This volume contains additions to volume 3 and volume 5 in this series.
In 21 papers – about 600 pages, more than 150 coloured photos – extant and fossil spiders (Araneae) of various families are treated. Numerous new taxa are described, identification keys to the West-Palaearctic genera of the Mygalomorpha as well as to several families of the Araneomorpha are given, e.g., Clubionidae, Gnaphosidae, Prodidomidae, and Zoridae (Liocranidae). Moreover events of wound repair/healing in extant and fossil spiders are reported, reversals in various structures of spiders are discussed, and conclusions on the evolution of higher spider taxa based on fossil spiders are drawn. Besides spiders in the ideology of two Creationists are treated.