Sottyxerxes

The genus was originally described and named by Schram et al. in 1982 with two species: S. multiplex from the Stephanian Montceau-les-Mines lagerstätte and S. pieckoae from the Westphalian Mazon Creek. S. multiplex was described on the basis of 11 specimens. In 2008, Racheboeuf et al. redescribed the species with 49 new specimens, including some three-dimensionally preserved fossils. The genus name honours the Sotty family, prominent collectors of Montceau-les-Mines fossils. The specific name multiplex comes from Latin and means "manifold" or "multiple", referring to the numerous diplosegments. == Description ==

The total body length reaches about . The head is rounded, long, and is composed of two sclerites: the anterior cephalic tergite and the larger posterior cephalic tergite. The ventral face of the cephalic region carries two unpaired convex plates, which might represent the labrum identified in other euthycarcinoids. There are 14 preabdominal tergites and six postabdominal somites. The body is terminated by a pointed telson. == Ecology ==

n Alanops on the right, the lobopodian Palaeocampa in the middle, and three Sottyxerxes around Palaeocampa. The Montceau-les-Mines lagerstätte is widely accepted to have been a freshwater intermontane environment. Sottyxerxes has no setae, subtriangular podomeres, and shows no swimming adaptations, which suggests that it simply walked along the bottom. It lived alongside the other euthycarcinoid Schramixerxes gerem. == References ==