles, prostheca robust with 4 blunt and 3–4 acute denticles apically. Right mandible (Fig. 10): incisors with visible fusion line, outer incisor with 3 denticles and inner incisor with 4 denticles, inner incisor margin smooth without fine setae, prostheca with denticles apically and distinctly more slender than the one on left mandible, edge between prostheca and molar smooth without serration. Maxilla (Fig. 11) with three canines and one tooth-like dentiseta on crown of galealacinia, a row of 4–5 long basal setae and basis of galealacinia without hump seta; maxillary palpus 2-segmented, subequal in length, terminal segment with a small pointed tip and numerous setae at apex. Labium (Fig. 12): glossae shorter than paraglossae, with a row of 10–12 stout setae along the inner margin dorsally and 2 long robust blunt setae at the apex; paraglossae approximately 1.5 times wider than glossae, with 3 rows of setae ventrally and 4–5 stout acute setae along the inner margin dorsally; labial palpus 3-segmented, terminal segment conical with a distinctive tip at apex; the 2nd segment without an inner-apical lobe; dorsal surface with numerous pores on the basal segment.</p> <p> <b>Thorax.</b> Dorsum with 12 distinct tubercles (Fig. 1). Posterior margin of metanotum with a finger-like protuberance medially (Fig. 1). Hindwing pads reduced, approximately 2.5–3.0 times longer than wide. Legs slightly paler than thorax, femora creamy shaded with light brown medially and a brown longitudinal stripe near dorsal margin, tibiae and tarsi brown. All legs with finger-like coxal projection (Fig. 2). Femora with a row of long, robust and simple 17–18 setae on dorsal margin, approximately 1/3 to 1/2 of femur width; femoral villopore reduced; tibiae with irregular row of dense, fine, simple setae dorsally; tarsi with a row of sparse, fine, simple setae dorsally and ventrally with a row of 7–8 robust, pointed setae increasing in length towards apex (Figs 13–15); tarsal claw with two rows of denticles, outer row with 6–7 acute denticles increasing in length apically, inner row with 6–7 short and blunt denticles medially, subequal in length (Fig. 16). All legs with a single very long finger-like white coxal gill (Fig. 2).</p> <p> <b>Abdomen.</b> Abdominal terga generally dark brown.Posterior margin of terga I–II each with a single posteromedian protuberance, terga III–IX each with a pair of much longer protuberances (Figs 1–4); surface of terga I–IX scattered with round scale-like setae; posterior margin of segments I–V smooth and of segments VI–IX with blunt denticles. Abdominal sterna generally yellowish-white; posterior margins of sterna I–X smooth without denticles or scale-like setae (Fig. 2). Gills (or gill sockets) on segments I–VI (Fig. 2); gills I–V elongate and without tracheation, numerous pores scattered on the surface, smooth fine simple setae along margin (Figs 17–18); gill VI reduced and transparent. Paraproct with numerous pores and fine short setae on surface and 15–16 scale-like setae along the inner margin (Fig. 5). Median caudal filament reduced to one segment (Fig. 2), cerci slightly longer than the body length (Fig. 1).</p> <p> <b>Imago.</b> Unknown.</p> <p> <b>Etymology.</b> This species is named after Subansiri river, a major tributary of Brahmaputra river in Lower Subansiri district, Arunachal Pradesh, India.</p> <p> <b>Distribution.</b> Arunachal Pradesh (India) (Fig. 81).</p> <p> <b>Diagnosis</b>. <i>Baetiella subansiri</i> <b>n. sp.</b> and <i>B. macani</i> (Müller-Liebenau, 1985) share the following characters (i) thoracic dorsum with distinct tubercles; (ii) hindwing pads vestigial; (iii) all legs with a single finger-like white coxal gill; and (iv) median caudal filament reduced to one segment, cerci slightly longer than the body length. However the new species can be distinguished from <i>B. macani</i> by the following combination of characters; (i) gills (or gill sockets) on segments I–VI (Fig. 2); gills I–V elongate and without tracheation, numerous scattered pores on the surface, smooth fine simple setae along margin (Figs 17–18); gill VI reduced (Figs 3–4); (ii) posterior margin of metanotum and abdominal terga I–II each with a single posteromedian protuberance, terga III–IX each with a pair of protuberances and the length of protuberance much longer (Figs 1–4); and (iii) claw with two rows of denticles, outer row with 6–7 acute denticles increasing in length apically, inner row with 6–7 short and blunt denticles medially, subequal in length (Fig. 16).</p> <p> <i>Baetiella subansiri</i> <b>n. sp.</b> can be accommodated in the recent global key to the larvae of <i>Baetiella</i> (Shi & Tong 2015).</p> <p> The second part of the 4 th couplet of that key can be modified and a new couplet should be added to include <i>B. subansiri</i> <b>n. sp.</b> as follows.</p> <p> 4. Gills (or gill sockets) present on terga I–VII................................................. <i>B</i>. <i>bispinosa</i> (Gose)</p> <p>- Gills (or gills sockets) absent on tergum VII................................................................ 5</p> <p> 5. Gills I–V elongate; gill VI reduced (India)..................... <i>B. subansiri</i> Vasanth, Selvakumar & Subramanian <b>n</b>. <b>sp.</b></p> <p> - Gills I–VI oval; (or gill sockets) (China, Vietnam)..................................... <i>B. macani</i> (Müller-Liebenau)</p> <p> <b>Remarks.</b> Traver (1939) described <i>Baetiella ladakae</i> based on a single male imago collected from Igoo (Igu), Ladak, in Western Himalaya in 1932, during the Yale North India Expedition. Type locality of <i>B. ladakae</i> is a high altitude (> 4000m ASL) stream in cold desert. <i>Baetiella subansiri</i> <b>sp. n.</b> described herein from larval collection could not be compared with the former species since its larvae are unknown. In view of the fact that the type localities of the two species is geographically widely separated, the latter species is described as new to science taking into consideration the remote possibility of larval-adult association of respective species by rearing in the immediate future because of the remoteness of these type localities.</p>Published as part of <i>Vasanth, M., Selvakumar, C., Subramanian, K. A., Sivaramakrishnan, K. G. & Sinha, Bikramjit, 2020, New record of the genus Baetiella Uéno, 1931 (Ephemeroptera: Baetidae) from India with description of a new species and new records for five species, pp. 563-578 in Zootaxa 4763 (4)</i> on pages 564-568, DOI: 10.11646/zootaxa.4763.4.6, <a href="http://zenodo.org/record/3762168">http://zenodo.org/record/3762168</a>
Contribution to the study of Epeorus Eaton, 1881 (Ephemeroptera: Heptageniidae) from India
No full textVasanth, M., Selvakumar, C., Subramanian, K. A., Sivaramakrishnan, K. G., Sinha, Bikramjit (2021): Contribution to the study of Epeorus Eaton, 1881 (Ephemeroptera: Heptageniidae) from India. Zootaxa 4991 (3): 499-522, DOI: https://doi.org/10.11646/zootaxa.4991.3.
Choroterpes (Choroterpes) andamanensis Vasanth, Subramanian & Selvakumar 2021, n. sp.
No full text<i>Choroterpes</i> (<i>Choroterpes</i>) <i>andamanensis</i> Vasanth, Subramanian & Selvakumar n. sp. <p>(Figs 1–16)</p> <p> <b>Material examined:</b> Holotype: male larva, INDIA, Andaman and Nicobar Islands, Botanical Garden, Nayachaar; N 11.5738°, E 92.6741°; Alt. 54m.; 16.xi.2018, coll. K. A. Subramanian (Reg. No. I /E/438). Paratypes: 3 larvae (Reg. No. I /E/439), same data as holotype.</p> <p> <b>Mature larva.</b> Length: body, 4.3–5.0 mm; antennae, 2.8–3.0 mm; cerci, 5.2–5.5 mm; paracercus, 5.8–6.0 mm. General coloration yellowish brown (Figs 1–2).</p> <p> <b>Head.</b> Dark brown, washed with yellow. Upper portion of male compound eye reddish black. Antennae whitish yellow (Fig. 1). Labrum (Fig. 3): dark brown; anteromedian emargination shallow, broad with five blunt denticles. Hypopharynx (Fig. 4): lingua with well developed lateral process, with cleft anterior margin. Mandibles (Figs 5–6): translucent, dark brown and pale brown medially; lateral margins with scattered setae, inner incisor slightly longer than outer one. Second segment of maxillary palp subequal in length of segment I, segment III approximately ¾ length of segment II (Fig. 7). Labium (Fig. 8): glossae with plate-like thick setae on ventral surface and dense row of fewer setae on dorsal surface; paraglossae with denser but thinner setae on dorsal surface; first segment of labial palp with thick setae on lateral margins, second segment with hair-like setae on lateral margin, apical segment with thick and fine setae and small tufts; length of segment I subequal to segment II, segment III approximately ¾ length of segment II.</p> <p> <b>Thorax.</b> Yellowish brown, irregularly washed with dark brown; pronotum dark yellowish brown with diffuse black markings medially. Meso- and metathorax yellowish brown tinged with dark brown or black laterally. Legs (Figs 9–11): yellowish brown; each femur with a brown macula on middle and distal region; forefemur with thick setae on the dorsal surface, mid and hind femora with several well developed thick setae on dorsal surface; each femur with thick and thin setae on outer margin; fore and mid tibiae with fine and thick setae on inner margin, and very sparse and thin setae on inner and outer margin; hind tibiae with thick and few feathered setae on surface; tarsi of all legs with several thin setae on inner margin and sparse setae on outer margins. Claws apically hooked with a row of 8–9 denticles (Fig. 12).</p> <p> <b>Abdomen.</b> Terga I–X pale yellowish brown with diffuse black markings and spines on posterior margins; posterolateral margins of abdominal terga I– III with blunt denticles and IV–IX with pointed denticles, size of denticles progressively larger posteriorly. Sterna I–VII white and VIII–IX yellowish (Figs 1–2). Gills I–VII, well-tracheated, slender, gills II –VII with dorsal lamella larger than ventral (Figs 13–16). Sternum IX of male with deep apical cleft, sternum IX of female with apex entire and without emargination (Fig. 2). Caudal filaments pale yellow-brown; with a whorl of setae on alternate segments; setae shorter than length of corresponding segment.</p> <p> <b>Adult.</b> Unknown</p> <p> <b>Etymology.</b> The species named after the type locality, Andaman Islands.</p> <p> <b>Distribution.</b> Andaman Island (India).</p> <p> <b>Diagnosis.</b> <i>Choroterpes</i> (<i>Choroterpes</i>) <i>andamanensis</i> <b>n. sp.</b> can be distinguished from all known species of subgenus <i>Choroterpes</i> by the following characters: (i) anteromedian emargination of labrum broad with five blunt denticles (Fig. 3); (ii) gills II–VII with dorsal lamella larger than ventral (Figs 14–16). (iii) femur with brown macula on middle and distal region (Figs 9–11); and (iv) claw with a row of 8–9 denticles (Fig. 12).</p> <p> <b>Habitat:</b> Larvae of <i>Choroterpes</i> (<i>Choroterpes</i>) <i>andamanensis</i> <b>n. sp.</b> inhabit small (from 1.5–2 m wide) stream (Nayachaar) (Fig. 57) (up to 54 m a.s.l.) of the Port Blair district, Andaman Island. This stream is characterized by medium water temperature (25°С at the time of sampling), average current velocity and bottom substrate predominantly with pebbles, sand, leaf litter and silt particles. The new species was found with <i>Baetis</i> sp.</p> <p> <b>Discussion.</b> Presently, three species are recorded from the subgenus <i>Choroterpes</i> s. str. in India viz., <i>Choroterpes</i> (<i>C</i>.) <i>petersi</i> Tong and Dudgeon, 2003 from southern Western Ghats by Selvakumar et al., (2015) which was originally described from Hong Kong, <i>Choroterpes</i> (<i>C</i>.) <i>kaegies</i> Selvakumar, Subramanian & Chandra, 2017 described from Himachal Pradesh and Meghalaya and the present new species, <i>Choroterpes</i> (<i>Choroterpes</i>) <i>andamanensis</i> Vasanth, Subramanian & Selvakumar <b>n. sp.</b> from the Andaman and Nicobar Islands. The distribution of <i>Choroterpes</i> (<i>C</i>.) <i>petersi</i> Tong and Dudgeon, 2003 appears to be disjunct in its geographical range. <i>Choroterpes</i> (<i>C</i>.) <i>kaegies</i> Selvakumar, Subramanian & Chandra, 2017 is widely distributed in North and North-East India. <i>Choroterpes</i> (<i>C</i>.) <i>andamanensis</i> <b>n. sp.</b> is only known from Andaman Islands. However, extensive field surveys are required to explore the distribution of this subgenus in the Indian subcontinent.</p>Published as part of <i>Vasanth, M., Subramanian, K. A., Selvakumar, C., Kubendran, T. & Sivaramakrishnan, K. G., 2021, Three new species of Atalophlebiinae (Ephemeroptera: Leptophlebiidae) of India with a new record of the genus Megaglena Peters and Edmunds, 1970, pp. 56-70 in Zootaxa 5076 (1)</i> on pages 57-60, DOI: 10.11646/zootaxa.5076.1.7, <a href="http://zenodo.org/record/5763329">http://zenodo.org/record/5763329</a>
A new species of Notacanthurus Tshernova, 1974 (Ephemeroptera: Heptageniidae) from India
No full textVasanth, M., Selvakumar, C., Subramanian, K. A., Sivaramakrishnan, K. G., Sinha, Bikramjit (2020): A new species of Notacanthurus Tshernova, 1974 (Ephemeroptera: Heptageniidae) from India. Zootaxa 4894 (3): 437-444, DOI: 10.11646/zootaxa.4894.3.
A new record of the family Isonychiidae (Insecta: Ephemeroptera) from the Western Ghats, India with a description of new species
No full textVasanth, M., Selvakumar, C., Subramanian, K. A., Babu, R., Sivaramakrishnan, K. G. (2019): A new record of the family Isonychiidae (Insecta: Ephemeroptera) from the Western Ghats, India with a description of new species. Zootaxa 4586 (1): 162-170, DOI: 10.11646/zootaxa.4586.1.
A new species and new record of the genus Platybaetis Müller-Liebenau, 1980 (Ephemeroptera: Baetidae) from Eastern Himalaya, India
No full textKubendran, T., Vasanth, M., Subramanian, K. A., Jabeen, Fatima, Sivaramakrishnan, K. G., Mitra, Pallabi (2021): A new species and new record of the genus Platybaetis Müller-Liebenau, 1980 (Ephemeroptera: Baetidae) from Eastern Himalaya, India. Zootaxa 5047 (5): 575-582, DOI: https://doi.org/10.11646/zootaxa.5047.5.
Three new species of Atalophlebiinae (Ephemeroptera: Leptophlebiidae) of India with a new record of the genus Megaglena Peters and Edmunds, 1970
No full textVasanth, M., Subramanian, K. A., Selvakumar, C., Kubendran, T., Sivaramakrishnan, K. G. (2021): Three new species of Atalophlebiinae (Ephemeroptera: Leptophlebiidae) of India with a new record of the genus Megaglena Peters and Edmunds, 1970. Zootaxa 5076 (1): 56-70, DOI: https://doi.org/10.11646/zootaxa.5076.1.
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