Skull shape variation in the Armored Sailfin catfish, Pterygoplichthys disjunctivus (Siluriformes: Loricariidae), described using geometric morphometrics Journal title: Journal of Biodiversity and Environmental Sciences (JBES) Authors: Mark Anthony J. Torres, Jan Deo B. Moldez, Cordulo P. AscaƱo Subject(s): Biological Sciences, Environmental Sciences, Biology