{"id":26181,"date":"2025-09-10T19:11:28","date_gmt":"2025-09-10T17:11:28","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=26181"},"modified":"2025-09-10T19:11:29","modified_gmt":"2025-09-10T17:11:29","slug":"pseudagrion-perfuscatum","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2025\/09\/10\/pseudagrion-perfuscatum\/","title":{"rendered":"Born\u00e9o, Sarawak – Pseudagrion perfuscatum ( Lieftinck, 1937)"},"content":{"rendered":"\n
\"Pseudagrion<\/a>
Pseudagrion perfuscatum m\u00e2le, Sarawak, Annah Rais Hot Spring, 24\/03\/2025<\/figcaption><\/figure>\n\n\n\n

En apercevant Pseudagrion perfuscatum (Coenagrionidae), j’ai tout de suite pens\u00e9 \u00e0 une esp\u00e8ce que j’ai rencontr\u00e9e au moins trois fois en Asie, Pseudagrion pruinosum<\/a> (ici en Tha\u00eflande). Je ne suis pas le seul, car F. F. Laidlaw (entre autres), c\u00e9l\u00e8bre parmi les odonatologues, descripteur de nombreuses esp\u00e8ces, a \u00e9galement \u00e9t\u00e9 victime de cette confusion (1), mais les appendices anaux sont l\u00e9g\u00e8rement (mais indubitablement) diff\u00e9rents.
Laidlaw d\u00e9crit en d\u00e9tail les diff\u00e9rences de coloration du thorax et je dois dire qu’elles me laissent sceptique et ne semble pas s’appliquer \u00e0 nos sujets qui sont tr\u00e8s similaires sur ce point. Ce qui est tr\u00e8s \u00e9vident sur mes photos et que mentionne cet auteur, c’est que les derniers segments de Pseudagrion perfuscatum ne sont jamais couverts de cette pulv\u00e9rulence blanch\u00e2tre et donc ‘l’anneau rouge’ ou les points rouges du neuvi\u00e8me segment sont toujours visibles, alors qu’ils sont simplement absents pour P. pruinosum.
Quoi qu’il en soit, il est admis que P. pruinosum n’est pas pr\u00e9sent \u00e0 Born\u00e9o (pr\u00e9sent \u00e0 Singapour).<\/p>\n\n\n\n

\"Pseudagrion<\/a>
Pseudagrion perfuscatum m\u00e2le, Sarawak, Annah Rais Hot Spring, 24\/03\/2025<\/figcaption><\/figure>\n\n\n\n

Son abdomen mesure 30 \u00e0 33 mm, appendices inclus, il mesure donc environ 39 mm. Il est plus petit que P. pruinosum donn\u00e9 pour 40 \u00e0 44 mm (2).<\/p>\n\n\n\n

\"Pseudagrion<\/a>
Pseudagrion perfuscatum m\u00e2le, Sarawak, Annah Rais Hot Spring, 24\/03\/2025<\/figcaption><\/figure>\n\n\n\n

Ci-dessus un sujet plus jeune, dont la face sup\u00e9rieure du thorax n’est pas encore envahie de pruinosit\u00e9. Noter les taches postoculaires rouges et la face rouge terne alors que celle de P. pruinosum est orange ou rouge vif<\/a> (ici au Vietnam).<\/p>\n\n\n\n

\"Pseudagrion
Pseudagrion perfuscatum m\u00e2le, Sarawak, Annah Rais Hot Spring, 24\/03\/2025<\/figcaption><\/figure>\n\n\n\n

Nous l’avons rencontr\u00e9 sur une large rivi\u00e8re, entour\u00e9e de for\u00eat, la rivi\u00e8re Timuoh ; il avait choisi une aire bien ouverte le long de la rive, une zone envahie de v\u00e9g\u00e9tation basse. Il s’est av\u00e9r\u00e9 difficile \u00e0 approcher et malgr\u00e9 le temps que j’ai pass\u00e9 pr\u00e8s de lui, j’ai r\u00e9ussi peu de photos.

Il est end\u00e9mique de Born\u00e9o, ou il ne serait absent que de l’est de Sabah.
IUCN Red List<\/a>.<\/p>\n\n\n\n

\"Pseudagrion<\/a>
Pseudagrion perfuscatum m\u00e2le, Sarawak, Annah Rais Hot Spring, 24\/03\/2025<\/figcaption><\/figure>\n\n\n\n

\u00c9tymologie<\/strong>
Pseudagrion<\/strong>\u00a0(3) du grec ancien,\u00a0pseudo<\/em>\u00a0\u2013faux, erron\u00e9,<\/em>\u00a0et d\u2019agrion<\/em>, ceci, comme l\u2019\u00e9crit Selys (1876), pour t\u00e9moigner de la difficult\u00e9 \u00e0 s\u00e9parer ce genre des Agrion ; \u00ab\u00a0les Pseudagrions semblent tr\u00e8s voisins des vrais Agrions\u00a0\u00bb. Agrion, du grec\u00a0Agrios<\/em>\u2013\u00a0sauvage<\/em>, vivant dans les champs.
Perfuscatum<\/strong> du pr\u00e9fixe per<\/em> qui signifie compl\u00e8tement, enti\u00e8rement,<\/em> et de fuscare<\/em> pour brunir, noircir<\/em>, sans doute en raison du fait que la face dorsale du thorax reste brun fonc\u00e9, alors que celle de P. pruinosum se recouvre de pruinosit\u00e9 : \u00ab\u00a0Even in
very old males the upperside of the thorax of perfuscatum always remains brown, …\u00a0\u00bb (1).<\/p>\n\n\n\n

<\/div>\n\n\n\n

1- Lieftinck, 1937 \u2013\u00a0Descriptions and records of South\u2013east Asiatic Odonata<\/a>. Treubia 16: 55\u2013119. P. 94.
2- Robin Ngiam & Marcus Ng – A photographic guide to the Dragonflies and Damselflies of Singapore – John Beaufoy Publishing \u2013 2022
3- The Naming of Australia\u2019s Dragonflies<\/a>, Ian Endersby & Heinrich Fliedner, Busybird publishing.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\n
Accueil Sarawak<\/a><\/div>\n\n\n\n
Listes des Odonates d’Asie<\/a><\/div>\n\n\n\n
Listes continentales<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

En apercevant Pseudagrion perfuscatum (Coenagrionidae), j’ai tout de suite pens\u00e9 \u00e0 une esp\u00e8ce que j’ai rencontr\u00e9e au moins trois fois en Asie, Pseudagrion pruinosum (ici en Tha\u00eflande). Je ne suis pas le seul, car F. F. Laidlaw (entre autres), c\u00e9l\u00e8bre parmi les odonatologues, descripteur de nombreuses esp\u00e8ces, a \u00e9galement \u00e9t\u00e9 victime de cette confusion (1), […]<\/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":[38596,38598],"tags":[38599,38638],"class_list":["post-26181","post","type-post","status-publish","format-image","hentry","category-borneo-sarawak","category-coenagrionidae-borneo-sarawak","tag-borneo-sarawak","tag-coenagrionidae-sarawak-2","post_format-post-format-image"],"yoast_head":"\nPseudagrion perfuscatum - 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