LacusovagusLacusovagus is a genus of azhdarchoid pterodactyloid pterosaur from the Lower Cretaceous of Brazil.Discovery and namingIt is based on Staatliches [Museum für Naturkunde Karlsruhe|SMNK PAL] 4325, a partial upper jaw comprising sections of the skull in front of the eyes. This specimen was found in rocks of the Early Cretaceous-age Nova Olinda Member of the Crato Formation.DescriptionThe skull was long, and unusually wide. The section in front of the combined nasal-antorbital fenestra was relatively short. Also unusual was the combination of its toothless jaws and no bony head crest. Lacusovagus was described in 2008 by Mark Witton. The type species is L. magnificens, meaning "grand lake wanderer", in reference to its large size—it is currently the largest pterosaur known from the Crato Formation with an estimated wingspan of approximately and a body mass of.ClassificationLacusovagus shares many characteristics with the basal azhdarchoid family Chaoyangopteridae. Preliminary studies suggested it was a member of that clade, and a position within Chaoyangopteridae has been supported by numerous subsequent studies. However, alternative phylogenetic analyses have recovered it within the genus Tupuxuara, a member of the Thalassodromidae, or within Tapejaridae.