{"id":29725,"date":"2026-06-23T09:08:49","date_gmt":"2026-06-23T07:08:49","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=29725"},"modified":"2026-06-23T09:08:50","modified_gmt":"2026-06-23T07:08:50","slug":"separer-les-femelles-lestes-barbarus-et-lestes-virens","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2026\/06\/23\/separer-les-femelles-lestes-barbarus-et-lestes-virens\/","title":{"rendered":"S\u00e9parer les femelles Lestes barbarus et Lestes virens"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Nous sommes r\u00e9guli\u00e8rement confront\u00e9s au probl\u00e8me de s\u00e9parer les femelles Lestes barbarus et Lestes virens. Elles ont toutes les deux l'arri\u00e8re de la t\u00eate jaune. Elles ont cependant des pt\u00e9rostigmas bien diff\u00e9rents, ceux de Lestes barbarus montrant une zone claire nettement plus \u00e9tendue.<br>S'ils ne sont pas visibles, le probl\u00e8me est parfois difficile \u00e0 r\u00e9soudre car les femelles sudistes L. virens (L. virens virens) ont une bande ant\u00e9hum\u00e9rale compl\u00e8te, et large, \u00e0 la fa\u00e7on de leurs cousines L. barbarus, et on ne peut donc pas se limiter \u00e0 ce seul d\u00e9tail.<\/p>\n\n\n\n<div style=\"height:23px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Il faut \u00eatre clair, il n'y a pas de solution <em>facile.<\/em> Et comme toujours, il faut additionner les indices.<br>L'un est d\u00e9licat \u00e0 appr\u00e9cier lorsque les deux esp\u00e8ces ne sont pas l'une \u00e0 c\u00f4t\u00e9 de l'autre (le cas le plus fr\u00e9quent !) : l'\u00e9tendue de la coloration sur la face dorsale des deux derniers segments. On constate que <strong>la coloration sur S10 et surtout S9 est plus limit\u00e9e pour L. barbarus<\/strong>.<br>Autre \u00e9l\u00e9ment : l'<strong>extr\u00e9mit\u00e9 des cerques de L. virens est teint\u00e9e de sombre<\/strong>, celle de L. barbarus reste quasi immacul\u00e9e (sauf pour les vieilles femelles barbarus ou les tr\u00e8s jeunes femelles L. virens\u2026).<\/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\/Derniers-segments-L.-virens-vs-L.-barbarus.webp\"><img decoding=\"async\" width=\"756\" height=\"396\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Derniers-segments-L.-virens-vs-L.-barbarus.webp\" alt=\"Derniers segments L. virens vs L. barbarus\" class=\"wp-image-29731 lazyload\" style=\"--smush-placeholder-width: 756px; --smush-placeholder-aspect-ratio: 756\/396;aspect-ratio:1.9091194545372987;width:625px;height:auto\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Derniers segments L. virens vs L. barbarus<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:30px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Un autred\u00e9tail difficile \u00e0 trancher sur photo pour s\u00e9parer les femelles Lestes barbarus et Lestes virens est <strong>la forme de l'\u00e9caille vulvaire<\/strong>, mais c'est un crit\u00e8re absolu, au moins pour diff\u00e9rencier ces deux esp\u00e8ces, car celle de <strong>L. virens est pointue<\/strong>, celle de <strong>L. barbarus arrondie<\/strong>.<br>Noter l'extension de la coloration vers le bas sur le S9 pour L. virens.<br>Il s'agit ici d'une tr\u00e8s jeune femelle L. virens et d'une femelle L. barbarus bien mature.<\/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\/Ecaille-vulvaire-L.-virens-vs-L.-barbarus.webp\"><img decoding=\"async\" width=\"1077\" height=\"1044\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ecaille-vulvaire-L.-virens-vs-L.-barbarus.webp\" alt=\"Ecaille vulvaire L. virens vs L. barbarus\" class=\"wp-image-29733 lazyload\" style=\"--smush-placeholder-width: 1077px; --smush-placeholder-aspect-ratio: 1077\/1044;aspect-ratio:1.0316181029138252;width:518px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ecaille-vulvaire-L.-virens-vs-L.-barbarus.webp 1077w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Ecaille-vulvaire-L.-virens-vs-L.-barbarus-768x744.webp 768w\" data-sizes=\"(max-width: 1077px) 100vw, 1077px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Ecaille vulvaire L. virens vs L. barbarus<\/figcaption><\/figure>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<div style=\"height:29px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<p class=\"wp-block-paragraph\">Enfin, il existe, comme on l'a dit, deux formes de femelles<em> Lestes virens<\/em> : <em>L. virens virens<\/em> au sud de la France et <em><strong>L. virens vestalis<\/strong> <\/em>qui est la forme plus nordique et que l'on trouve au nord d'une ligne Dinan-Grenoble (ligne tr\u00e8s approximative et certainement en \u00e9volution, variable selon les guides et les g\u00e9ographes amateurs). Cette derni\u00e8re (la seule repr\u00e9sent\u00e9e sur ces photos) poss\u00e8de une <strong>bande ant\u00e9hum\u00e9rale incompl\u00e8te<\/strong>, s'arr\u00eatant quelques millim\u00e8tres avant le sinus alaire, alors que <strong>celle de L. barbarus est compl\u00e8te<\/strong> (attention, celle de L. virens virens est compl\u00e8te ! ).<br><br>Donc, si l'arri\u00e8re de la t\u00eate est clair et que la bande ant\u00e9hum\u00e9rale est incompl\u00e8te, ce n'est pas Lestes barbarus.<\/p>\n\n\n\n<figure class=\"wp-block-image aligncenter size-full\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Separer-L.-virens-de-L.-barbarus-1.webp\"><img decoding=\"async\" width=\"1916\" height=\"814\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Separer-L.-virens-de-L.-barbarus-1.webp\" alt=\"S\u00e9parer les femelles Lestes barbarus et Lestes virens\" class=\"wp-image-29728 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Separer-L.-virens-de-L.-barbarus-1.webp 1916w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Separer-L.-virens-de-L.-barbarus-1-768x326.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Separer-L.-virens-de-L.-barbarus-1-1536x653.webp 1536w\" data-sizes=\"(max-width: 1916px) 100vw, 1916px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1916px; --smush-placeholder-aspect-ratio: 1916\/814;\" \/><\/a><figcaption class=\"wp-element-caption\">Comparaison des pronotum de L. barbarus et L. virens vestalis<\/figcaption><\/figure>\n\n\n\n<p>ATTENTION, il s'agit de Lestes virens vestalis !<br \/><span style=\"text-decoration: underline;\"><br \/>La fl\u00e8che num\u00e9ro 1<\/span> montre la s\u00e9paration entre le lobe central et le lobe lat\u00e9ral du pronotum : pour L. virens, cette suture est toujours soulign\u00e9e de coloration m\u00e9tallique, coloration absente pour L. barbarus ou la suture est bien visible mais non color\u00e9e (parfois assombrie car c'est un repli). <br \/><span style=\"text-decoration: underline;\">La fl\u00e8che num\u00e9ro 2<\/span> montre un espace central non color\u00e9 sur le lobe central du pronotum. Il est \u00e9troit, en forme de triangle \u00e0 base post\u00e9rieure pour L. virens, beaucoup plus large pour L. barbarus, grossi\u00e8rement en forme de triangle tronqu\u00e9 ant\u00e9rieurement, s\u00e9parant nettement les zones droite et gauche.<br \/><br \/>Ces d\u00e9tails de coloration sont aussi pr\u00e9sents pour les m\u00e2les, mais quand ils maturent, la coloration qui s'\u00e9tend ou m\u00eame la pruinosit\u00e9 rend l'interpr\u00e9tation d\u00e9licate.<\/p>\n\n\n\n<div style=\"height:39px\" 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=\"http:\/\/www.meslibellules.fr\/pagesweb\/lestidae\/virens\/lestes-virens-accueil.php\">Accueil Lestes virens<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"http:\/\/www.meslibellules.fr\/pagesweb\/lestidae\/barbarus\/lestes-barbarus-accueil.php\">Accueil Lestes barbarus<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Nous sommes r\u00e9guli\u00e8rement confront\u00e9s au probl\u00e8me de s\u00e9parer les femelles Lestes barbarus et Lestes virens. Elles ont toutes les deux l'arri\u00e8re de la t\u00eate jaune. Elles ont cependant des pt\u00e9rostigmas bien diff\u00e9rents, ceux de Lestes barbarus montrant une zone claire nettement plus \u00e9tendue.S'ils ne sont pas visibles, le probl\u00e8me est parfois difficile \u00e0 r\u00e9soudre car [&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":[1290],"tags":[],"class_list":["post-29725","post","type-post","status-publish","format-image","hentry","category-non-classe-fr","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v27.9 - 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