{"id":17390,"date":"2023-12-17T11:11:46","date_gmt":"2023-12-17T10:11:46","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=17390"},"modified":"2023-12-17T19:46:17","modified_gmt":"2023-12-17T18:46:17","slug":"epigomphus-obtusus","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2023\/12\/17\/epigomphus-obtusus\/","title":{"rendered":"Epigomphus obtusus (Selys, 1869)"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-full is-resized\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-5.webp\"><img decoding=\"async\" width=\"1579\" height=\"1204\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-5.webp\" alt=\"Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17386 lazyload\" style=\"--smush-placeholder-width: 1579px; --smush-placeholder-aspect-ratio: 1579\/1204;width:527px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-5.webp 1579w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-5-768x586.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-5-1536x1171.webp 1536w\" data-sizes=\"(max-width: 1579px) 100vw, 1579px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Nous avons rencontr\u00e9 Epigomphus obtusus (Gomphidae) sur la Terra firme (la terre ferme, zone non inondable) apr\u00e8s 3 heures de pirogue, sur le <a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/22-08-23-Rio-Blanco.webp\">Rio Blanco<\/a>. Cela sera notre seul contact, mais il s'est montr\u00e9 patient, se d\u00e9pla\u00e7ant de feuilles en feuilles sans trop s'\u00e9loigner, pour faire admirer ses \u00e9tranges et complexes appendices anaux.<\/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\/Epigomphus-obtusus-male-1.webp\"><img decoding=\"async\" width=\"1915\" height=\"1204\" data-id=\"17382\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-1.webp\" alt=\"Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17382 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-1.webp 1915w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-1-768x483.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-1-1536x966.webp 1536w\" data-sizes=\"(max-width: 1915px) 100vw, 1915px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1915px; --smush-placeholder-aspect-ratio: 1915\/1204;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-2.webp\"><img decoding=\"async\" width=\"1450\" height=\"1204\" data-id=\"17383\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-2.webp\" alt=\"Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17383 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-2.webp 1450w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-2-768x638.webp 768w\" data-sizes=\"(max-width: 1450px) 100vw, 1450px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1450px; --smush-placeholder-aspect-ratio: 1450\/1204;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Selys, dans ses<em> Secondes additions au Synopsis des Gomphines<\/em> pr\u00e9cise que son abdomen mesure 35 \u00e0 37 mm, ce qui fait une longueur totale d'environ 49 mm. C'est un genre actuellement riche d'une trentaine d'esp\u00e8ces, dont je n'ai pourtant rencontr\u00e9 qu'un seul autre membre, au Panama, <a href=\"http:\/\/www.meslibellules.fr\/voyages\/panama\/epigomphus-quadracies\/epigomphus-quadracies-male-1.php\">E. quadracies<\/a>.<br>Il se trouvait proche d'un ruisseau en for\u00eat dense,  non loin d'autres esp\u00e8ces comme Argyrothemis argentea, Psaironeura tenuissima ou Amazoneura ephippigera.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-2 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\/Epigomphus-obtusus-male-6.webp\"><img decoding=\"async\" width=\"1167\" height=\"1204\" data-id=\"17387\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-6.webp\" alt=\"Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17387 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-6.webp 1167w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-6-768x792.webp 768w\" data-sizes=\"(max-width: 1167px) 100vw, 1167px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1167px; --smush-placeholder-aspect-ratio: 1167\/1204;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-full\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-7.webp\"><img decoding=\"async\" width=\"1211\" height=\"1204\" data-id=\"17388\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-7.webp\" alt=\"Obtusus knobtail male, Peru, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17388 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-7.webp 1211w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-7-768x764.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-7-150x150.webp 150w\" data-sizes=\"(max-width: 1211px) 100vw, 1211px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1211px; --smush-placeholder-aspect-ratio: 1211\/1204;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"> Les appendices anaux, comme ceux de tous les Epigomphus sont assez complexes, et on comprend mieux que les femelles se cachent, car c'est avec cet instrument que les m\u00e2les les attraperont derri\u00e8re la t\u00eate avec un contre appui entre les deux yeux...<br>Noter les touffes de soies rousses \u00e0 l'extr\u00e9mit\u00e9 des appendices inf\u00e9rieurs.<\/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\/Epigomphus-obtusus-male-appendices-anaux-8.webp\"><img decoding=\"async\" width=\"1752\" height=\"773\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-appendices-anaux-8.webp\" alt=\"Epigomphus obtusus m\u00e2le, appendices anaux, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17389 lazyload\" style=\"--smush-placeholder-width: 1752px; --smush-placeholder-aspect-ratio: 1752\/773;width:613px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-appendices-anaux-8.webp 1752w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-appendices-anaux-8-768x339.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-appendices-anaux-8-1536x678.webp 1536w\" data-sizes=\"(max-width: 1752px) 100vw, 1752px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Epigomphus obtusus m\u00e2le, appendices anaux, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">En lisant la description que donne Selys de cet attirail, je me demande comment un lecteur pouvait identifier l'un ou l'autre de ces Epigomphus ;sans photo sous les yeux sur la m\u00eame page, ce n'est pas facile \u00e0 suivre. Heureusement, ses lecteurs \u00e9taient des sp\u00e9cialistes, et ne r\u00eavaient m\u00eame pas encore de photos en couleur pour illustrer leurs publications.<\/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\/Description-appendices-anaux-Selys.webp\"><img decoding=\"async\" width=\"1463\" height=\"613\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Description-appendices-anaux-Selys.webp\" alt=\"Description appendices anaux Epigomphus obtusus, Secondes additions au Synopsis des Gomphines, Selys\" class=\"wp-image-17395 lazyload\" style=\"--smush-placeholder-width: 1463px; --smush-placeholder-aspect-ratio: 1463\/613;width:700px;height:auto\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Description-appendices-anaux-Selys.webp 1463w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Description-appendices-anaux-Selys-768x322.webp 768w\" data-sizes=\"(max-width: 1463px) 100vw, 1463px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" \/><\/a><figcaption class=\"wp-element-caption\">Description appendices anaux  de Epigomphus obtusus, Secondes additions au Synopsis des Gomphines, Selys<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Sa distribution est assez \u00e9tonnante, avec un gap important, entre la partie est des contreforts andains et l'ouest de l'Amazonie colombienne, le P\u00e9rou et l'\u00c9quateur.<br><a href=\"https:\/\/www.iucnredlist.org\/species\/49254474\/49255597#geographic-range\">IUCN Red List<\/a><br>Il faut tout de m\u00eame supposer que c'est une esp\u00e8ce tr\u00e8s rare, et en tout cas tr\u00e8s rarement rencontr\u00e9e, puisque avant nos observations, il n'y avait sur Inaturalist et Obervado qu'une s\u00e9rie de de Tim Fasen, sur un m\u00eame site, \u00e0 quelques jours d'intervalle en 2015.<\/p>\n\n\n\n<figure class=\"wp-block-gallery has-nested-images columns-default is-cropped wp-block-gallery-3 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\/Epigomphus-obtusus-male-3.webp\"><img decoding=\"async\" width=\"1852\" height=\"1204\" data-id=\"17384\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-3.webp\" alt=\"Obtusus knobtail male, Peru, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17384 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-3.webp 1852w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-3-768x499.webp 768w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-3-1536x999.webp 1536w\" data-sizes=\"(max-width: 1852px) 100vw, 1852px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1852px; --smush-placeholder-aspect-ratio: 1852\/1204;\" \/><\/a><\/figure>\n\n\n\n<figure class=\"wp-block-image size-large\"><a href=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-4.webp\"><img decoding=\"async\" width=\"1500\" height=\"1204\" data-id=\"17385\" data-src=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-4.webp\" alt=\"Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023\" class=\"wp-image-17385 lazyload\" data-srcset=\"https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-4.webp 1500w, https:\/\/www.meslibellules.fr\/blog\/wp-content\/uploads\/Epigomphus-obtusus-male-4-768x616.webp 768w\" data-sizes=\"(max-width: 1500px) 100vw, 1500px\" src=\"data:image\/svg+xml;base64,PHN2ZyB3aWR0aD0iMSIgaGVpZ2h0PSIxIiB4bWxucz0iaHR0cDovL3d3dy53My5vcmcvMjAwMC9zdmciPjwvc3ZnPg==\" style=\"--smush-placeholder-width: 1500px; --smush-placeholder-aspect-ratio: 1500\/1204;\" \/><\/a><\/figure>\n<figcaption class=\"blocks-gallery-caption wp-element-caption\">Epigomphus obtusus m\u00e2le, P\u00e9rou, Chino, Rio Blanco, 22\/08\/2023<\/figcaption><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\">Epigomphus (Hagen, 1854) est form\u00e9 du grec epi, pour <em>sur, \u00e0 c\u00f4t\u00e9 <\/em>et de Gomphus, qui vient, aussi  d\u2019un mot grec qui signifie&nbsp;<em>cheville<\/em>&nbsp;ou&nbsp;<em>boulon<\/em>, en r\u00e9f\u00e9rence \u00e0 la forme de l\u2019abdomen (de la plupart des esp\u00e8ces), qui ressemble \u00e0 une&nbsp;<em>cheville pour assembler les bateaux<\/em>. Epigomphus signifie donc <em>\u00e0 c\u00f4t\u00e9, proche des Gomphus<\/em> et est un des nombreux exemples de genre cr\u00e9\u00e9s pour manifester leur proximit\u00e9 au genre Gomphus.<br>Selys, dans les <em>Secondes additions au Synopsis des Gomphines<\/em>, explique qu'il a donn\u00e9 le nom <em>obtusus<\/em> en raison de la forme de la base de l'aile post\u00e9rieure : \"<em>Ailes tr\u00e8s-\u00e9troites \u00e0 la base, le bord anal tr\u00e8s-oblique, presque pas excav\u00e9, l'angle tr\u00e8s-<strong>obtu<\/strong>s, presque arrondi<\/em>\". On voit bien ce d\u00e9tail, cette faible encoche de l'aile post\u00e9rieure droite au niveau de l'<a href=\"https:\/\/meslibellules.fr\/pagesweb\/divers\/glossaire.php\">auricule<\/a>, sur la photo de droite, ci-dessus.<br>Les anglo-saxons appellent Knobtail ces Epigomphus, en raison de la forme en bouton du 10\u00b0 segment abdominal, voir la photo des appendices anaux.<\/p>\n\n\n\n<div style=\"height:52px\" 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-du-perou-peruvian-odonates\/\">Accueil P\u00e9rou<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Nous avons rencontr\u00e9 Epigomphus obtusus (Gomphidae) sur la Terra firme (la terre ferme, zone non inondable) apr\u00e8s 3 heures de pirogue, sur le Rio Blanco. Cela sera notre seul contact, mais il s'est montr\u00e9 patient, se d\u00e9pla\u00e7ant de feuilles en feuilles sans trop s'\u00e9loigner, pour faire admirer ses \u00e9tranges et complexes appendices anaux. Selys, dans [&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":[1318,1303],"tags":[1319,1305],"class_list":["post-17390","post","type-post","status-publish","format-image","hentry","category-gomphidae-perou-2","category-perou","tag-gomphidae-perou","tag-perou","post_format-post-format-image"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.0 - 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