The monograph series of the ZFMK has been in publication since 1971, and was until 2012 / Volume 58 known under the name Bonner Zoologische Monographien (Bonn zoological Monographs), or BZM. In order to profit from the experience gained during the modernization of the journal series, the Bonn Zoological Bulletin, or BzB, monographs will now be published as a Supplementum series to the BzB. The Supplementum series will provide a publication outlet for articles that are too voluminous and 'monographical' in style to be printed in the BzB.