Actenicerus siaelandicus is a species of click beetle belonging to the family Elateridae, subfamily Dendrometrinae.
This beetle is present in most of Europe, in the East Palearctic realm and in the Nearctic realm.
The adults grow up to long and can mostly be encountered from May through August, mainly in wet meadows, bogs and marshes. One of preferred host-plants are Carex species.
The whole body is bronzed-brownish or auburn-purplish, with a greyish pubescence.