{"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>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&rsquo;est montr\u00e9 patient, se d\u00e9pla\u00e7ant de feuilles en feuilles sans trop s&rsquo;\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>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&rsquo;environ 49 mm. C&rsquo;est un genre actuellement riche d&rsquo;une trentaine d&rsquo;esp\u00e8ces, dont je n&rsquo;ai pourtant rencontr\u00e9 qu&rsquo;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&rsquo;un ruisseau en for\u00eat dense,  non loin d&rsquo;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> Les appendices anaux, comme ceux de tous les Epigomphus sont assez complexes, et on comprend mieux que les femelles se cachent, car c&rsquo;est avec cet instrument que les m\u00e2les les attraperont derri\u00e8re la t\u00eate avec un contre appui entre les deux yeux&#8230;<br>Noter les touffes de soies rousses \u00e0 l&rsquo;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>En lisant la description que donne Selys de cet attirail, je me demande comment un lecteur pouvait identifier l&rsquo;un ou l&rsquo;autre de ces Epigomphus ;sans photo sous les yeux sur la m\u00eame page, ce n&rsquo;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>Sa distribution est assez \u00e9tonnante, avec un gap important, entre la partie est des contreforts andains et l&rsquo;ouest de l&rsquo;Amazonie colombienne, le P\u00e9rou et l&rsquo;\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&rsquo;est une esp\u00e8ce tr\u00e8s rare, et en tout cas tr\u00e8s rarement rencontr\u00e9e, puisque avant nos observations, il n&rsquo;y avait sur Inaturalist et Obervado qu&rsquo;une s\u00e9rie de de Tim Fasen, sur un m\u00eame site, \u00e0 quelques jours d&rsquo;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>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&rsquo;il a donn\u00e9 le nom <em>obtusus<\/em> en raison de la forme de la base de l&rsquo;aile post\u00e9rieure : \u00ab\u00a0<em>Ailes tr\u00e8s-\u00e9troites \u00e0 la base, le bord anal tr\u00e8s-oblique, presque pas excav\u00e9, l&rsquo;angle tr\u00e8s-<strong>obtu<\/strong>s, presque arrondi<\/em>\u00ab\u00a0. On voit bien ce d\u00e9tail, cette faible encoche de l&rsquo;aile post\u00e9rieure droite au niveau de l&rsquo;<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&rsquo;est montr\u00e9 patient, se d\u00e9pla\u00e7ant de feuilles en feuilles sans trop s&rsquo;\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 v27.3 - 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