The distinction between the three described species of Sculda from the Solnhofen Lithographic Limestones (cf. Tab. 1) is not clear and the validity of all these species is at best uncertain, based on our examination of a large number of specimens (part of them depicted in Figure 2). A large-scale taxonomic revision of the group is urgently necessary, but still under way. Therefore, all species names of the taxon Sculda - when referring to our material - are given with question marks. Sculda pennata Münster, 1840 and S. spinosa Kunth, 1870 have been described as differing in regard to rostrum shape and the number of dorsal teeth on the tergites [12]. Both structures are usually not preserved or at least hard to identify in ventral and lateral aspects. Differences in gross shape also have been used to distinguish between the two species, S. spinosa being said to be broader than S. pennata. Closer investigation of specimens in ventral aspect revealed that these differences might best be interpreted as the result of different degrees of telescoping of the body segments. At the moment we cannot distinguish between the two species, and we believe they might indeed be synonymous. To keep an open terminology, we refer to the specimens that might belong to one of the two species as ?Sculda pennata/spinosa.