General morphology of species of the northern (a–c, g) and southern (d–f, h) clades of the Hyloscirtus larinopygion species group. Red arrows in a and c show non-hypertrophied forearms, while d and f show hypertrophied forearms. Green arrow in b shows prepollex hidden under thenar tubercle, while e shows prepollex protruding in a prepollical spine. Blue arrows in g show dentigerous processes of vomer slightly separated with numerous vomerine teeth, while h show dentigerous processes of vomer notoriously separated with few vomerine teeth. Illustrations by José M. Falcón-Reibán and Juan C. Sánchez-Nivicela.