Fig. 2From: Aspistor verumquadriscutis, a new fossil species of sea catfishes (Siluriformes; Ariidae) from the upper Miocene of VenezuelaStratigraphic section of the Urumaco Formation, Northwestern Venezuela (modified from Quiroz and Jaramillo 2010). C clay, S silt, Vf very fine sand, M medium sand, Vc very coarse sandBack to article page