{"id":26231,"date":"2025-09-21T19:38:11","date_gmt":"2025-09-21T17:38:11","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=26231"},"modified":"2026-01-08T08:24:11","modified_gmt":"2026-01-08T07:24:11","slug":"xiphiagrion-cyanomelas","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2025\/09\/21\/xiphiagrion-cyanomelas\/","title":{"rendered":"Born\u00e9o, Sarawak – Xiphiagrion cyanomelas (Selys, 1876)"},"content":{"rendered":"\n
\"Xiphiagrion<\/a>
Xiphiagrion cyanomelas m\u00e2le, Sarawak, Bung Ngiraja, 26\/03\/2025<\/figcaption><\/figure>\n\n\n\n

Retrouver un lien vers l’article (1) dans lequel Selys a d\u00e9crit Xiphiagrion cyanomelas a \u00e9t\u00e9 une aventure… Ses textes ont le plus souvent \u00e9t\u00e9 publi\u00e9s par le Bulletin de l’Acad\u00e9mie Royale de Belgique, mais ils sont tr\u00e8s nombreux et ont fait l’objet d’\u00e9ditions diff\u00e9rentes, de compilations, d’additions et de suites qui font que, parfois, le jeu de piste est p\u00e9nible, car la consultation page apr\u00e8s page de ces vieux documents num\u00e9ris\u00e9s n’autorise pas de recherche rapide sur des termes pr\u00e9cis (j’ai une grande partie de ses publications sous forme de .pdf, mais j’essaye toujours d’en fournir un lien).
Il a d\u00e9crit un couple provenant des Moluques, un ensemble d’iles sans doute Malaisien \u00e0 l’\u00e9poque de Selys, mais certainement Indon\u00e9sien actuellement ; et ce qui est \u00e9tonnant est qu’il mentionne \u00ab\u00a0Thorax gr\u00eale, court, noir acier en avant jusqu’au-del\u00e0 de la suture hum\u00e9rale, les c\u00f4t\u00e9s bleus, la poitrine plus p\u00e2le.\u00a0\u00bb oubliant<\/em> la petite tache bleue du m\u00e9sothorax (pourtant tellement sp\u00e9ciale<\/em>), juste en arri\u00e8re du prothorax. Sans doute avait-elle disparu sur un sujet dess\u00e9ch\u00e9 (elle est variable en taille<\/a> et peut \u00eatre plus petite encore).
Quoi qu’il en soit, je ne peux pas trouver dans mes souvenirs un Coenagrionidae avec lequel on pourrait le confondre, tant il est simplement noir et bleu. Il a assur\u00e9ment un faux air d’Ischnura sp., mais il n’a pas de taches postoculaires et ses pt\u00e9rostigmas le disqualifient d’embl\u00e9e.<\/p>\n\n\n\n

\"Xiphiagrion<\/a>
Xiphiagrion cyanomelas m\u00e2le, Sarawak, Bung Ngiraja, 26\/03\/2025<\/figcaption><\/figure>\n\n\n\n

Pour sa taille, je me r\u00e9f\u00e8re \u00e0 Ris (2) qui a rencontr\u00e9 et mesur\u00e9 Xiphiagrion karschi dans les iles Bismarck ; il sera plus tard synonymis\u00e9 avec Xiphiagrion cyanomelas. Son abdomen mesure 24 mm et le corps entier de ce zygopt\u00e8re atteint 29.5 mm.

Nous l’avons rencontr\u00e9 au bord d’un \u00e9tang<\/a>, perch\u00e9 sur des herbes \u00e9mergentes, malheureusement trop loin de nous. Dans la litt\u00e9rature, il a \u00e9t\u00e9 trouv\u00e9 au bord de ruisseaux, sur des flaques d’eau, et Lieftinck (3) rapporte son observation \u00e0 Java sur un ruisseau d\u00e9pourvu de v\u00e9g\u00e9tation, \u00e0 part des algues, dans une zone d\u00e9sol\u00e9e entre deux crat\u00e8res actifs. Les eaux sont chaudes et sulfureuses et de nombreuses larves sont pr\u00e9sentes dans une eau \u00e0 42\u00b0C ! Finalement, que les larves supportent ais\u00e9ment cette temp\u00e9rature ne doit pas nous \u00e9tonner : certaines esp\u00e8ces, comme Pantala flavescens par exemple, pondent dans des flaques d’eau dont la temp\u00e9rature, dans la journ\u00e9e, doit atteindre des valeurs tr\u00e8s importantes.

Il est pr\u00e9sent dans toute l’Indon\u00e9sie, dans tous les \u00c9tats de Born\u00e9o (donc aussi en Malaisie), en Nouvelle-Guin\u00e9e, dans les iles Salomon et Bismarck et aux Philippines.
IUCN Red List<\/a>.

Il n’y avait que 2 ou 3 m\u00e2les matures, mais aussi quelques immatures, l’occasion d’observer une femelle. Bien s\u00fbr, l’identification est confirm\u00e9e par la petite tache claire \u00e0 la partie ant\u00e9rieure du thorax.<\/p>\n\n\n\n

\n
\"Xiphiagrion<\/a><\/figure>\n\n\n\n
\"Xiphiagrion<\/a><\/figure>\n
Xiphiagrion cyanomelas femelle immature \u00e0 gauche, m\u00e2le immature \u00e0 droite, Sarawak, Bung Ngiraja, 26\/03\/2025<\/figcaption><\/figure>\n\n\n\n

Une anecdote : Roger Garrisson, fameux entomologiste am\u00e9ricain sp\u00e9cialis\u00e9 en odonatologie, expert mondial des Argia (entre autres !), a publi\u00e9 une note en 2012 (4), dans laquelle il rel\u00e8ve que Skiallagma baueri<\/em>, d\u00e9crit de l’\u00e9tat de Sao Paulo, au Br\u00e9sil est en fait un Xiphiagrion cyanomelas dont l’origine g\u00e9ographique \u00e9tait erron\u00e9e. Ce n’est pas un cas isol\u00e9, les \u00e9tiquettes attach\u00e9es aux insectes en collection sont souvent abr\u00e9g\u00e9es, vieillies et illisibles !
J’ai demand\u00e9 \u00e0 ce sp\u00e9cialiste am\u00e9ricain des odonates l’acc\u00e8s \u00e0 son article et je compl\u00e8terai cette petite rubrique lorsque je l’aurai lu.<\/p>\n\n\n\n

\u00c9tymologie<\/strong>
Xiphiagrion<\/strong> ; Selys a cr\u00e9\u00e9 ce genre pour l’esp\u00e8ce qui nous occupe ici (il n’existe qu’une seule autre esp\u00e8ce, en Nouvelle- Guin\u00e9e, X. truncatum) \u00e0 partir du grec xiphos<\/em> qui signifie \u00e9p\u00e9e, et de agrion<\/em>, du grec agrios pour sauvage, vivant dans les champs<\/em> et qui, par usage, est devenu un suffixe qui signifie \u00ab\u00a0appartenant aux Coenagrionidae\u00a0\u00bb. Cette \u00e9p\u00e9e<\/em> fait vraisemblablement r\u00e9f\u00e9rence \u00e0 l’\u00e9pine vulvaire des femelles : \u00ab\u00a0valvules vulvaires plus longues que l’abdomen, jaun\u00e2tres ainsi que l’\u00e9pine tr\u00e8s-aigu\u00eb<\/em> de leur base.\u00a0\u00bb
Cyanomelas<\/strong>, du grec ku\u00e1n\u00e9\u00f4s<\/em> pour bleu-sombre<\/em> et de melas<\/em> pour noir<\/em>, se rapporte \u00e9videmment aux deux seules couleurs port\u00e9es par ce zygopt\u00e8re si particulier que je regrette de ne pas avoir pu approcher (toutes les photos avec une focale de 300 mm).<\/p>\n\n\n\n

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

1- Selys, 1876 – Synopsis des Agrionines (Suite de la 5\u00b0 L\u00e9gion : Agrion) – Le Grand Genre Agrion<\/a> – Bulletin de l’Acad\u00e9mie royale de Belgique (S\u00e9rie 2): 41 (??): 247-322. P. 321.
2- Ris, 1900 – Libellen vom Bismarck-Archipel gesammelt durch Prof. Friedr. Dahl<\/a> – Archiv Naturgeschichte – P. 197.
3- Lieftinck, 1932 – Annotated list of Javan Odonata<\/a> – Treubia P. 400.
4- Garrisson, 2012 – Skiallagma baueri F\u00f6rster 1906, a geographically misplaced damselfly, is a junior synonym of Xiphiagrion cyanomelas Selys 1876 (Odonata: Coenagrionidae)<\/a> – Zootaxa 3514(3514):84-88.<\/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":"

Retrouver un lien vers l’article (1) dans lequel Selys a d\u00e9crit Xiphiagrion cyanomelas a \u00e9t\u00e9 une aventure… Ses textes ont le plus souvent \u00e9t\u00e9 publi\u00e9s par le Bulletin de l’Acad\u00e9mie Royale de Belgique, mais ils sont tr\u00e8s nombreux et ont fait l’objet d’\u00e9ditions diff\u00e9rentes, de compilations, d’additions et de suites qui font que, parfois, le […]<\/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-26231","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":"\nXiphiagrion cyanomelas - 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