This species was first described in 1824 by
Ernst Friedrich Germar under the name
Cryptorhynchus echinatus. The
type locality was indicated as "
Carniolia", in the present-day
Slovenia.
Acalles echinatus, together with nine other species, forms the
echinatus group within the genus
Acalles, characterized by a triangular shape
edeagusa.
Sibling species for
A. echinatus are
Acalles fallax and
Acalles petryszaki. ==References==