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Altica aenescens |
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Distribution: Worldwide.
Statistics: One of the largest genera of Alticinae with
more than 300 species, Palearctic about 80 species.
Host Plants: Betula,
Calluna, Carduus, Cirsium, Cornus, Corylus, Empetrum,
Epilobium, Erica, Eupatorium, Fragaria, Geranium,
Glycyrrhiza, Lythrum, Oenothera, Populus, Potentilla,
Quercus, Rhododendron, Rosa, Salix, Sanguisorba,
Tamarix, Vitis (Medvedev & Roginskaya 1988).
Comments: According to Opinion 1754 of the Commission
of Zoological Nomenclature (Bull. Zool. Nom. 1994) the author of
the genus Altica is Geoffroy, and the date is 1762.
Unfortunately LeSage (1995) has failed to correct the authorship
in his recent work and still cites Müller as the author of
the genus.
Diagnosis: Body medium sized to
large, more or less flat. Color metallic blue, green or
violet, sometimes with reddish or bronze lustre.
Head oval, convex from lateral view. Frontal ridge
usually narrow and long, forming slightly elevated, angular
T-shaped ridge with anterior margin of head capsule. Antennal
calli raised, contiguous, oval, well delimited from frontal ridge
laterally and from each other by furrows. Furrows delineating
antennal calli from vertex sometimes very indistinct. Orbital
line present. Interantennal space slightly wider than diameter of
antennal socket, but narrower than transverse diameter of eye.
Eye usually small. Clypeus long, labrum typical. Antenna 11
segmented, filiform.
Pronotum more or less narrow, with antebasal
transverse impression. Procoxal cavity open behind. Intercoxal
prosternal process comparatively narrow. Mesosternum wide.
Elytra oval, more or less flat, with well developed
humeral calli. Elytral punctures irregularly placed. Epipleuron
wide across humeral callus, not reaching posterolateral elytral
margin.
Metafemur typical. Metatibia cylindrical, with low
longitudinal ridge on dorsal side, apically flat and thickened.
Metatarsus inserted apically. First metatarsal segment longer
than two but shorter than following three segments combined.