{"id":28609,"date":"2026-02-18T20:57:28","date_gmt":"2026-02-18T19:57:28","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=28609"},"modified":"2026-02-19T07:05:43","modified_gmt":"2026-02-19T06:05:43","slug":"copera-sikassoensis","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2026\/02\/18\/copera-sikassoensis\/","title":{"rendered":"Ghana – Copera sikassoensis (Martin, 1912)"},"content":{"rendered":"\n
\"Copera<\/a>
Copera sikassoensis m\u00e2le, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Copera sikassoensis est un magnifique Platycnemididae, un des deux du Ghana avec C. guttifera<\/a>. Le genre comprend 5 esp\u00e8ces en Afrique, mais les esp\u00e8ces asiatiques sont tr\u00e8s ressemblantes, par exemple C. marginipes<\/a>, ici en Tha\u00eflande.<\/p>\n\n\n\n

\n
\"Copera<\/a><\/figure>\n\n\n\n
\"Copera<\/a><\/figure>\n
Copera sikassoensis m\u00e2le, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Il n’y a pas de risque de confondre Copera sikassoensis avec C. guttifera, ni avec aucun autre zygopt\u00e8re au Ghana tellement il est particulier avec sa petite taille (Little Featherleg<\/em>) ses pattes orange, ses taches bleues sur le vertex et la face et ses appendices anaux clairs. Ces taches sur le vertex sont \u00e9tonnantes ; ce ne sont pas les classiques taches postoculaires que l’on rencontre pour tant de Coenagrionidae, celles-ci sont sur le vertex, bien en avant.
J’ai d’ailleurs cru qu’elles \u00e9taient variables, parfois divis\u00e9es et donc que nous avions photographi\u00e9 diff\u00e9rents sujets ; mais ce sont les antennes qui forment une ligne noire sur ces taches claires et donnent cet aspect que l’on peut observer, en inspectant les photos de cette page (ci-dessus \u00e0 gauche, par exemple).<\/p>\n\n\n\n

\n
\"Copera<\/a><\/figure>\n\n\n\n
\"Little<\/a><\/figure>\n
Copera sikassoensis m\u00e2le, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Si toutes les photos de cette page ont \u00e9t\u00e9 prises au m\u00eame endroit, en for\u00eat, le long de la rivi\u00e8re Ankasa<\/a>, dans un des rares endroits accessibles o\u00f9 la berge \u00e9tait d\u00e9gag\u00e9e et pas trop en pente, nous avons \u00e9galement rencontr\u00e9 cette esp\u00e8ce autour d’un grand \u00e9tang<\/a>, pr\u00e8s de Cape Coast. Deux milieux tr\u00e8s diff\u00e9rents et seul le premier est cit\u00e9 dans ADDO.

Martin (1912) nous dit que son abdomen mesure 27 mm, l’insecte entier mesure environ 32 \u00e0 33 mm.<\/p>\n\n\n\n

\n
\"Copera<\/a><\/figure>\n\n\n\n
\"Little<\/a><\/figure>\n
Copera sikassoensis femelle, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Certaines femelles, voir ci-dessus, sont androchromes, leur face est moins spectaculairement bleue que celle des m\u00e2les, mais seul ce d\u00e9tail et les caract\u00e8res sexuels les en s\u00e9parent. D’autres sont totalement diff\u00e9rentes et appartiennent \u00e0 une forme \u00ab\u00a0ghost\u00a0\u00bb, c’est en tout cas le terme qu’on utilise en Asie pour certaines femelles Copera.<\/p>\n\n\n\n

\n
\"Copera<\/a><\/figure>\n\n\n\n
\"Copera<\/a><\/figure>\n
Copera sikassoensis femelle, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n
\"Copera<\/a><\/figure>
\n

Son aire de distribution s’\u00e9tend de la Gambie (et sans doute du S\u00e9n\u00e9gal jusqu’\u00e0 la R\u00e9publique centrafricaine et l’Ouganda.
IUCN Red List<\/a>.<\/p>\n\n\n\n

\"Little<\/a><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Copera sikassoensis femelles, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/span><\/p>\n<\/div><\/div>\n\n\n\n

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

\u00c9tymologie<\/strong> Copera sikassoensis
Copera<\/strong> (Kirby, 1890) serait un terme informel d\u2019origine espagnole ou argentine (suggestion de Rhainer Guillermo, professeur de Sciences Biologiques au Br\u00e9sil), issu du latin Copa<\/em>, pour \u00ab tenanci\u00e8re de cabaret \u00bb et \u00e0 l\u2019\u00e9poque de Kirby, les clients masculins de ces \u00e9tablissements d\u00e9signaient ainsi les danseuses. Il est vrai que le comportement en vol de ces Platycnemididae avec leurs pattes qui restent tendues, ou plut\u00f4t qui ne sont pas repli\u00e9es, leur aptitude \u00e0 sembler \u00ab butiner \u00bb ou \u00e0 voler de fa\u00e7on saccad\u00e9e, pourrait s\u2019apparenter \u00e0 une danse\u2026
Sikassoensis<\/strong> est form\u00e9 de Sikasso<\/em>, une ville du sud du Mali<\/em> (alors Afrique occidentale fran\u00e7aise, AOF) o\u00f9 a \u00e9t\u00e9 pr\u00e9lev\u00e9 l’holotype<\/a>, et du suffixe -ensis, indiquant la provenance. Il est \u00e0 noter que Martin a d\u00e9crit l’esp\u00e8ce dans le genre Psilocnemis, avec sans doute un sujet jeune, qui ne montrait pas des taches bleues mais jaunes.
Ces Copera africains ont d\u00e9j\u00e0 connu plusieurs autres genres, dont Platycnemis ; les analyses morphologiques et mol\u00e9culaires men\u00e9es par K-D Dijkstra & al. en 2014, ont fix\u00e9 le genre Copera.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\"Copera<\/a>
Copera sikassoensis m\u00e2le, Ghana, Ankasa Forest Reserve, 18\/01\/2026<\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

Dijkstra, K.-D.B (editor ADDO), 2019<\/strong> \u2013 African Dragonflies and Damselflies (ADDO)<\/a>  \u2013 [Le lien peut ne pas fonctionner ; lien web.archive<\/em> du site ADDO, maintenant hors ligne.]
Dijkstra, K.-D. B., Kalkman, V. J., Dow, R. A., Stokvis, F. R., & van Tol, J. (2014)<\/strong> – Redefining the damselfly families: a comprehensive molecular phylogeny of Zygoptera (Odonata)<\/a>. Systematic Entomology<\/em>, 39<\/em> (1), 68\u201396.
Martin, 1912<\/strong> – Les Libellules du cercle de Sikasso<\/a><\/em> – Feuille jeunes Naturalistes, 42, 92-99. P. 92.<\/p>\n\n\n\n

<\/div>\n\n\n\n
\n
Accueil Ghana<\/a><\/div>\n\n\n\n
Liste africaine<\/a><\/div>\n\n\n\n
Accueil<\/a><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"

Copera sikassoensis est un magnifique Platycnemididae, un des deux du Ghana avec C. guttifera. Le genre comprend 5 esp\u00e8ces en Afrique, mais les esp\u00e8ces asiatiques sont tr\u00e8s ressemblantes, par exemple C. marginipes, ici en Tha\u00eflande. Il n’y a pas de risque de confondre Copera sikassoensis avec C. guttifera, ni avec aucun autre zygopt\u00e8re au Ghana […]<\/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":[38663,38673],"tags":[38674],"class_list":["post-28609","post","type-post","status-publish","format-image","hentry","category-ghana","category-platycnemididae-ghana-2","tag-platycnemididae-ghana","post_format-post-format-image"],"yoast_head":"\nCopera sikassoensis - 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