
Catherine Reymonet : France : Peyrelevade : 19290 : 13/06/2023
Altitude : 801 m - Taille : --
Réf. : 324599
J'ai cherché un peu sur InfluentialPoints et le site de l'INRAE sans rien trouver de très convaincant.
Forum communautaire francophone des insectes et autres arthropodes
Animateurs : lauzette, guillaume
Il est dit aussi : "if it develops in mid summer, there are no cross-bands and the aphid is generally paler", celle de printemps et d'automne ayant des marques sombres. Ma bestiole est de juin, ce qui, sur le Plateau, est plus proche du printemps que de l'été.Note: Drepanosiphum platanoides is an incorrect, but commonly used, synonym for Drepanosiphum platanoidis.
Cette description correspond mieux à ma bestiole, puisque les barres sombres sont facultatives. La couleur des antennes correspond mieux aussi. Elle vit sur Acer pseudoplatanus.There are often one or two short brown bars on abdominal tergites 4-5 only, and usually a conspicuous brown-black spot in front of the base of each siphunculus (see second picture below). The siphunculi are only slightly swollen, and are either entirely or distally dark or black. The long antennae are pale but the segments have brownish tips.
Je suis donc d'accord avec la proposition de Ant1 : Drepanosiphum acerinum. Je vais valider comme très probable et on changera si ça ne colle pas, d'accord ?33 Forewing with a dusky patch at tip between ends of Rs and M1 (fig. 21A) => Drepanosiphum aceris
- Forewing sometimes with dusky spots at ends of veins, but not with pigment extending between vein endings .....34
34 SIPH tapering gradually from base to apex, rarely with any discernible swelling. Pterostigma of forewing with a characteristically shaped dark band, thickened near its proximal end (fig. 21B). ANT III with less than 12 rhinaria => Drepanosiphum braggii
- SIPH with at least a slight swelling of middle region. Pterostigma of forewing pale, or with either a uniformly thin dark band or a dark distal patch. ANT III usually with more than 12 rhinaria .....35
35 Dorsal abdomen with two broad, dark, transverse bands on segments 4 and 5, that on segment 5 extending laterally to almost touch the marginal sclerites in front of the SIPH (fig. 22A). Pterostigma with a small dark patch at its distal extremity. Often brachypterous or with short wings => Drepanosiphum dixoni
- Dorsal abdomen either without transverse bars or with more, shorter, bars not extending to marginal sclerites. Pterostigma without any distinct small dark patch. Always fully winged .....36
36 Fore femora more than 1.5× thicker than mid- and hind femora .....37
- Fore femora less than 1.5× thicker than mid- and hind femora, sometimes with a dark ventral stripe but this never very conspicuous. ANT III pale or dusky at base .....38
37 Fore femora with a very distinct broad black longitudinal ventral stripe (fig. 22C). ANT III with a short black contrasting section near base, as dark as the apex of the segment. R IV+V 0.5-0.8 × HT II => Drepanosiphum oregonensis
- Fore femora without a broad black longitudinal ventral stripe. ANT III uniformly pale. R IV+V 0.8-1.3 × HT II => Drepanosiphum latifemorum*
38 PT less than 0.7 ×ANT III, PT/BASE 6.0-7.0. R IV+V at least 0.14 mm.BL 3.1-4.3 mm. With or without a black patch in front of each SIPH .....39
- PT more than 0.7× ANT III, PT/BASE 7.5-12.0. R IV+V less than 0.14 mm. BL 2.1-3.3 mm. With a black patch in front of each SIPH .....40
39 Either with no dorsal or marginal abdominal markings (spring/summer) or with a series of brown-black transverse dorsal bars and marginal sclerites including a large black ante-siphuncular sclerite (autumn) => Drepanosiphum platanoidis
- Always with a single black sclerite just in front of each SIPH, even in specimens without dorsal abdominal bars (fig. 22B) => Drepanosiphum iranicum
40 SIPH with conspicuously dark tips, even in very pale specimens, and often wholly dusky or dark. ANT III with 9-15 rhinaria => Drepanosiphum acerinum
- SIPH usually pale, without conspicuously dark tips. ANT III with 15-26 rhinaria => Drepanosiphum caucasicum