Deliry Cyrille le 14 août 2025 à 02:34

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			'''Résumé''' (traduction libre)<br>
			Le genre zygoptère ''[[Enallagma]]'' a fait l'objet de nombreuses études comportementales et écologiques, mais les relations phylogénétiques entre les espèces n'ont été examinées qu'en Amérique du Nord orientale, et même la composition et le diagnostic du genre restent flous à l'échelle mondiale. La plupart des spécialistes reconnaissent actuellement environ soixante-dix espèces au sein du genre ''[[Enallagma]]'', comprenant deux radiations majeures, en Amérique du Nord et en Afrique. Cette étude, qui s'appuie sur des données morphologiques, démontre que les espèces nord-américaines et quelques espèces paléarctiques apparentées forment un groupe monophylétique bien distinct des espèces africaines. Ces dernières sont elles-mêmes divisées en au moins trois, et probablement quatre, clades distincts, dont l'un pourrait être apparenté à ''[[Enallagma parvum]]'' d'Inde. En conséquence, trois genres de Kennedy tombés en désuétude depuis longtemps, ''[[Africallagma]], [[Amphiallagma]]'' et ''[[Proischnura]]'' (Kennedy, 1920), sont rétablis et deux nouveaux genres, ''[[Azuragrion]]'' <u>gen.nov.</u> et ''[[Pinheyagrion]]'' <u>gen.nov.</u>, sont créés pour les taxons africains restants. Enfin, ''[[Enallagma]] est divisé en deux sous-genres, [[Enallagma (Enallagma)]]'', désigné en anglais par « bluets » typiques, qui comprennent de nombreuses espèces nord-américaines, holarctiques et paléarctiques, et ''[[Enallagma (Chromatallagma)]]'' <u>subgen.nov.</u>, qui comprend un groupe d'espèces de couleur plus variable, limité à l'Amérique du Nord, aux Caraïbes et à l'extrême nord de l'Amérique du Sud.
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	'''Abstract''' (links above)<br>		'''Abstract''' (links above)<br>
	The zygopteran genus ''Enallagma'' has been the subject of numerous behavioural and ecological studies, but phylogenetic relationships among species have been examined only within eastern North America, and even the composition and diagnosis of the genus are unclear on a world-wide basis. Most authorities currently recognize about seventy species within ''Enallagma'', comprising two major radiations, in North America and Africa. This study, using morphological data, demonstrates that the North American and a few related Palaearctic species form a monophyletic group that is quite distinct from the African species. The latter are themselves divided into at least three, and probably four, separate clades, one of which may be related to ''E. parvum'' of India. Consequently, three of Kennedy's long disused genera, ''Africallagma, Amphiallagma'' and ''Proischnura'' (Kennedy, 1920) are resurrected and two new genera, ''Azuragrion'' gen.n. and ''Pinheyagrion'' gen.n. are established for the remaining African taxa. Finally, ''Enallagma'' is divided into two subgenera, ''Enallagma'' s.s., the typical ‘bluets’, including many North American, Holarctic and Palaearctic species, and ''Chromatallagma'' subgen.n., comprising a group of species of more variable colour that is confined to North America, the Caribbean and northernmost South America.		The zygopteran genus ''Enallagma'' has been the subject of numerous behavioural and ecological studies, but phylogenetic relationships among species have been examined only within eastern North America, and even the composition and diagnosis of the genus are unclear on a world-wide basis. Most authorities currently recognize about seventy species within ''Enallagma'', comprising two major radiations, in North America and Africa. This study, using morphological data, demonstrates that the North American and a few related Palaearctic species form a monophyletic group that is quite distinct from the African species. The latter are themselves divided into at least three, and probably four, separate clades, one of which may be related to ''E. parvum'' of India. Consequently, three of Kennedy's long disused genera, ''Africallagma, Amphiallagma'' and ''Proischnura'' (Kennedy, 1920) are resurrected and two new genera, ''Azuragrion'' gen.n. and ''Pinheyagrion'' gen.n. are established for the remaining African taxa. Finally, ''Enallagma'' is divided into two subgenera, ''Enallagma'' s.s., the typical ‘bluets’, including many North American, Holarctic and Palaearctic species, and ''Chromatallagma'' subgen.n., comprising a group of species of more variable colour that is confined to North America, the Caribbean and northernmost South America.
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Deliry Cyrille : Page créée avec « {{Site}} ---- {{May2002}} ---- '''Abstract''' (links above)
The zygopteran genus ''Enallagma'' has been the subject of numerous behavioural and ecological studies, but phylogenetic relationships among species have been examined only within eastern North America, and even the composition and diagnosis of the genus are unclear on a world-wide basis. Most authorities currently recognize about seventy species within ''Enallagma'', comprising two major radiations,... »

2025-08-14T02:30:41Z

Page créée avec « {{Site}} ---- {{May2002}} ---- '''Abstract''' (links above)<br> The zygopteran genus ''Enallagma'' has been the subject of numerous behavioural and ecological studies, but phylogenetic relationships among species have been examined only within eastern North America, and even the composition and diagnosis of the genus are unclear on a world-wide basis. Most authorities currently recognize about seventy species within ''Enallagma'', comprising two major radiations,... »

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{{May2002}}
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'''Abstract''' (links above)<br>
The zygopteran genus ''Enallagma'' has been the subject of numerous behavioural and ecological studies, but phylogenetic relationships among species have been examined only within eastern North America, and even the composition and diagnosis of the genus are unclear on a world-wide basis. Most authorities currently recognize about seventy species within ''Enallagma'', comprising two major radiations, in North America and Africa. This study, using morphological data, demonstrates that the North American and a few related Palaearctic species form a monophyletic group that is quite distinct from the African species. The latter are themselves divided into at least three, and probably four, separate clades, one of which may be related to ''E. parvum'' of India. Consequently, three of Kennedy's long disused genera, ''Africallagma, Amphiallagma'' and ''Proischnura'' (Kennedy, 1920) are resurrected and two new genera, ''Azuragrion'' gen.n. and ''Pinheyagrion'' gen.n. are established for the remaining African taxa. Finally, ''Enallagma'' is divided into two subgenera, ''Enallagma'' s.s., the typical ‘bluets’, including many North American, Holarctic and Palaearctic species, and ''Chromatallagma'' subgen.n., comprising a group of species of more variable colour that is confined to North America, the Caribbean and northernmost South America.

May M.L. 2002 - Historique des versions

Deliry Cyrille le 14 août 2025 à 02:34