{"id":14454,"date":"2023-05-25T07:48:23","date_gmt":"2023-05-25T05:48:23","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=14454"},"modified":"2026-02-06T21:04:02","modified_gmt":"2026-02-06T20:04:02","slug":"tetrathemis-irregularis","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2023\/05\/25\/tetrathemis-irregularis\/","title":{"rendered":"Tetrathemis irregularis (Brauer, 1868)"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-1.webp\"><img decoding=\"async\" width=\"1556\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-1.webp\" alt=\"Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 02\/12\/2022\" class=\"wp-image-14450 lazyload\" style=\"--smush-placeholder-width: 1556px; --smush-placeholder-aspect-ratio: 1556\/1204;width:529px;height:409px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-1.webp 1556w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-1-768x594.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-1-1536x1189.webp 1536w\" data-sizes=\"(max-width: 1556px) 100vw, 1556px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 02\/12\/2022<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">J&rsquo;avais d\u00e9j\u00e0 eu la chance de rencontrer Tetrathemis irregularis en Malaisie, ceux d&rsquo;Australie me sont apparus plus marqu\u00e9s de jaune sur l&rsquo;abdomen, en particulier sur le 7\u00b0 segment abdominal, qui est <a href=\"http:\/\/www.meslibellules.fr\/voyages\/malaisie\/tetrathemis-irregularis\/tetrathemis-irregularis-male-1\/tetrathemis-irregularis-male-1big.jpg\">peu<\/a> ou <a href=\"http:\/\/www.meslibellules.fr\/voyages\/malaisie\/tetrathemis-irregularis\/tetrathemis-irregularis-male-1\/tetrathemis-irregularis-male-3big.jpg\">pas<\/a> tach\u00e9 dans la p\u00e9ninsule malaisienne. Il est en tout cas suffisamment diff\u00e9rent pour qu&rsquo;on lui ait attribu\u00e9 la d\u00e9nomination de sous-esp\u00e8ce, Tetrathemis irregularis ssp. cladophila.<br>Pour moi, c&rsquo;est une variation g\u00e9ographique comme on en rencontre beaucoup, et personne, jusqu&rsquo;\u00e0 maintenant, ne s&rsquo;est sans doute pench\u00e9 sur la question de savoir si les appendices anaux et\/ou les genitalia \u00e9taient strictement identiques ou pas&#8230;<\/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\/Tetrathemis-irregularis-male-2.webp\"><img decoding=\"async\" width=\"1476\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-2.webp\" alt=\"Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 02\/12\/2022\" class=\"wp-image-14451 lazyload\" style=\"--smush-placeholder-width: 1476px; --smush-placeholder-aspect-ratio: 1476\/1204;width:521px;height:424px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-2.webp 1476w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-2-768x626.webp 768w\" data-sizes=\"(max-width: 1476px) 100vw, 1476px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 02\/12\/2022<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Comme en Malaisie o\u00f9 je les avais trouv\u00e9s en limite de for\u00eat, au Queensland, ils se pla\u00e7aient \u00e0 l&rsquo;ombre&#8230; et le flash met en valeur leurs yeux d&rsquo;\u00e9meraude ! <br>Dans sa description, Brauer, le donne pour 28 mm pour un sujet des Philippines. J&rsquo;ai indiqu\u00e9 25 mm pour ceux de Malaisie ; c&rsquo;est plus de 10% de diff\u00e9rence, mais certainement dans les limites de variations intrasp\u00e9cifiques.<br>Je ne peux que confirmer qu&rsquo;il est&#8230; petit et tr\u00e8s beau (je suis un amoureux des yeux des odonates).<\/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\/Tetrathemis-irregularis-male-3.webp\"><img decoding=\"async\" width=\"1390\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-3.webp\" alt=\"Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 04\/12\/2022\" class=\"wp-image-14452 lazyload\" style=\"--smush-placeholder-width: 1390px; --smush-placeholder-aspect-ratio: 1390\/1204;width:509px;height:441px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-3.webp 1390w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-3-768x665.webp 768w\" data-sizes=\"(max-width: 1390px) 100vw, 1390px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 04\/12\/2022<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Il habite les ruisseaux dans la for\u00eat pluviale ; les Australiens le nomment Rainforest elf.<br>En Australie, on ne le rencontre que dans le nord-est du Queensland. Mais sa distribution est tr\u00e8s large en Asie du sud-est, depuis le sud de la Chine jusqu&rsquo;\u00e0 la Nouvelle-Guin\u00e9e, \u00e0 travers le Vietnam, la Malaisie, l&rsquo;Indon\u00e9sie et les tr\u00e8s nombreuses iles qui pars\u00e8ment tout ce territoire.<br><a href=\"https:\/\/bie.ala.org.au\/species\/https:\/\/biodiversity.org.au\/afd\/taxa\/b6f725f7-b58a-49d8-a019-448b1700fd38#gallery\">Atlas of Living Australia<\/a><br><a href=\"https:\/\/www.iucnredlist.org\/species\/167460\/87529569\">IUCN Red List<\/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\/Tetrathemis-irregularis-male-4.webp\"><img decoding=\"async\" width=\"1541\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-4.webp\" alt=\"Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 04\/12\/2022\" class=\"wp-image-14453 lazyload\" style=\"--smush-placeholder-width: 1541px; --smush-placeholder-aspect-ratio: 1541\/1204;width:504px;height:393px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-4.webp 1541w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-4-768x600.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Tetrathemis-irregularis-male-4-1536x1200.webp 1536w\" data-sizes=\"(max-width: 1541px) 100vw, 1541px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Tetrathemis irr\u00e9gularis m\u00e2le, Australie (FNQ) Cattana Wetlands, 04\/12\/2022<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>\u00c9tymologie<\/strong> Tetrathemis irregularis<br><br><strong>Tetrathemis<\/strong>, de &#8211;<em>tetra<\/em> pour &#8211;<em>quatre<\/em> et de Themis \u2013 d\u00e9esse grecque de l\u2019ordre, de la justice. Hagen en 1861 a cr\u00e9\u00e9 plusieurs noms de genres termin\u00e9s par le suffixe Themis, sans doute parce que d\u2019autres noms de libellules comportaient des noms de dieux comme Echo ou Nehalennia. Le nom de la d\u00e9esse de l\u2019ordre est particuli\u00e8rement bien adapt\u00e9 \u00e0 la taxonomie, science qui vise \u00e0 d\u00e9crire et ordonner les familles, genres et esp\u00e8ces. Le chiffre 4 se r\u00e9f\u00e8re, comme le d\u00e9crit Brauer, \u00e0 la forme de la cellule cardinale, que nous appelons sans doute abusivement triangle, qui est quadrangulaire pour ce genre.<br><strong>Irregularis<\/strong>, du latin &#8211;<em>in<\/em>, pour &#8211;<em>non<\/em>, <em>ne pas<\/em> et &#8211;<em>regularis<\/em> pour &#8211;<em>qui sert de r\u00e8gle<\/em>, l&rsquo;ensemble signifiant &#8211;<em>qui n&rsquo;est pas conforme \u00e0 la r\u00e8gle<\/em>. Ceci se rapporte une nouvelle fois \u00e0 cette cellule qui comporte 4 c\u00f4t\u00e9s au lieu des 3 habituels. T. irregularis est en effet la premi\u00e8re esp\u00e8ce d\u00e9crite de ce genre, c&rsquo;est l&rsquo;esp\u00e8ce \u00ab\u00a0type\u00a0\u00bb du genre (1).<\/p>\n\n\n\n<div style=\"height:31px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:12px\">-1- <a href=\"https:\/\/www.researchgate.net\/publication\/283318421_The_Naming_of_Australia's_Dragonflies#fullTextFileContent\">The Naming of Australia&rsquo;s Dragonflies<\/a>, Ian Endersby &amp; Heinrich Fliedner, Busybird publishing.<\/p>\n\n\n\n<div style=\"height:30px\" 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\/odonates-daustralie-australian-odonates\/\">Accueil Australie<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>J&rsquo;avais d\u00e9j\u00e0 eu la chance de rencontrer Tetrathemis irregularis en Malaisie, ceux d&rsquo;Australie me sont apparus plus marqu\u00e9s de jaune sur l&rsquo;abdomen, en particulier sur le 7\u00b0 segment abdominal, qui est peu ou pas tach\u00e9 dans la p\u00e9ninsule malaisienne. Il est en tout cas suffisamment diff\u00e9rent pour qu&rsquo;on lui ait attribu\u00e9 la d\u00e9nomination de sous-esp\u00e8ce, [&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":[684,685],"tags":[687,691],"class_list":["post-14454","post","type-post","status-publish","format-image","hentry","category-australie-nt","category-libellulidae-australie-nt","tag-australie","tag-libellulidae-australie","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.7 - 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