identifier	taxonID	type	CVterm	format	language	title	description	additionalInformationURL	UsageTerms	rights	Owner	contributor	creator	bibliographicCitation
03B38784FFCE066FFE7EFB00901EB0CB.text	03B38784FFCE066FFE7EFB00901EB0CB.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eristalinus brunettii Roy, Naskar & Banerjee 2026	<div><p>Eristalinus brunettii Roy, Naskar &amp; Banerjee sp. nov.</p><p>urn:lsid:zoobank.org:act: 4A4C7F2E-0792-4EBE-A7E1-7AD822D5A903</p><p>Figs 1–3, 7A–C</p><p>Diagnosis</p><p>The species is well distinguished from morphologically similar species by a combination of the following features: scutum entirely black, without pruinose vittae in males (Fig. 1A), or indistinct pruinose vittae sometimes present laterally in females (Fig. 3A). The anterior half of the wing has a distinct yellowish brown infuscation (Fig. 1A–B), indistinct in females (Fig. 3A). The terga are mainly orange with a black posterior margin and median vittae on terga II–III (Figs 2D, 3D). In male, the ventral margin of the surstylus is sinuous at the middle (Fig. 7C).</p><p>Etymology</p><p>The species is named after Enrico Adelelmo Brunetti to honour his immense contribution to the Indian Diptera, especially Syrphidae . The specific name brunettii refers to his surname and should be treated as a noun in the genitive case.</p><p>Type material</p><p>Holotype</p><p>INDIA – West Bengal • ♂; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80362&amp;materialsCitation.latitude=22.86355" title="Search Plazi for locations around (long 87.80362/lat 22.86355)">Arambagh</a>; 22.86355° N, 87.80362° E; 15 m a.s.l.; 20 Apr. 2024; B. Roy leg.; sweep netting; GenBank no.: PQ615094; NZSI.</p><p>Paratypes</p><p>INDIA – West Bengal • 1 ♀; same collection data as for holotype; GenBank no.: PQ615095; NZSI • 1 ♂, 3 ♀♀; same collection data as for holotype; NZSI • 1 ♀; Murshidabad, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=88.37381&amp;materialsCitation.latitude=24.15341" title="Search Plazi for locations around (long 88.37381/lat 24.15341)">Malipara</a>; 24.15341° N, 88.37381° E; 40 m a.s.l.; 8 Mar. 2020; Banerjee and party leg.; pan trap; GenBank no.: ON421642; NZSI • 4 ♂♂, 3 ♀♀; Birbhum, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.52773&amp;materialsCitation.latitude=23.906384" title="Search Plazi for locations around (long 87.52773/lat 23.906384)">Suri</a>; 23.906383° N, 87.527732° E; 71 m a.s.l.; 7 Mar. 2024; B. Roy leg.; sweep netting; NZSI • 2 ♂♂, 3 ♀♀; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80362&amp;materialsCitation.latitude=22.86355" title="Search Plazi for locations around (long 87.80362/lat 22.86355)">Arambagh</a>; 22.86355° N, 87.80362° E; 15 m a.s.l.; 26 May 2024; B. Roy leg.; sweep netting; NZSI .</p><p>Description</p><p>Male</p><p>MEASUREMENTS. Body length 6.0– 8.5 mm, wing length 5.5–7.5 mm, FH 0.19–0.24, WM 2.08–2.31.</p><p>HEAD (Fig. 2A–B). Eye holoptic, yellow, with dark patches, pilose on the dorsal half, eye contiguity about 12–16 facets long; vertical triangle shining black, fully occupied by ocellar triangle, entirely covered with black pile, ocelli dark red; frons shining blueish black with black pile, lateral margin narrowly pruinose; face yellowish grey pruinose with shining blueish black median vitta, facial pilosity pale yellow; facial tubercle moderately developed, gena and subcranial cavity black; occiput black with greyish white pruinosity, pilosity black dorsally and greyish white ventrally; antennae yellowish orange, postpedicel about 1.9 × as long as wide, dorsal half dark brown, arista dark brown, bare.</p><p>THORAX. Mesonotum shining black with blue reflection, covered with dense, erect black pile; scutum without pruinose vittae; postpronotum and anterolateral area of scutum before transverse sulcus with pale yellow pruinosity; pleura black, with greyish white pruinosity on posterior half of anterior anepisternum, anterodorsally on posterior anepisternum, posteriorly on anepimeron, anterodorsally on katepisternum and meron; pleural pilosity pale yellow mainly, intermixed with black pile on anterodorsal part of anepimeron; anterior anepisternum and meron bare; posterior anepisternum densely pilose anterodorsally, rest of pleura comparatively sparsely pilose (Fig. 2C). Wings with distinct yellowish brown infuscation on anterior half, veins dark brown, pterostigma brown; calypters blackish grey (Fig. 1A); haltere orange. Legs mainly black; pale yellow at apex of pro- and mesofemur, apical half of protibia, whole mesotibia, extreme apex of metatibia, apical 1–2 tarsomeres of pro- and mesoleg, and basitarsomere of metaleg; pile on leg black and yellow intermixed; yellow on basal ⅔ of meso­ and metafemur and basal ⅓ of profemur; black pile on rest of profemur, dorsally on pro- and mesofemur, entirely on metatibia, intermixed with yellow pile on pro- and mesotibia; pile on tarsomeres of all legs yellow and black intermixed, shorter and denser than those on femora and tibia; presence of black setulae at basolateral extreme of all tibia, and apico-laterally on all tarsomeres.</p><p>ABDOMEN (Fig. 2D). Abdomen yellowish orange; tergum I with shining black area at middle; terga II– III with black posterior margin and median black vittae; tergum IV with or without median black vitta and posterior margin narrower than that on terga II–III; tergum V completely black; pile on abdomen yellow, except on black part, laterally on terga II–III, and anterolateral corner oftergum II with black pile (Fig. 2D); sterna I–III yellow, rest of sterna brownish black, pilosity on sterna yellow (Fig. 1B).</p><p>GENITALIA (Fig. 7A–C). Cercus sub-triangular, wider than high; surstylus rounded on extreme apex with black reclinate setulae (Fig. 7B), anteriorly with a few pile and scattered setulae, ventral margin of surstylus sinuate at the middle (Fig. 7A); hypandrium curved, almost uniformly broad throughout its length, postgonite with 2 ventral projections, one apical and one sub-medial, nearly equal in length (Fig. 7C).</p><p>Female (Fig. 3)</p><p>Body length 5.5–7.2 mm, wing length 5.8–7.0 mm, FH 0.27–0.30, WM 2.06–2.25. Similar to male except for normal sexual dimorphism and following characteristics: eye dichoptic, bare; postpedicel about 1.6× as long as wide; area anterior to vertex, frons and face along eye margins greyish white pruinose, pile on frons black; mesonotal pile yellow intermixed with black ones; tergum III with incomplete posterior margin and a trace of black vitta, pile on anterolateral corner of tergum II yellow.</p><p>Biology</p><p>Eristalinus brunettii Roy, Naskar &amp; Banerjee sp. nov. exhibits a preference for high­flying behaviour, typically frequenting the canopies of tall woody trees such as Mangifera indica L. ( Anacardiaceae) and Syzygium cumini (L.) Skeels ( Myrtaceae). The species also occurs occasionally on ground-cover vegetation and agricultural lands.</p><p>Distribution</p><p>West Bengal (India).</p><p>Remarks</p><p>Specimens identified herein as Eristalinus brunetti sp. nov. were previously treated as morphological variants of E. polychromata due to similarities in the general habitus and abdominal colouration. Detailed morphological examination, however, revealed consistent differences in the body pilosity, colouration, wing infuscation, and the structure of the surstylus and postgonite, separating these specimens from E. polychromata (Table 2). Additionally, the female specimen ON421642 (NZSI), earlier identified as E. polychromata (Kar et al. 2024), was re-examined and found to exhibit the diagnostic characters defined for E. brunetti; molecular analysis further recovered this specimen within the E. brunetti clade. Accordingly, the specimen is here assigned to E. brunetti as a paratype.</p></div>	https://treatment.plazi.org/id/03B38784FFCE066FFE7EFB00901EB0CB	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Roy, Bristi;Kar, Oishik;Naskar, Atanu;Sengupta, Jayita;Banerjee, Dhriti	Roy, Bristi, Kar, Oishik, Naskar, Atanu, Sengupta, Jayita, Banerjee, Dhriti (2026): Two new species of the genus Eristalinus Rondani, 1845 (Diptera: Syrphidae) from the Gangetic Plains of Eastern India. European Journal of Taxonomy 1062: 1-33, DOI: 10.5852/ejt.2026.1062.3286, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3286/14493
03B38784FFC30668FE6DFACA9132B2A5.text	03B38784FFC30668FE6DFACA9132B2A5.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eristalinus sapphirinus Roy, Naskar & Banerjee 2026	<div><p>Eristalinus sapphirinus Roy, Naskar &amp; Banerjee sp. nov.</p><p>urn:lsid:zoobank.org:act: 36EF7774-E588-41C7-B886-6684D385B68E</p><p>Figs 4–6, 7G–I</p><p>Diagnosis</p><p>Eristalinus sapphirinus Roy, Naskar &amp; Banerjee sp. nov. can be distinguished from other resembling Eristalinus by a combination of the following features. The body is shining blueish black. In male, a sharply triangular head in the lateral view, with a smooth face profile and a weakly developed facial tubercle (Fig. 5A). Wing vein R 4+5 with an appendix on the loop (Fig. 5D). The abdomen has yellowish brown maculae on tergum II and blueish grey on terga III–IV (Figs 5C, 6D). The male genitalia has the ventral margin curved of surstylus outward at the middle and rounded posteriorly (Fig. 7I).</p><p>Etymology</p><p>The specific name is from Latin sapphirinus (‘sapphire-coloured’) and indicates the shining blueish black sheen of the species.</p><p>Type material</p><p>Holotype</p><p>INDIA – West Bengal • ♂; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80363&amp;materialsCitation.latitude=22.86474" title="Search Plazi for locations around (long 87.80363/lat 22.86474)">Arambagh</a>; 22.86474° N, 87.80363° E; 15 m a.s.l.; 22 Nov. 2022; B. Roy leg.; sweep netting; GenBank no.: PQ622673; NZSI.</p><p>Paratypes</p><p>INDIA – West Bengal • 1 ♀; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80362&amp;materialsCitation.latitude=22.86355" title="Search Plazi for locations around (long 87.80362/lat 22.86355)">Arambagh</a>; 22.86355° N, 87.80362° E; 15 m a.s.l.; 20 Apr. 2024; B. Roy leg.; sweep netting; GenBank no.: PQ622674; NZSI • 1 ♂, 5 ♀♀; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80362&amp;materialsCitation.latitude=22.86355" title="Search Plazi for locations around (long 87.80362/lat 22.86355)">Arambagh</a>; 22.86355° N, 87.80362° E; 15 m a.s.l.; 20 Apr. 2024; B. Roy leg.; sweep netting; NZSI • 4 ♂♂, 5 ♀♀; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80362&amp;materialsCitation.latitude=22.86355" title="Search Plazi for locations around (long 87.80362/lat 22.86355)">Arambagh</a>; 22.86355° N, 87.80362° E; 15 m a.s.l.; 28 Mar. 2025; B. Roy leg.; sweep netting; NZSI • 1 ♀; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80278&amp;materialsCitation.latitude=22.86309" title="Search Plazi for locations around (long 87.80278/lat 22.86309)">Arambagh</a>; 22.86309° N, 87.80278° E; 15 m a.s.l.; 13 Jun. 2025; B. Roy leg.; sweep netting; NZSI .</p><p>Description</p><p>Male</p><p>MEASUREMENTS. Body length 9.9–10.2 mm, wing length 8.5–8.8 mm, FH 0.21–0.23, WM 2.10–2.20.</p><p>HEAD. Head sharply triangular laterally, strongly tapering towards vertex (Fig. 5A); eye greenish yellow with tiny purple maculae, pilose on dorsal half, eye contiguity about 19–22 facets long, eye facets larger on dorsal part; vertical triangle shining black with dark brown pile, ocelli reddish orange; frons and face with yellowish grey pruinosity, pilosity on frons black and pale yellow on face, facial tubercle poorly developed, black and bare; gena yellowish grey pruinose, subcranial cavity brown; occiput with greyish white pruinosity, with black pile dorsally and greyish white pile ventrally; antennae orange, postpedicel about 1.9 × as long as wide, orange-yellow with dark brown dorsal margin, arista bare, brownish orange, darker apically (Fig. 5A).</p><p>THORAX. Mesonotum shining blueish black, covered with yellowish brown pile, intermixed with black pile on notopleuron, lateral side of scutum after transverse sulcus, and lateral margin of scutellum, pile longer on pleura, sterna and posterior margin of scutellum; scutum with 5 longitudinal yellowish grey pruinose vittae (Fig. 4A); pleura with greyish white pruinosity on postpronotum, notopleuron, posteriorly on anterior anepisternum, upper part of anepimeron and posterior anepisternum (Fig. 5B); pleural pilosity pale yellow; anterior anepisternum and meron bare; posterior anepisternum densely pilose anterodorsally, remaining pleura comparatively sparsely pilose (Fig. 5B). Wings hyaline, stigma pale, vein R 4+5 curved, with appendix at its extreme lower point (Fig. 5D); upper and lower calypter blackish grey, with dark margins (Fig. 4A); haltere pale yellow. Legs mainly black; pale yellow at the apex of all femora, basal ½ of pro­ and mesotibia, basal ⅓ of metatibia and 1–3 tarsomeres of all legs (Fig. 4C); presence of black pile anteriorly on procoxa and trochanter, anteroventrally on mesocoxa and anteriorly on mesotrochanter; femora and tibiae with denser and longer black pile on black part and comparatively shorter and sparser pale yellow pile on pale yellow part; ventral surface of meso- and metafemur with longer pale yellow pile compared to rest of leg pilosity; black setulae present apically on all tibiae, apicolaterally on protarsomeres, ventrally and apicolaterally on mesotarsomeres, laterally on metatarsomeres.</p><p>ABDOMEN. Ovate, shining blueish black, finely punctate on dorsal surface; tergum I shining black, grey pruinose; tergum II with transverse, yellowish brown maculae (Fig. 5C) and dull black, arcuate fascia, reaching posterior margin laterally, leaving blueish grey posterior margin in middle; terga III–IV similar to tergum II, except shining blueish grey maculae; tergum V shining blueish grey; abdominal pilosity mainly yellowish white, more distinct laterally, black pile present posterolaterally on tergum II; sternum II pale yellow, with remaining sterna shining black, pilosity on sterna yellowish white.</p><p>GENITALIA (Fig. 7G–I). Cercus nearly square-like (Fig. 7G), wider than high; apex of surstylus rounded with black reclinate setulae, anteriorly with a few pile and scattered setulae (Fig. 7G–H), ventral margin expanded and curved outward at middle and rounded posteriorly; hypandrium curved, suddenly narrowing towards apex, postgonite with 2 ventral projections, one large hook-shaped projection apically and one small incurved hook, submedially (Fig. 7I).</p><p>Female (Fig. 6)</p><p>Body length 8.9–9.7 mm, wing length 7.8–8.3 mm, FH 0.26–0.30, WM 2.05–2.23. Similar to males except for normal sexual dimorphism and following characteristics: eyes dichoptic, bare; postpedicel about 1.7× as long as wide; maculae on tergum II dark brown (Fig. 6D); all sterna shining blueish black (Fig. 6B).</p><p>Biology</p><p>The species was first recorded in November 2022, feeding on Mikania micrantha Kunth ( Asteraceae) blooms along a roadside drainage channel in a locality of West Bengal. Subsequent observations in April 2024 and March 2025 in the same locality documented small aggregations, primarily of females, cooccurring with congeners — Eristalinus arvorum (Fabricius, 1787), E. megacephalus (Rossi, 1794), and E. brunettii sp. nov. — on a medium-sized Streblus asper Lour. ( Moraceae) tree adjacent to a domestic drainage system and close to sesame ( Pedaliaceae) cultivation. Females were frequently observed exhibiting slow hovering flight and prolonged floral visitation, making them more readily collectible than the agile males. Additionally, a solitary female was collected in June 2025 from a nearby sesame crop field.</p><p>Distribution</p><p>West Bengal (India).</p><p>Remarks</p><p>Eristalinus sapphirinus sp. nov. shows morphological affinities with several Indian congeners bearing a unicolourous (black, blueish black or aeneous) scutellum, but can be readily distinguished by its shining blueish black body with yellowish brown to dark brown maculae restricted to abdominal tergum II and the presence of an appendix on the loop of vein R 4+5. It differs from Eristalinus tarsalis (Macquart, 1855), which has conspicuous creamy white maculae or fasciae on the abdominal terga, by the complete absence of such markings and by its metallic blueish colouration. Among the aeneous-bodied species such as E. aeneus (Scopoli, 1763) and E. sepulchralis (Linnaeus, 1758), it is similar to them in lacking creamy abdominal markings, but differs by its vivid blueish sheen and the presence of yellowish brown to dark brown maculae on tergum II. The new species also exhibits a close affinity in the male genital morphology to E. polychromata and its allied species E. brunettii sp. nov., in the arched hypandrium and elongate, apicoventrally hooked postgonite with a distinct subventral projection; however, in E. sapphirinus, the ventral margin of the surstylus is curved outward medially and rounded posteriorly, while it is distinctly sinuous medially in E. brunettii and nearly straight in E. polychromata . Externally, E. sapphirinus can be further distinguished from E. polychromata and E. brunettii by its predominantly blueish black body with yellowish brown maculae confined to tergum II. In contrast, both E. polychromata and E. brunettii possess orange abdominal terga with black posterior margins and distinct or indistinct median vittae.</p><p>Apart from this, the male genitalia of Eristalinus sapphirinus sp. nov. share similarities with those of E. megacephalus, particularly in the structure of the epandrium, surstylus, and the curvature of the hypandrium, but differ in the configuration of the postgonite, and exhibit a marked similarity with E. taeniops (Wiedemann, 1818) in the structure of the hypandrium and postgonite (Pérez-Bañón et al. 2003).</p></div>	https://treatment.plazi.org/id/03B38784FFC30668FE6DFACA9132B2A5	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Roy, Bristi;Kar, Oishik;Naskar, Atanu;Sengupta, Jayita;Banerjee, Dhriti	Roy, Bristi, Kar, Oishik, Naskar, Atanu, Sengupta, Jayita, Banerjee, Dhriti (2026): Two new species of the genus Eristalinus Rondani, 1845 (Diptera: Syrphidae) from the Gangetic Plains of Eastern India. European Journal of Taxonomy 1062: 1-33, DOI: 10.5852/ejt.2026.1062.3286, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3286/14493
03B38784FFC40674FDBBF92495CCB2CD.text	03B38784FFC40674FDBBF92495CCB2CD.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eristalinus polychromata (Brunetti 1923)	<div><p>Eristalinus polychromata (Brunetti, 1923)</p><p>Figs 8–11, 7D–F</p><p>Eristalis polychromatus Brunetti, 1923: 180 .</p><p>Diagnosis</p><p>Small to medium-sized species (5.0– 7.2 mm). Male: eyes holoptic, pilose on dorsal half; postpedicel brownish orange, longer than wide with dark brown dorsal margin (Fig. 10A–B); mesonotum shining black, scutum with four distinct pruinose vittae (Fig. 9A); mesonotal pile yellow, intermixed with black ones (Fig. 9C); pleural pilosity all yellow (Fig. 10C); wing nearly hyaline (Fig. 9A), without distinct infuscation, though brownish tinge sometimes may present; abdomen mainly orange, tergum II with black posterior margin and distinct median black vitta, terga III–IV with narrow posterior margin (compared to tergum II), without median vittae, sometimes traces of median vitta may present anteriorly on tergum III, tergum V black (Fig. 10D); male genitalia (Fig. 7D–F): mid-ventral margin of surstylus nearly straight (Fig. 7D), hypandrium narrowing towards apex, postgonite with 2 ventral projections (Fig. 7F). Female: eyes dichoptic, bare; tergum III with distinct, black posterior margin and median vitta (Fig. 11).</p><p>Type material</p><p>Holotype (Fig. 8)</p><p>INDIA • 1 ♂; Calcutta; J. Bigot; NZSI, ZSI1411/8.</p><p>Other material examined</p><p>INDIA – West Bengal • 2 ♂♂, 6 ♀♀; Hooghly, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.80362&amp;materialsCitation.latitude=22.86355" title="Search Plazi for locations around (long 87.80362/lat 22.86355)">Arambagh</a>; 22.86355° N, 87.80362° E; 15 m a.s.l.; 26 Jun. 2022; B. Roy leg; sweep netting; NZSI • 7 ♂♂, 4 ♀♀; Birbhum, <a href="https://tb.plazi.org/GgServer/search?materialsCitation.longitude=87.52773&amp;materialsCitation.latitude=23.906384" title="Search Plazi for locations around (long 87.52773/lat 23.906384)">Suri</a>; 23.906383° N, 87.527732° E; 71 m a.s.l.; 7 Mar. 2024; B. Roy leg.; sweep netting; NZSI .</p><p>Description of male genitalia</p><p>Cercus squarish; surstylus rounded on extreme apex, with black reclinate setulae (Fig. 7H), ventral margin of surstylus nearly straight at middle (Fig. 7G); hypandrium curved, narrowing apically, postgonite with two ventral projections, apical one forms a crescent-shaped curve rather than hook, sub-medial projection hook-shaped (Fig. 7I).</p><p>Biology</p><p>The species exhibits predominantly ground-level activity and a strong association with low vegetation and crop fields. Individuals were frequently seen visiting plants, e.g., Phyla nodiflora (L.) Greene ( Verbenaceae), Mimosa pudica L. ( Fabaceae) and Croton bonplandianus Baill. ( Euphorbiaceae). Occasional co-occurrence on ground-cover vegetation with E. brunettii sp. nov. was also observed.</p><p>Distribution</p><p>Bihar, Himachal Pradesh, Kerala, Odisha, Tripura, West Bengal (India).</p><p>Remarks</p><p>Both males and females of E. polychromata share similarities with E. brunettii sp. nov. in the general appearance of the body; mainly orange abdominal terga with black posterior margins and median vittae, the complete absence of creamy white markings on abdomen, and the shape of the hypandrium and projections of postgonite. However, the two species can be readily distinguished by the characters summarized in Table 2.</p></div>	https://treatment.plazi.org/id/03B38784FFC40674FDBBF92495CCB2CD	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Roy, Bristi;Kar, Oishik;Naskar, Atanu;Sengupta, Jayita;Banerjee, Dhriti	Roy, Bristi, Kar, Oishik, Naskar, Atanu, Sengupta, Jayita, Banerjee, Dhriti (2026): Two new species of the genus Eristalinus Rondani, 1845 (Diptera: Syrphidae) from the Gangetic Plains of Eastern India. European Journal of Taxonomy 1062: 1-33, DOI: 10.5852/ejt.2026.1062.3286, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3286/14493
03B38784FFD80671FF18F8D3916BB7AD.text	03B38784FFD80671FF18F8D3916BB7AD.taxon	http://purl.org/dc/dcmitype/Text	http://rs.tdwg.org/ontology/voc/SPMInfoItems#GeneralDescription	text/html	en	Eristalinus Rondani 1845	<div><p>Key to Indian species of the genus Eristalinus (males and females)</p><p>Eristalinus quadristriatus (Macquart, 1846) is excluded from this key because no reliably identified specimens have been available for examination, and its original description is too brief to allow a confident assessment of its diagnostic characters.</p><p>1. Metafemora distinctly incrassate and arcuate, yellow with a median brown ring; metatibiae firmly compressed and carinate on basoventral ⅓ (Fig. 12A–B) (subgenus Merodonoides) ....................... ............................................................................................... Eristalinus fasciatus (Macquart, 1834)</p><p>– Metafemora at most slightly incrassate, not arcuate; metatibiae neither compressed nor carinate on basoventral ⅓ (other subgenera) (Fig. 12C–D) ................................................................................ 2</p><p>2. Eyes fasciate and maculate (subgenus Eristalodes) (Fig. 13A) ....................................................... 3</p><p>– Eyes maculate (subgenus Eristalinus) (Figs 2B, 5A) ...................................................................... 4</p><p>3. Scutum dull yellowish grey with four indistinct black vittae; tergum II with a broad uninterrupted yellow fascia bordered narrowly with black anterior and posterior margins (Kondo et al. 2024: fig. 2a) ................................................................................ Eristalinus taeniops (Wiedemann, 1818)</p><p>– Scutum pale yellow with four distinct black vittae (Fig. 13B); tergum II mostly black, with a narrow creamy white fascia interrupted medially (Fig. 13C) ....................... Eristalinus paria (Bigot, 1880)</p><p>4. Abdomen metallic green, without markings (Fig. 14A) ................................................................... 5</p><p>– Abdomen with coloured markings, at least on tergum II (Figs 5C, 6D, 14B–C) ............................. 6</p><p>5. Abdomen uniformly aeneous green, entirely covered with pale yellow pile and without markings (Fig. 14A); male holoptic ........................................................... Eristalinus aeneus (Scopoli, 1763)</p><p>– Abdomen mostly dull black, with pale yellow pile only on lateral and posterior margin of each tergum; terga II–III with aeneous maculae (Kahanpää, 2021: figs 1a, 3); male dichoptic ................. .......................................................................................... Eristalinus sepulchralis (Linnaeus, 1758)</p><p>6. Scutellum unicoloured (Figs 1A, 3A, 4A, 6A, 9A, 11A) ................................................................. 7</p><p>– Scutellum, at least partly from yellow to translucent (Fig. 15) ...................................................... 10</p><p>7. Terga mainly black, always with creamy white maculae (Ka­Lun, 2022: figs 11–12) ....................... ................................................................................................. Eristalinus tarsalis (Macquart, 1855)</p><p>– Terga differently coloured, without creamy white markings (at most tergum II with orange/yellowish brown maculae) (Figs 2D, 3D, 5C, 6D, 10D, 11D) .......................................................................... 8</p><p>8. Terga II–IV with conspicuous orange maculae, a black fascia posteriorly, and sometimes with median black vittae (Figs 2D, 3D, 10D, 11D) ............................................................................................... 9</p><p>– Only tergum II with yellowish brown maculae (more distinct in males), rest of the terga with shiny blueish grey maculae and arcuate black fascia posteriorly (Figs 5C, 6D) .......................................... ................................................................. Eristalinus sapphirinus Roy, Naskar &amp; Banerjee sp. nov.</p><p>9. Males: scutum uniformly shining black without pruinose vittae, mesonotal pile long, dense and black; tergum III with distinct median black vitta; wing with a distinct brown infuscation (Fig. 1A–C). Females: indistinct pruinose vittae may present laterally on scutum (Fig. 3A) ................................. ....................................................................... Eristalinus brunettii Roy, Naskar &amp; Banerjee sp. nov.</p><p>– Scutum with four distinct, pruinose vittae in both sexes (Figs 9A, 11A); Males: mesonotal pile short, sparse, and yellowish brown; tergum III with median black vitta indistinct or absent; wings nearly hyaline (Fig. 9A–C) ......................................................... Erisalinus polychromata (Brunetti, 1923)</p><p>10. Terga with obliquely placed creamy white markings (Fig. 15A–B) ................................................... ........................................................................................... Eristalinus obliquus (Wiedemann, 1824)</p><p>– Terga with transversely placed creamy white markings (Fig. 15C–D) ...........................................11</p><p>11. Scutum with longitudinal, strongly contrasting and continuous four shining black and five light yellow pruinose vittae (Fig. 14B–C) .............................................................................................. 12</p><p>– Scutum tawny with dull black vittae distinctly interrupted behind the transverse sulcus (Mutin 2020: fig. 1) ................................................................................... Eristalinus arulans (Wiedemann, 1824)</p><p>12. Femora mainly yellowish brown or orange (Fig. 16A–B) ... Eristalinus arvorum (Fabricius, 1787)</p><p>– Femora all black except at the extreme apex (Fig. 16C–D) ........................................................... 13</p><p>13. Abdomen short, ovate-conical (Fig. 17A–B); tarsi predominantly pale yellow, with apical 4–5 tarsomeres black (Fig. 16C–D) .................................. Eristalinus quinquestriatus (Fabricius, 1794)</p><p>– Abdomen long, elongate-conical (Figs 14C, 17C); tarsi predominantly black, with only basitarsomere pale yellow on basal ¼–½ (Fig. 18C–D, F) ................................................................................... 14</p><p>14. Males: tergum II with arcuate creamy white fascia (Smit et al. 2017: pls 10, 12). Females: fascia on tergum II not tapering laterally, attaining its maximum width sublaterally and reaching the lateral margins (Figs 14C, 18E) ................................................... Eristalinus tabanoides (Jaennicke, 1867)</p><p>– Males: tergum II without arcuate creamy white fascia (Fig. 17C). Females: fascia on tergum II tapering laterally, attaining its maximum width at middle, and not reaching the lateral margins (Fig. 18A–D) ...................................................................... Eristalinus megacephalus (Rossi, 1794)</p></div>	https://treatment.plazi.org/id/03B38784FFD80671FF18F8D3916BB7AD	Public Domain	No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.		Plazi	Roy, Bristi;Kar, Oishik;Naskar, Atanu;Sengupta, Jayita;Banerjee, Dhriti	Roy, Bristi, Kar, Oishik, Naskar, Atanu, Sengupta, Jayita, Banerjee, Dhriti (2026): Two new species of the genus Eristalinus Rondani, 1845 (Diptera: Syrphidae) from the Gangetic Plains of Eastern India. European Journal of Taxonomy 1062: 1-33, DOI: 10.5852/ejt.2026.1062.3286, URL: https://europeanjournaloftaxonomy.eu/index.php/ejt/article/download/3286/14493
