There are two recognized subspecies: The widespread nominate subspecies, Calumma p. parsonii, of both lowlands and mid-elevation altitudes, has no dorsal crest (no spines along the back's ridge) and reaches up to  in total length including tail; there are reports of individuals exceeding , but they remain unverified.
There exist two recognized subspecies: The widespread nominate subspecies, Calumma p. parsonii, inhabiting both lowlands and mid-elevation altitudes, lacks a dorsal crest (no spines along the back's ridge) and can grow up to  in total length including tail; there are reports of individuals exceeding , but these remain unverified.