Carl August Graf Attems-Petzenstein (13 October 1868 in Graz, Austria – 19 April 1952 in Vienna) was an Austrian myriapodologist and invertebrate zoologist.

During his further studies he spent a lot of time examining the myriapod collection of the Viennese Hofmuseum (today's Naturhistorisches Museum).

The resulting publication was named "Myriopoden von Kreta, nebst Beiträgen zur allgemeinen Kenntnis einiger Gattungen."

In between Attems was appointed curator of the Evertebrata-Varia collection and spent the summer of 1911 in Roscoff, France, studying polychaetes.

Befriended scientist Karl Wilhelm Verhoeff dedicated him several genus (Attemsia Verh., Attemsocyphus Verh., Attemsodesmus R. F. Lawrence).