Forum Entomologi Italiani

Ciao,
# 2188 captured at an altitude of about 950 m. in Cne : Le-Petit-Abergement (Dépt. Ain - France) - 25 VII 1987
Can you identify this Coleoptera and what is its sex ?
Thank you by advance.
Saluti.

D & JP Balmer

I think female of Acilius canaliculatus (Dytiscidae).

Ciao

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Giacomo

Non ne sono proprio sicuro, per me si tratta di una femmina di Acilius sulcatus.
Una foto del lato ventrale può togliere ogni dubbio

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Marcello Romano

Ciao,
Thank you for your answers to both.
I unite the ventral photo of this insect, but the photo is not good because I have not the lighting necessary !
Saluti.

D & JP Balmer

La foto va benissimo
Confermo Acilius sulcatus (Linnaeus, 1758), femmina (vedi questa discussione)

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Marcello Romano

Ciao,

Thank you for this confirmation.

I went to see your superb : Indice "Sezione sistematica » Coleoptera » Caraboidea » Dytiscidae.
I thus supplement the place of capture : In a cold Forest with majority coniferous trees, in a pond of 3/4 m2 (permanent ?) that I saw each year during 3 years. The Forest does not have any marshy zone.

Saluti.

D & JP Balmer

I have the both species in my collection, unfortunately only 2 males of A. canaliculatus. In A. canaliculatus the almost entire metatibia is white yellow and each sternit has a transversal white stripe, not only 2 lateral spots.

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Ciao
Adrian