Data from: Description and phylogenetic relationships of two new species of miniature Arthroleptis (Anura: Arthroleptidae) from the Eastern Arc Mountains of Tanzania

I describe two new species of squeaker frog (Arthroleptidae: Arthroleptis)
from the Eastern Arc Mountains of Tanzania. These new species are
distinguished from other miniature Arthroleptis in the Eastern Arc
Mountains by the combination of very small adult body size (< 15 mm
snout–vent length), a pronounced dark inguinal spot, and color patterns
unique to each species. The new species could be the smallest frog species
known from East Africa and among the smallest species of Arthroleptis. An
estimate of phylogeny on the basis of mitochondrial DNA sequences reveals
that these morphologically cryptic species are sister taxa that compose a
basal lineage within a clade of miniature Arthroleptis. Their description
hints at a diverse cryptic amphibian fauna in the Eastern Arc Mountains
that awaits additional discovery through molecular methods.