Plethodontohyla guentheri , a new montane microhylid frog species from northeastern Madagascar

We describe a new microhylid frog (subfamily Cophylinae) from a high elevational habitat of the Marojejy National Park in northeastern Madagascar, based on a single specimen. Plethodontohyla guentheri sp. n. has enlarged terminal discs on fingers and toes, greenish dorsal coloration, a distinct border between its dorsal and lateral colours, and a pointed snout. The new species has obvious relationships to the other Plethodontohyla species with enlarged fingertips ( P. inguinalis, P. notosticta, P. mihanika ) but differs from these by hand morphology, body size, coloration, and genetic traits. We discuss the unusual greenish dorsal colours of P. guentheri and its diurnal activity as possible adaptations to montane habitats and consider the conservation status of this poorly known new species as “data deficient”. Furthermore, a lectotype of Mantipus pulcher Ahl, 1929, a junior synonym of P. notosticta (Günther, 1877), is designated. (© 2007 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)