Kinyongia matschiei, common name giant monkey-tailed east Usambara two-horned chameleon, giant east Usambara blade-horned chameleon, and Matschie's two-horned chameleon, is a species of chameleon from the East Usambara Mountains in Tanzania. It was formerly confused with K. fischeri, which is not found in the range of K. matschiei.[1]
K. matschiei is the largest species in the genus Kinyongia at up to in total length, although the female remains smaller than the male at up to . The adult male has a long pair of "horns" on the nose, which can be parallel or divergent; they are much smaller in the female.[1]
This species lives only at altitudes of up to over a total of of isolated Afrotemperate forest areas in the East Usambara Mountains of Tanzania. The actual area of occupancy, however, is under . Its numbers are declining. Although sometimes found in degraded habitats near forest, it is not found in fully transformed areas such as plantations. The related K. vosseleri occurs in the same range as K. matschiei, while K. multituberculata is found in the West Usambaras.[1]