{"id":8247,"date":"2021-03-03T19:13:36","date_gmt":"2021-03-03T18:13:36","guid":{"rendered":"http:\/\/www.meslibellules.fr\/blog\/?p=8247"},"modified":"2026-05-27T18:58:56","modified_gmt":"2026-05-27T16:58:56","slug":"platycnemis-acutipennis-femelle-pronotum","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2021\/03\/03\/platycnemis-acutipennis-femelle-pronotum\/","title":{"rendered":"Platycnemis acutipennis femelle : pronotum"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-large is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/platycnemis-acutipennis-femelle-pronotum.jpg\"><img decoding=\"async\" width=\"1169\" height=\"1004\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/platycnemis-acutipennis-femelle-pronotum.jpg\" alt=\"\" class=\"wp-image-8242 lazyload\" style=\"--smush-placeholder-width: 1169px; --smush-placeholder-aspect-ratio: 1169\/1004;width:558px;height:479px\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/\/platycnemis-acutipennis-femelle-pronotum.jpg 1169w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/\/platycnemis-acutipennis-femelle-pronotum-768x660.jpg 768w\" data-sizes=\"(max-width: 1169px) 100vw, 1169px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Platycnemis acutipennis femelle, pronotum, Le Fuilet (France-49), 01\/07\/2012<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\" style=\"font-size:15px\">Le pronotum est un \u00e9l\u00e9ment essentiel de l'identification des femelles Platycnemis, en particulier des jeunes, mais il n'est pas pour autant un instrument facile \u00e0 utiliser. Pour Platycnemis acutipennis, on cherche \u00e0 mettre en \u00e9vidence les structures d\u00e9sign\u00e9es par les 2 fl\u00e8ches sur la photo ; il faut absolument une vue post\u00e9rieure (ou ant\u00e9rieure), m\u00eame si, avec de l'habitude, on arrive \u00e0 apercevoir ces \u00e9pines si la vue n'est pas strictement post\u00e9rieure, mais un peu lat\u00e9rale.<br>Sachant que la largeur de la t\u00eate (yeux compris) fait environ 4,5 mm, ces \u00e9pines font saillie d'environ 0,25 mm et il faut donc que la photo soit vraiment nette et que le sujet soit vraiment immobile, pas pos\u00e9 sur une herbe avec une l\u00e9g\u00e8re brise par exemple ! La solution moins \u00e9l\u00e9gante consiste \u00e0 se munir d'une bonne loupe de terrain et de capturer les sujets, ce que je ne fais que tr\u00e8s rarement en France.<br><br>Encore faut-il arriver \u00e0 apercevoir les <strong>2<\/strong> \u00e9pines, car j'ai failli me faire pi\u00e9ger une fois, l'\u00e9pine droite \u00e9tant cass\u00e9e. Si la gauche n'avait pas \u00e9t\u00e9 visible, j'aurais mal conclu l'identification. <br><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Ci-dessous \u00e0 gauche, cette image de fin avril montre une femelle \u00e9mergente, dans un pr\u00e9, \u00e0 30 m\u00e8tres de l'\u00e9tang, impossible \u00e0 identifier sans son pronotum, d'autant que la ligne inf\u00e9rieure de sa double bande ante-hum\u00e9rale appara\u00eet compl\u00e8te. Mais on voit tr\u00e8s nettement les 2 \u00e9pines.<\/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-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-2.webp\"><img decoding=\"async\" width=\"1202\" height=\"1204\" data-id=\"14254\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-2.webp\" alt=\"Platycnemis acutipennis femelle, Etang de la Coudraie (F-49), 28\/04\/23\" class=\"wp-image-14254 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-2.webp 1202w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-2-768x769.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-2-150x150.webp 150w\" data-sizes=\"(max-width: 1202px) 100vw, 1202px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1202px; --smush-placeholder-aspect-ratio: 1202\/1204;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-3-.webp\"><img decoding=\"async\" width=\"1452\" height=\"1089\" data-id=\"14741\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-3-.webp\" alt=\"Platycnemis acutipennis femelle, Lugan (F-81), 21\/06\/2023\" class=\"wp-image-14741 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-3-.webp 1452w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-3--768x576.webp 768w\" data-sizes=\"(max-width: 1452px) 100vw, 1452px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1452px; --smush-placeholder-aspect-ratio: 1452\/1089;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">Platycnemis acutipennis femelle, \u00c9tang de la Coudraie (F-49), 28\/04\/23 - Lugan (F-81), 21\/06\/2023<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Ci-dessous la photo montre, sans que je l'aie cherch\u00e9, l'\u00e9pine tr\u00e8s saillante, du c\u00f4t\u00e9 gauche.<\/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\/Platycnemis-acutipennis-pronotum-femelle-4.webp\"><img decoding=\"async\" width=\"1366\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-4.webp\" alt=\"Platycnemis acutipennis femelle, pronotum, Lugan (F-81), 19\/05\/2026\" class=\"wp-image-29408 lazyload\" style=\"--smush-placeholder-width: 1366px; --smush-placeholder-aspect-ratio: 1366\/1204;aspect-ratio:1.1345749240240006;width:448px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-4.webp 1366w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Platycnemis-acutipennis-pronotum-femelle-4-768x677.webp 768w\" data-sizes=\"(max-width: 1366px) 100vw, 1366px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Platycnemis acutipennis femelle, pronotum, Lugan (F-81), 19\/05\/2026<\/figcaption><\/figure>\n\n\n\n<div style=\"height:36px\" aria-hidden=\"true\" class=\"wp-block-spacer\"><\/div>\n\n\n\n<div class=\"wp-block-buttons is-vertical is-layout-flex wp-container-core-buttons-is-layout-2c90304e 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\/plactycnemididae\/acutipennis\/platycnemis-acutipennis-accueil.php\">Accueil P. acutipennis<\/a><\/div>\n\n\n\n<div class=\"wp-block-button\"><a class=\"wp-block-button__link wp-element-button\" href=\"https:\/\/www.meslibellules.fr\/blog\/libellules-de-france-odonates-de-france\/\">Accueil Odonates de France<\/a><\/div>\n<\/div>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Le pronotum est un \u00e9l\u00e9ment essentiel de l'identification des femelles Platycnemis, en particulier des jeunes, mais il n'est pas pour autant un instrument facile \u00e0 utiliser. Pour Platycnemis acutipennis, on cherche \u00e0 mettre en \u00e9vidence les structures d\u00e9sign\u00e9es par les 2 fl\u00e8ches sur la photo ; il faut absolument une vue post\u00e9rieure (ou ant\u00e9rieure), m\u00eame [&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":[55,106,520],"tags":[148,521,458],"class_list":["post-8247","post","type-post","status-publish","format-image","hentry","category-france","category-platycnemididae-france","category-platycnemis-acutipennis","tag-epines-pronotum","tag-platycnemis-pronotum","tag-pronotum","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Platycnemis acutipennis femelle pronotum - Mes Libellules<\/title>\n<meta name=\"description\" content=\"Platycnemis acutipennis femelle pronotum ; 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