"one who carries a club," c.1600, from Latin claviger (an epithet of Hercules), from clava "club, knotty branch" + stem of gerere "to bear" (see gest).
Online Etymology Dictionary, © 2010 Douglas Harper
Examples from the Web for claviger
The Claviger testaceus is a small beetle, often met in the dwellings of ants.
All the species of Claviger are confined to Europe, chiefly to the south, but one species, Cl.The History of the European Fauna
R. F. Scharff
The art of domesticating the Claviger is a stage of civilisation reached by some tribes and not by others.
The genera Pselaphus and Claviger, akin to the above, contain little insects which live as parasites in the nests of ants.The Insect World