{"id":20460,"date":"2024-07-22T17:39:16","date_gmt":"2024-07-22T15:39:16","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=20460"},"modified":"2025-08-28T10:04:44","modified_gmt":"2025-08-28T08:04:44","slug":"aciagrion-approximans","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2024\/07\/22\/aciagrion-approximans\/","title":{"rendered":"Tha\u00eflande &#8211; Aciagrion approximans (Selys, 1876)"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-2.webp\"><img decoding=\"async\" width=\"2310\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-2.webp\" alt=\"Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024\" class=\"wp-image-20456 lazyload\" style=\"--smush-placeholder-width: 2310px; --smush-placeholder-aspect-ratio: 2310\/1204;width:699px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-2.webp 2310w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-2-768x400.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-2-1536x801.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-2-2048x1067.webp 2048w\" data-sizes=\"(max-width: 2310px) 100vw, 2310px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024 <\/figcaption><\/figure>\n\n\n\n<p>Depuis sa description par Selys comme Pseudagrion approximans cette esp\u00e8ce a connu de nombreuses aventures et, de ce fait, il a de nombreux synonymes : Pseudagrion approximans (Selys, 1876), Aciagrion tillyardi (Laidlaw, 1919), Enallagma assamica (Fraser, 1919), Aciagrion hisopa krishna (Fraser, 1921) (1).<br>C&rsquo;est un genre difficile, surtout par le fouillis taxinomique r\u00e9sultant de la description de Selys sous le nom de Pseudagrion approximans, \u00e0 partir d&rsquo;un sujet incomplet (il manquait les derniers segments), de provenance inconnue et aujourd&rsquo;hui disparu&#8230; Devant cette incertitude, il a \u00e9t\u00e9 appel\u00e9 indiff\u00e9remment A. tillyardi ou approximans, mais Kosterin et al. (2) ont red\u00e9crit l&rsquo;esp\u00e8ce \u00e0 partir d&rsquo;un <a href=\"https:\/\/meslibellules.fr\/pagesweb\/divers\/glossaire.php\">n\u00e9otype<\/a> de la collection Selys.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-3.webp\"><img decoding=\"async\" width=\"2013\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-3.webp\" alt=\"Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 05\/06\/2024\" class=\"wp-image-20457 lazyload\" style=\"--smush-placeholder-width: 2013px; --smush-placeholder-aspect-ratio: 2013\/1204;width:607px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-3.webp 2013w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-3-768x459.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-3-1536x919.webp 1536w\" data-sizes=\"(max-width: 2013px) 100vw, 2013px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024<\/figcaption><\/figure>\n\n\n\n<p>Il est tr\u00e8s particulier par la coloration violette de son thorax, qui a tendance \u00e0 dispara\u00eetre sous la pruinosit\u00e9 qui envahi la partie inf\u00e9rieure de son thorax et des premiers segments. Il mesure 31 mm.<br>Le motif qu&rsquo;il porte sur la t\u00eate est \u00e9galement original, associant des taches postoculaires grossi\u00e8rement rectangulaires \u00e0 une ligne les joignant.<br>Ses yeux sont tricolores, sombres en haut, vert clair en bas et porte une bande m\u00e9diane vert olive, elle-m\u00eame parfois assombrie dans sa partie inf\u00e9rieure, comme le sujet de la premi\u00e8re photo.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-4.webp\"><img decoding=\"async\" width=\"1299\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-4.webp\" alt=\"Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024\" class=\"wp-image-20458 lazyload\" style=\"--smush-placeholder-width: 1299px; --smush-placeholder-aspect-ratio: 1299\/1204;width:452px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-4.webp 1299w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-4-768x712.webp 768w\" data-sizes=\"(max-width: 1299px) 100vw, 1299px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024 <\/figcaption><\/figure>\n\n\n\n<p>Les femelles sont tr\u00e8s diff\u00e9rentes et heureusement, nous avons pu voir quelques tandems pour confirmer leur identit\u00e9. Elles portent cependant le m\u00eame type de taches postoculaires.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-1 is-layout-flex wp-block-gallery-is-layout-flex\">\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-femelle-1.webp\"><img decoding=\"async\" width=\"2085\" height=\"1121\" data-id=\"20454\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-femelle-1.webp\" alt=\"Aciagrion approximans femelle, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024\" class=\"wp-image-20454 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-femelle-1.webp 2085w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-femelle-1-768x413.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-femelle-1-1536x826.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-femelle-1-2048x1101.webp 2048w\" data-sizes=\"(max-width: 2085px) 100vw, 2085px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 2085px; --smush-placeholder-aspect-ratio: 2085\/1121;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-tandem-1.webp\"><img decoding=\"async\" width=\"1976\" height=\"1204\" data-id=\"20459\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-tandem-1.webp\" alt=\"Aciagrion approximans tandem, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 05\/06\/2024\" class=\"wp-image-20459 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-tandem-1.webp 1976w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-tandem-1-768x468.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-tandem-1-1536x936.webp 1536w\" data-sizes=\"(max-width: 1976px) 100vw, 1976px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1976px; --smush-placeholder-aspect-ratio: 1976\/1204;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">Aciagrion approximans femelle, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024 <\/figcaption><\/figure>\n\n\n\n<p>On les observe sur les mares et \u00e9tangs, voire des eaux tr\u00e8s faiblement courantes. Pour nous, il s&rsquo;agit d&rsquo;une mare entour\u00e9e de for\u00eat \u00e0 1500 m\u00e8tres d&rsquo;altitude (<a href=\"https:\/\/www.google.fr\/maps\/place\/18%C2%B030'54.9%22N+98%C2%B031'47.0%22E\/@18.5138353,98.5217281,3579m\/data=!3m1!1e3!4m4!3m3!8m2!3d18.5152543!4d98.5297167!5m1!1e4?entry=ttu\">18\u00b030&rsquo;54.9&Prime;N 98\u00b031&rsquo;47.0&Prime;E<\/a>) :<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Mare-Chom-Thong-1.webp\"><img decoding=\"async\" width=\"2061\" height=\"1004\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Mare-Chom-Thong-1.webp\" alt=\"Tha\u00eflande, Ban Luang, Chom Thong, 05\/06\/2024\" class=\"wp-image-20467 lazyload\" style=\"--smush-placeholder-width: 2061px; --smush-placeholder-aspect-ratio: 2061\/1004;width:720px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Mare-Chom-Thong-1.webp 2061w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Mare-Chom-Thong-1-768x374.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Mare-Chom-Thong-1-1536x748.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Mare-Chom-Thong-1-2048x998.webp 2048w\" data-sizes=\"(max-width: 2061px) 100vw, 2061px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Tha\u00eflande,  Ban Luang, Chom Thong<\/figcaption><\/figure>\n\n\n\n<p>Sa distribution s&rsquo;\u00e9tend de l&rsquo;est de l&rsquo;Inde au sud de la Chine. Le site de l&rsquo;IUCN n&rsquo;est pas \u00e0 jour, car la re-description de l&rsquo;esp\u00e8ce a \u00e9t\u00e9 faite en 2014, et l&rsquo;\u00e9valuation pr\u00e9sent\u00e9e remonte \u00e0 2010.<br>En anglais, il prend le nom de Violet slim.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-1.webp\"><img decoding=\"async\" width=\"2075\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-1.webp\" alt=\"Violet slim male, Thaland, pond near  Chom Thong, 04\/06\/2024\" class=\"wp-image-20455 lazyload\" style=\"--smush-placeholder-width: 2075px; --smush-placeholder-aspect-ratio: 2075\/1204;width:586px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-1.webp 2075w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-1-768x446.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-1-1536x891.webp 1536w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Aciagrion-proximans-male-1-2048x1188.webp 2048w\" data-sizes=\"(max-width: 2075px) 100vw, 2075px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Aciagrion approximans m\u00e2le, Tha\u00eflande, mare pr\u00e8s de Chom Thong, 04\/06\/2024 <\/figcaption><\/figure>\n\n\n\n<p><span style=\"text-decoration: underline;\">\u00c9tymologie<\/span><br \/>Aciagrion (3) du grec <em>akis<\/em> pour <em>objet pointu, aiguille, <\/em>et de agrion, du grec\u00a0<em>agrios<\/em>\u2013\u00a0<em>sauvage<\/em>, vivant dans les champs. Selys qui a cr\u00e9\u00e9 le genre en 1891 insiste ainsi sur la forme de l&rsquo;abdomen :\u00a0\u00bb Abdomen long, excessivement gr\u00eale.\u00a0\u00bb<br \/>Approximans, du latin <em>approximans<\/em> qui signifie <em>approchant<\/em>, et Selys, en le d\u00e9crivant sous le nom de Pseudagrion approximans le trouvait tr\u00e8s proche de <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Pseudagrion-microcephalum-male-4.webp\">Pseudagrion microcephalum<\/a>. Il faut se rappeler, car cette comparaison peut sembler bien \u00e9tonnante, que les descriptions de Selys se faisaient sur des sujets morts, dont la coloration avait consid\u00e9rablement chang\u00e9.<\/p>\n\n\n\n<div style=\"height:51px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p style=\"font-size:13px\">1- <a href=\"https:\/\/www.pugetsound.edu\/puget-sound-museum-natural-history\/biodiversity-resources\/insects\/dragonflies\/world-odonata-list\">World Odonata List<\/a><br>2- Kosterin O. E., Constant, J., &amp; Wilson K. D. P. (2014). <a href=\"https:\/\/worlddragonfly.org\/article\/13887890-2014-959075\/\">Neotype of Pseudagrion approximans Selys, 1867 designatedto resolve a nomenclatorial confusion in the genus Aciagrion Selys, 1891 (Odonata: Coenagrionidae)<\/a>. InternationalJournal of Odonatology, 17, 161\u2013172.<br>3- Ian Endersby &amp; Heinrich Fliedner, The Naming of Australia\u2019s Dragonflies, Busybird publishing.<\/p>\n\n\n\n<div style=\"height:35px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-layout-flex wp-block-buttons-is-layout-flex\">\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/libellules-de-thailande\/\">Accueil Tha\u00eflande<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Depuis sa description par Selys comme Pseudagrion approximans cette esp\u00e8ce a connu de nombreuses aventures et, de ce fait, il a de nombreux synonymes : Pseudagrion approximans (Selys, 1876), Aciagrion tillyardi (Laidlaw, 1919), Enallagma assamica (Fraser, 1919), Aciagrion hisopa krishna (Fraser, 1921) (1).C&rsquo;est un genre difficile, surtout par le fouillis taxinomique r\u00e9sultant de la description [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"image","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[1380,1379],"tags":[1382,1381],"class_list":["post-20460","post","type-post","status-publish","format-image","hentry","category-coenagrionidae-thailande-2","category-thailande","tag-coenagrionidae-thailande","tag-thailande","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.5 - 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