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Moin Jürgen,

ich sehe hier auch eine A. roselii. Die kommen auch an anderen Laubgehölzen vor, aber bevorzugt eben auf Erlen und auch vereinzelt Platanen. Aber das weißt du ja. Habe dein Bild deinem Bild etwas mehr Licht gegeben, so erkennt man mehr Details. Interessantes PDF dazu, mit Unterscheidungsmerkmalen https://www.zobodat.at/pdf/Heteropteron_26_0024-0029.pdf. Aber sicher ist hier nichts ohne Unterseite.

Gruß, Volker

Hello Jürgen,

I also agree with roeselii. I have alot of experience with what is supposed to be longiceps and i do not see a match with longiceps. For one thing, the pronotum of longiceps is most often very pale and it has black/dark colored punctures. The dark area on the corium is less intense or "indistinct". I have dissected two longiceps males that were dead on my window and the genitalia matches what is called longiceps. I have found them under bark of platanus trees here in Berlin every winter or more specifically January. It is to be noted that longicpes is questionable as a species since dna cannot yet separate it from roeselii but the genitalia do look slightly different. As far as i can see, the species in your photo is a perfect match to the current description of roeselii. I prefer to treat longiceps as an intraspecific variation and label it as Arocatus roeselii var longiceps.

Best wishes,
John