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5 results for “Meimuna”
Individus mâles de Meimuna duffelsi, espèce récemment découverte. . Photographies de l'auteur in Une Cigale sabulicole et buveuse d'eau: un « scoop » cicadologique!
Individus mâles de Meimuna duffelsi, espèce récemment découverte. . Photographies de l'auteur
Meimuna duffelsi sur les plagettes et bancs de sable du Huai Maekampong. in Une Cigale sabulicole et buveuse d'eau: un « scoop » cicadologique!
Meimuna duffelsi sur les plagettes et bancs de sable du Huai Maekampong.
Ci-contre: Instantanés sur la biologie de quelques Cigales thaïlandaises 1, Cryptotympana aquila (Walker, 1850), mâle en train de s'alimenter (objectif de 100 mm, en cage). – 2, Cryptotympana mandarina Distant, 1891, femelle achevant sa métamorphose (objectif de 135 mm, in natura, 0 h 45). – 3, Meimuna durga (Distant, 1881); mâle cymbalisant, ailes non écartées (objectif de 135 mm, in natura, 14 h 15). – 4, Meimuna durga (Distant, 1881), mâle et femelle accouplés (objectif de 135 mm, in natura, 13 h 45). – 5, Pomponia linearis (Walker, 1850), mâle au repos (objectif de 135 mm, in natura, le matin, vers 11 heures). – 6 et 7, Tanna ventriroseus n. sp., mâle cymbalisant (6); mâle s'alimentant (7); (objectif de 100 mm, en cage). – 8, Terpnosia nonusaprilis n. sp., mâle cymbalisant, ailes non écartées (objectif de 135 mm, in natura). – 9, Terpnosia nonpareil s n. sp., mâle et femelle accouplés (objectif de 300 mm, in natura, 11 h 55). – 10, Meimuna tavoyana (Distant, 1888), mâle; vue des 3/4 ventraux mettant en évidence la forme et l'écartement de ses opercules (objectif de 100 mm, en cage). – 11, Gaeana cheni Chou & Yao, 1985, mâle achevant de se métamorphoser (objectif de 135 mm, in natura, la nuit, 3 h 17). – 12, Gaeana cheni Chou & Yao, 1985, couple venant de chuter à terre (objectif de 135 mm, 14 h 35). – 13, Ambragaeana ambra Chou & Yao, 1985, mâle dans la phase finale de sa métamorphose, achevant de pigmenter sa livrée (objectif de 135 mm, in natura, au milieu d'une matinée ensoleillée). (Photographies Michel Boulard). in Éthologie sonore et statut acoustique de quelques Cigales thaïlandaises, incluant la description de deux espèces nouvelles (Hemiptera : Auchenorhyncha*, Cicadoidea, Cicadidae)
Ci-contre: Instantanés sur la biologie de quelques Cigales thaïlandaises 1, Cryptotympana aquila (Walker, 1850), mâle en train de s'alimenter (objectif de 100 mm, en cage). – 2, Cryptotympana mandarina Distant, 1891, femelle achevant sa métamorphose (objectif de 135 mm, in natura, 0 h 45). – 3, Meimuna durga (Distant, 1881); mâle cymbalisant, ailes non écartées (objectif de 135 mm, in natura, 14 h 15). – 4, Meimuna durga (Distant, 1881), mâle et femelle accouplés (objectif de 135 mm, in natura, 13 h 45). – 5, Pomponia linearis (Walker, 1850), mâle au repos (objectif de 135 mm, in natura, le matin, vers 11 heures). – 6 et 7, Tanna ventriroseus n. sp., mâle cymbalisant (6); mâle s'alimentant (7); (objectif de 100 mm, en cage). – 8, Terpnosia nonusaprilis n. sp., mâle cymbalisant, ailes non écartées (objectif de 135 mm, in natura). – 9, Terpnosia nonpareil s n. sp., mâle et femelle accouplés (objectif de 300 mm, in natura, 11 h 55). – 10, Meimuna tavoyana (Distant, 1888), mâle; vue des 3/4 ventraux mettant en évidence la forme et l'écartement de ses opercules (objectif de 100 mm, en cage). – 11, Gaeana cheni Chou & Yao, 1985, mâle achevant de se métamorphoser (objectif de 135 mm, in natura, la nuit, 3 h 17). – 12, Gaeana cheni Chou & Yao, 1985, couple venant de chuter à terre (objectif de 135 mm, 14 h 35). – 13, Ambragaeana ambra Chou & Yao, 1985, mâle dans la phase finale de sa métamorphose, achevant de pigmenter sa livrée (objectif de 135 mm, in natura, au milieu d'une matinée ensoleillée). (Photographies Michel Boulard).
Phylogeography of Meimuna cicadas on continental and oceanic islands of Japan in the north-western Pacific region
<p><span><span><span><span><span><span><span><span><span><span><span>Islands are a challenging habitat for organisms with weak dispersal power. We aimed to elucidate how geological history, geography, accidental dispersal events and species ecology affected different colonisation and genetic divergence patterns on continental and oceanic islands among species of a cicada group, which are poor dispersers.</span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span><b>Location: </b>Japanese Archipelago, Ogasawara Islands, Ryukyu Archipelago.</span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span><b>Taxon:</b> Cicadas of the genus <i>Meimuna </i>(Hemiptera: Cicadidae).</span></span></span></span></span></span></span></span></span></span></span></p> <p><span><span><span><span><span><span><span><span><span><span><span>We performed phylogenetic analysis, divergence time estimation, and ancestral area reconstruction using two mitochondrial and four nuclear gene sequences and population genetics analyses, including Bayesian skyline plotting using a mitochondrial gene sequence. </span></span></span></span></span></span></span></span></span></span></span><span><span><span><span><span><span><span><span><span><span><span><i>Meimuna opalifera</i> in the Japanese Archipelago, which was connected to the continent during the glacial periods, diverged from the continental populations 0.4 million years ago (Ma). In the Ryukyu Archipelago, which became disconnected from the continent earlier, two endemic species <i>M. kuroiwae</i> and <i>M. oshimensis</i> diverged 2.5 Ma; these species showed differences in intraspecific genetic differentiation and range expansion. Furthermore, <i>M. iwasakii</i>colonised the South Ryukyus from Taiwan Island later than 1.4 Ma, whereas<i> M. boninensis</i>, which is endemic to the oceanic Ogasawara Islands, diverged from <i>M. kuroiwae</i> in the Middle Ryukyus 1.4 Ma. </span></span></span></span></span></span></span></span></span></span></span><span><span><span><span><span><span><span><span><span><span><span>Genetic divergence among <i>Meimuna</i> species was larger on the continental islands that disconnected earlier, as was expected from the geological history of the islands. However, the pattern of intraspecific genetic differentiation differed between species within the same island region, possibly due to their ecological characteristics. In addition, colonisation of oceanic islands was achieved by long-distance (possibly wind-borne) dispersal from the continental islands. Thus, the formation of island cicada fauna was affected by islands' geological history and species' ecological characteristics, as well as accidental long-distance dispersal events. </span></span></span></span></span></span></span></span></span></span></span></p>
Phylogeography of Meimuna cicadas on continental and oceanic islands of Japan in the north-western Pacific region
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