Kräusel (1928) cited this paper as Gothan (1908). "Über einige von Dr. Lotz .in Deutsch-Südwestafrika ge sammelte fossile Jiölzer (V. M.). Mon.-Bcr. Dtsch. Oeol. Ges. 1908." But in that paper Dadoxylon perforatum is not described, and I could not find any paper of Gothan describing that species.