sentences:  "P. vittatus" is a fairly large poison frog, reaching a length of 3.5 cm in adulthood, with females typically being larger than males.They are more smooth-bodied than other species of the genus, having almost perfectly sloping backs.Unlike the related "P. bicolor" and "P. terribilis", their shoulder blades are usually not visible beneath their skin, giving the frogs the appearance of being overweight.