The 3rd edition of Glaw and Vences say that this species has been found "only in highly degraded areas where it occurs in flooded swamp areas (near Toamasina) or a small source (Maroantsetra) flowing through forest remnants". The ones photographed here are from small streams in an area of mostly undegraded forest in Masoala National Park, so maybe this was something of a minor discovery. The white spots on the snout are diagnostic of Mantidactylus betsileanus and its close relatives, so I was pretty certain that I had gotten the identification correct.
After Mark Scherz et al described M. jonasi along with many other new species in this genus in 2022, Dr. Scherz identified one of my photos as M. jonasi on iNaturalist. So now I'm even more certain that I had the right ID.
Here is a list of all the reptiles and frogs I saw on this trip to Madagascar.
- Mark D. Scherz, Angelica Crottini, Carl R. Hutter, Andrea Hildenbrand, Franco Andreone, Thio Rosin Fulgence, Gunther Köhler, Serge Herilalandriantsoa, Annemarie Ohler, Michaela Preick, Andolalao Rakotoarison, Loïs Rancilhac, Achille P. Raselimanana, Jana C. Riemann, Mark-Oliver Rödel, Gonçalo M. Rosa, Jeffrey W. Streicher, David R. Vieites, Jörn Köhler, Michael Hofreiter, Frank Glaw & Miguel Vences An inordinate fondness for inconspicuous brown frogs- integration of phylogenomics, archival DNA analysis, morphology, and bioacoustics yields 24 new taxa in the subgenus Brygoomantis (genus Mantidactylus) from Madagascar
- Glaw, F., Vences, M. 2007. A Field Guide to the Amphibians and Reptiles of Madagascar, Third Edition