{"id":29317,"date":"2026-05-15T21:29:10","date_gmt":"2026-05-15T19:29:10","guid":{"rendered":"https:\/\/www.meslibellules.fr\/blog\/?p=29317"},"modified":"2026-05-15T21:30:53","modified_gmt":"2026-05-15T19:30:53","slug":"agriocnemis-maclachlani","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2026\/05\/15\/agriocnemis-maclachlani\/","title":{"rendered":"Ghana – Agriocnemis maclachlani Selys, 1877"},"content":{"rendered":"\n
\"Agriocnemis<\/a>
Agriocnemis maclachlani m\u00e2le, Ghana, Kakum National Park, 14\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Nous avons rencontr\u00e9 Agriocnemis maclachlani \u00e0 plusieurs reprises. Il fait partie d’un genre qui comprend actuellement 43 esp\u00e8ces en Asie, en Oc\u00e9anie et 18 en Afrique.
Trois esp\u00e8ces \u00e9taient connues au Ghana, mais nous y avons d\u00e9couvert A. victoria<\/a>, ce qui porte donc leur nombre \u00e0 quatre. Nous avons aussi rencontr\u00e9 A. zerafica<\/a>, mais nous y avons manqu\u00e9 A. exilis.<\/p>\n\n\n\n

\"Agriocnemis<\/a>
Agriocnemis maclachlani m\u00e2le, Ghana, Kakum National Park, 14\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Le thorax compl\u00e8tement couvert d’une forte pulv\u00e9rulence blanche quand il est adulte, il est facile \u00e0 identifier pour peu qu’on s’approche assez pr\u00e8s pour distinguer le pronotum et les appendices anaux (le sujet ci-dessus affiche de curieux appendices anaux ; ce sont des appendices mobiles et les inf\u00e9rieurs, les plus longs, sont ici \u00e9cart\u00e9s).

Le pronotum pr\u00e9sente un tr\u00e8s net d\u00e9crochement, une dent en saillie horizontale sur son bord post\u00e9rieur, peu redress\u00e9e, tr\u00e8s visible sur une vue sup\u00e9rieure.<\/p>\n\n\n\n

\"Pronotum<\/a>
Pronotum m\u00e2le Agriocnemis maclachlani<\/figcaption><\/figure>\n\n\n\n

Quant aux appendices anaux, ils sont faciles \u00e0 diff\u00e9rencier de ceux des trois autres esp\u00e8ces pr\u00e9sentes au Ghana ; ceux de A. zerafica<\/em> et exilis<\/em> sont respectivement courts et tr\u00e8s courts (\u00e0 peine visibles sur photos), les cerques de la m\u00eame longueur que les paraproctes. Ceux de A. victoria<\/a><\/em> sont plus proches, les inf\u00e9rieurs nettement plus longs que les sup\u00e9rieurs, mais les inf\u00e9rieurs sont forcipat\u00e9s (en forme de pince, fortement concaves en dedans) alors que ceux de Agriocnemis maclachlani sont \u00e0 peu pr\u00e8s droits, leurs extr\u00e9mit\u00e9s tr\u00e8s l\u00e9g\u00e8rement dirig\u00e9es vers le centre.<\/p>\n\n\n\n

\"Agriocnemis<\/a>
Agriocnemis maclachlani m\u00e2les, appendices anaux, Ghana, janvier 2026<\/figcaption><\/figure>\n\n\n\n

En comparaison, voici les dessins de Pinhey (1974), pour le pronotum en vue sup\u00e9rieure, les appendices anaux en vue post\u00e9ro-sup\u00e9rieure et de profil, dans sa r\u00e9vision des Agriocnemis africains.<\/p>\n\n\n\n

\"Agriocnemis<\/a>
Agriocnemis maclachlani m\u00e2le, pronotum & appendices anaux, Pinhey (1974)<\/figcaption><\/figure>\n\n\n\n

Selys nous dit que son abdomen mesure 21 mm, il atteint donc 26 mm, tr\u00e8s petit comme tous les Agriocnemis.
C’est une esp\u00e8ce des eaux dormantes et probablement des eaux temporaires, en for\u00eat (en anglais Forest Wisp<\/em>), mais dans des zones relativement ouvertes. On le trouve dans les herbes ou la v\u00e9g\u00e9tation \u00e9mergente, en eau peu profonde.<\/p>\n\n\n\n

\n
\"Forest<\/figure>\n\n\n\n
\"Agriocnemis<\/figure>\n
Agriocnemis maclachlani m\u00e2le, Ghan, Kakum National Park, 14\/01\/2026 – Hans Botel Cottage, 20\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Quand ils sont plus jeunes, le thorax est noir au-dessus, vert en dessous et les derniers segments sont rouges.<\/p>\n\n\n\n

\"Agriocnemis<\/a>
Agriocnemis maclachlani m\u00e2le, Ghana, Ankasa Forest Reserve, 19\/01\/2026<\/figcaption><\/figure>\n\n\n\n

Il est pr\u00e9sent depuis la Gambie et le S\u00e9n\u00e9gal jusqu’au Gabon au sud et l’Ouganda \u00e0 l’est.
IUCN Red List<\/a>.<\/p>\n\n\n\n

Il est parfois difficile d’identifier les femelles sur photos. Cependant, nous avons rencontr\u00e9 celles-ci en l’absence d’autre esp\u00e8ce d’Agriocnemis, entour\u00e9es de m\u00e2les de l’esp\u00e8ce. Leur pronotum avec une version r\u00e9duite de la \u00ab\u00a0dent\u00a0\u00bb du m\u00e2le correspond bien \u00e0 la description et au dessin de Pinhey (1974). Leur pruinosit\u00e9 est spectaculaire.<\/p>\n\n\n\n

\n
\"Agriocnemis<\/a><\/figure>\n\n\n\n
\"Agriocnemis<\/a><\/figure>\n
Agriocnemis maclachlani femelle, Ghana, Hans Botel Cottage, 20\/01\/2026<\/figcaption><\/figure>\n\n\n\n
\"\"<\/a><\/figure>\n\n\n\n
<\/div>\n\n\n\n
\"Forest<\/a><\/figure>
\n

\u00c9tymologie<\/strong> Agriocnemis maclachlani
Agriocnemis<\/strong>, du grec Agrios- sauvage, pour\u00a0vivant dans les champs,<\/em>\u00a0et\u00a0knemis<\/em>, qui signifie\u00a0jambi\u00e8re<\/em>\u00a0ou\u00a0legging<\/em>, comme pour nos Platycnemis europ\u00e9ens. Selys croyait les genres \u00e9troitement proches au regard des tibias, ce que je ne constate absolument pas. Ceux des Agriocnemis ne me semblent pas plus larges que ceux des autres Coenagrion. Mais \u00ab\u00a0cnemis\u00a0\u00bb dans beaucoup de noms compos\u00e9s de genre doit plut\u00f4t \u00eatre compris comme \u00ab\u00a0faisant partie des Coenagrionidae\u00a0\u00bb (voir Endersby & Fliedner (2015)).
Maclachlani <\/strong>est un hommage de Selys \u00e0 son ami Mac Lachlan. Selys \u00e9crit : \u00ab\u00a0Patrie : Le Gabon. Un couple m’a \u00e9t\u00e9 donn\u00e9 par mon ami Mac
Lachlan \u2014 S\u00e9n\u00e9gal. (Coll. Selys.)<\/em>\u00a0\u00bb Mac Lachlan \u00e9tait un entomologiste anglais, r\u00e9f\u00e9rence mondiale des Neuroptera (au sens ancien), grand sp\u00e9cialiste des Trichopt\u00e8res.<\/p>\n\n\n\n

Agriocnemis maclachlani m\u00e2le, Ghana, Adansi sud, 21\/01\/2026<\/span><\/p>\n<\/div><\/div>\n\n\n\n

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

Ian Endersby & Heinrich Fliedner<\/strong>,\u00a02015<\/strong>\u00a0\u2013\u00a0The Naming of Australia\u2019s Dragonflies<\/a>, Ian Endersby & Heinrich Fliedner, Busybird publishing.
Pinhey, 1974<\/strong> – A revision of the African Agriocnemis Selys and Mortonagrion Fraser (Odonata Coenagrionidae)<\/a>. Occasional Papers National Museums Rhodesia B Natural Science, 5, 171-278, p. 232.
Selys, 1877<\/strong> – Synopsis des agrionines, 5\u1d49 l\u00e9gion : Agrion (suite et fin). Les genres Telebasis, Argiocnemis et Hemiphlebia<\/a>. Bulletin Acad\u00e9mie royale Belgique, S\u00e9rie, 2 43, 97-159, p. 152.<\/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":"

Nous avons rencontr\u00e9 Agriocnemis maclachlani \u00e0 plusieurs reprises. Il fait partie d’un genre qui comprend actuellement 43 esp\u00e8ces en Asie, en Oc\u00e9anie et 18 en Afrique.Trois esp\u00e8ces \u00e9taient connues au Ghana, mais nous y avons d\u00e9couvert A. victoria, ce qui porte donc leur nombre \u00e0 quatre. Nous avons aussi rencontr\u00e9 A. zerafica, mais nous y […]<\/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":[38666,38663],"tags":[38667],"class_list":["post-29317","post","type-post","status-publish","format-image","hentry","category-coenagrionidae-ghana","category-ghana","tag-coenagrionidae-ghana","post_format-post-format-image"],"yoast_head":"\nAgriocnemis maclachlani - 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