The Silverstone’s poison frog’s head is generally as wide as the body and is characterized with a sloping and rounded snout.
The Silverstone’s poison frog’s head is characterized with a sloping and rounded snout that is lateral in profile and truncates to bluntly rounded in dorsal or ventral aspect.
The head is generally as wide as the body, except gravid females tend to be more rotund. When described, head width averaged 99 percent of the greatest body width in 12 males (range 87-115%) and 88 percent in six females (78-118%).
The widest part of the head is between the jaw articulations.
The nares are situated toward the tip of the snout and are directed posterolaterally. Both nares are visible from the front and from below but not visible from above, although nareal bulges cause the truncated aspect of the snout in dorsal (and ventral) view.
The canthus rostralis is rounded and the loreal region is vertical and very slightly concave. The interorbital area is wider than the upper eyelid.