{"id":3141,"date":"2019-06-16T22:13:59","date_gmt":"2019-06-16T20:13:59","guid":{"rendered":"http:\/\/www.meslibellules.fr\/blog\/?p=3141"},"modified":"2025-05-15T09:41:29","modified_gmt":"2025-05-15T07:41:29","slug":"les-epines-des-ailes-des-libellules","status":"publish","type":"post","link":"https:\/\/www.meslibellules.fr\/blog\/2019\/06\/16\/les-epines-des-ailes-des-libellules\/","title":{"rendered":"Les \u00e9pines des ailes des libellules… 5\/5"},"content":{"rendered":"\n
\"Mise<\/a>
Sympetrum striolatum femelle, France (49), 29\/10\/2009<\/figcaption><\/figure>\n\n\n\n


Les \u00e9pines des ailes des libellules
Il y a une dizaine d’ann\u00e9es, j’ai eu la surprise de m’apercevoir que les ailes de cette femelle Sympetrum striolatum \u00e9tait parsem\u00e9e de petites \u00e9pines ou spicules. J’ai alors regard\u00e9 les ailes des autres esp\u00e8ces et toutes pr\u00e9sentent ces structures, que ce soit des anisopt\u00e8res ou des zygopt\u00e8res.
Bien s\u00fbr, pour ces deniers, elles sont plus difficiles \u00e0 mettre en \u00e9vidence, en particulier pour les Calopteryx, plus petites sur une aile plus petite.<\/p>\n\n\n\n

\"Mise<\/a>
Ischnura elegans, France, Beaupr\u00e9au, 06\/2011<\/figcaption><\/figure>\n\n\n\n

\u00c9videmment, je n’\u00e9tais pas le premier \u00e0 m’apercevoir de cette curiosit\u00e9 publi\u00e9e par l’entomologiste Eug\u00e8ne Seguy en 1959 \u00e0 propos de Cordulia aenea.
Une \u00e9tude tr\u00e8s d\u00e9taill\u00e9e de la disposition, de la taille, de la densit\u00e9 et de la r\u00e9partition de ces \u00e9pines cuticulaires sur les Zygopt\u00e8res puis sur les Anisopt\u00e8res a \u00e9t\u00e9 men\u00e9e par M. D\u2019Andrea & S. Carfi et publi\u00e9e dans Odonatologica (1) en d\u00e9cembre 1988 et juin 1989.
<\/p>\n\n\n\n

\"Epines
Epines cuticulaires sur l’aile d’un Ceriagrion tenellum.<\/figcaption><\/figure>\n\n\n\n

Ils ont d\u00e9crit 2 types d’\u00e9pines, des courtes et des longues et montr\u00e9 pour les zygopt\u00e8res qu’elles \u00e9taient dispos\u00e9es sur les 2 faces de l’aile, mais, de fa\u00e7on diff\u00e9renci\u00e9e et selon un pattern bien pr\u00e9cis : <\/p>\n\n\n\n

\"Distribution<\/a>
Distribution des \u00e9pines courtes et longues sur les ailes des zygopt\u00e8res, Andrea & Carfi, Odonatologica, 1988. A : surface sup\u00e9rieure de l’aile B : surface inf\u00e9rieure de l’aile.<\/figcaption><\/figure>\n\n\n\n

Les \u00e9pines courtes se r\u00e9partissent sur les veines figur\u00e9es en noir, les longues sur celles en blanc et il est tr\u00e8s int\u00e9ressant de constater \u00e0 la fois cette alternance \u00e9pines longues\/ \u00e9pines courtes le long des veines longitudinales et le fait que les veines transverses ne portent d’\u00e9pines longues que sur leur face inf\u00e9rieure.
Malheureusement l’\u00e9tat actuel de mon mat\u00e9riel photographique (toutes mes photos sont faites sur du\u00a0\u00bbvivant\u00a0\u00bb) ne me permet pas de visualiser de fa\u00e7on objective cette diff\u00e9rence de taille ou de r\u00e9partition. On parle ici de structures tr\u00e8s petites<\/em> car selon ces auteurs les \u00e9pines courtes de zygopt\u00e8res mesurent entre 8 et 18 \u00b5m (0.008 mm \u00e0 0.018 mm), les \u00e9pines longues entre 20 et 70 \u00b5m (0.02 mm et 0.07 mm).
Pour Aeschna cyanea la longueur varie entre 33 et 82 \u00b5m, pour Crocothemis erythraea entre 25 et 90 \u00b5m; pour Aeshna affinis entre 30 et 66 \u00b5m.<\/p>\n\n\n\n

\"Epines<\/a>
Epines sur l’aile d’une Femelle Aeshna mixta, France, Etang de P\u00e9ronne, 20\/09\/2015<\/figcaption><\/figure>\n\n\n\n

Le point noir est que cette \u00e9tude extr\u00eamement minutieuse ne montre pas l’utilit\u00e9 ou le r\u00f4le de ces \u00e9pines des ailes des libellules…
Certaines \u00e9pines longues sont situ\u00e9es tout pr\u00e8s, presque au contact des carrefours veineux, union des veines longitudinales et des veines transverses et seraient nettement orient\u00e9es ; on sait que ces carrefours constituent des points de flexion ou de torsion de l’aile et sont d’ailleurs pourvus de resilin<\/em>e, une prot\u00e9ine \u00e9lastique capable d’emmagasiner de l’\u00e9nergie. Ces \u00e9pines auraient pour fonction, par leur inclinaison, de limiter la flexion ou la torsion au niveau de cette articulation, en bloquant le mouvement de la veine dont elles sont proches lorsqu’une certaine amplitude est atteinte. Ce r\u00f4le est avanc\u00e9 dans Donoughe & al., 2011 (2). <\/p>\n\n\n\n

\"\u00c9pines<\/a>
\u00c9pines des ailes sur Oxygastra curtisii.<\/figcaption><\/figure>\n\n\n\n

Je n’ai trouv\u00e9 aucune explication pour le reste des \u00e9pines, si ce n’est qu’on suppose qu’elles ont un r\u00f4le a\u00e9rodynamique et si un lecteur a connaissance de travaux r\u00e9cents sur ce sujet, je serai heureux d’en prendre connaissance.<\/p>\n\n\n\n

\"\"<\/a>
Boyeria irene femelle, Beaupr\u00e9au (France-49), 30\/06\/2021<\/figcaption><\/figure>\n\n\n\n
<\/div>\n\n\n\n

1- M. D\u2019Andrea and S. Carfi, 1988 – Spines on the wing veins in Odonata. 1. Zygoptera<\/a> – Odonatologica December I, 1988 17(4): 313-335 – December I, 1988
2- Seth Donoughe, James D. Crall, Rachel A. Merz, and Stacey A. Combes, 2011 – Resilin in Dragonfly and Damselfly Wings and Its Implications for Wing Flexibility<\/a> – JOURNAL OF MORPHOLOGY 000:000\u2013000 (2011)<\/p>\n\n\n\n

<\/div>\n\n\n\n
\n
Retour Ailes et Vol 4\/5<\/a><\/div>\n\n\n\n
Accueil anatomie<\/a><\/div>\n<\/div>\n\n\n\n

<\/p>\n","protected":false},"excerpt":{"rendered":"

Les \u00e9pines des ailes des libellulesIl y a une dizaine d’ann\u00e9es, j’ai eu la surprise de m’apercevoir que les ailes de cette femelle Sympetrum striolatum \u00e9tait parsem\u00e9e de petites \u00e9pines ou spicules. J’ai alors regard\u00e9 les ailes des autres esp\u00e8ces et toutes pr\u00e9sentent ces structures, que ce soit des anisopt\u00e8res ou des zygopt\u00e8res.Bien s\u00fbr, pour […]<\/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":[94,55],"tags":[],"class_list":["post-3141","post","type-post","status-publish","format-image","hentry","category-divers","category-france","post_format-post-format-image"],"yoast_head":"\n\u00e9pines des ailes des libellules - 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