Agrilus cyanescens
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publication ID |
https://doi.org/ 10.5281/zenodo.274997 |
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DOI |
https://doi.org/10.5281/zenodo.6224700 |
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persistent identifier |
https://treatment.plazi.org/id/CE492159-C975-044F-64D2-FDF4FD4AFA55 |
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treatment provided by |
Plazi |
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scientific name |
Agrilus cyanescens |
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Agrilus cyanescens View in CoL species-group
Diagnosis. Robust, medium sized, blue, green or bronze beetles without distinct ornamental pubescence. Pronotal disk variously depressed laterally; prehumerus absent or represented by elongate protuberance. Elytral apices separately arcuate. The group is further characterized by having a peculiar form of sexual dimorphism in size and form of prosternal lobe, shape of metacoxal plates, impression of basal ventrite and emargination of apical ventrite ( Fig. 33 View FIGURES 33 – 41. A ). Males differ from females by having prosternal lobe more robust and more deeply emarginated medially, with sides of emargination often spiniform (Figs. 25–32). Metacoxal plates in males protrude sharply (except of A. bidentulus ) ( Figs. 35–41 View FIGURES 33 – 41. A ), basal ventrite is usually distinctly subtriangularly impressed between metacoxae ( Fig. 33 View FIGURES 33 – 41. A ), and apex of the last ventrite is deeply emarginated ( Fig. 33 View FIGURES 33 – 41. A ). Members of the A. cyanescens species-group do not demonstrate distinct sexual differences in the pubescence of dorsal side between male and female, unlike in other Agrilus species with documented sexual dimorphism. The aedeagus is rather uniform externally ( Fig. 34 View FIGURES 33 – 41. A ) with its median lobe variously shaped ( Figs. 9–17 View FIGURES 9 – 17 ).
Members of the A. cyanescens species-group as presently defined are most similar to the bluish metallic species from the Oriental and southern Palaearctic (Yunnan) regions preliminary and informally termed as A. laetecyanescens species-group. Similar to the A. cyanescens species-group, males of this assemblage also have a markedly enlarged prosternal lobe, lack pubescence on the ventral side of the body, and both sexes have a medial emargination on the apical abdominal ventrite.
Composition and distribution. As presently defined, the group comprises seven species and one subspecies with the majority of species distributed in the eastern part of the Palaearctic region. One widely distributed species ( A. cyanescens ) occurs through most of Europe and recently became introduced to, and successfully established in, the North America.
No known copyright restrictions apply. See Agosti, D., Egloff, W., 2009. Taxonomic information exchange and copyright: the Plazi approach. BMC Research Notes 2009, 2:53 for further explanation.