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2002 by the American Society of Ichthyologists and Herpetologists Copeia, 2002(4), pp. 10571062
 

Summary: 2002 by the American Society of Ichthyologists and Herpetologists
Copeia, 2002(4), pp. 1057­1062
New Dwarf Species of Mantidactylus from Northwestern Madagascar
(Anura: Mantellidae)
MIGUEL VENCES, FRANCO ANDREONE, FRANK GLAW, AND FABIO MATTIOLI
A new frog species of the genus Mantidactylus is described from the lowland areas
of northwestern Madagascar known as the Sambirano Region. Mantidactylus madi-
nika reaches 11­13 mm snout­vent length in males and 15­16 mm in females and
is thereby the smallest species in the family Mantellidae. It is included in the sub-
genus Blommersia based on external morphology but differs from other species of
the subgenus by its relative finger length. Several features of the new species (only
slightly bifid tongue, absence of vomerine teeth, reduction of maxillary teeth, ab-
sence of dark pigment on oocytes) are similar to the states observed in the genus
Mantella, which is known to be phylogenetically nested within the paraphyletic Man-
tidactylus. Miniaturization in the ancestor of Mantella may explain several of the
derived character states in this genus.
MINIATURIZATION of body size is a wide-
spread phenomenon in animals (Han-
ken and Wake, 1993). In frogs, it evolved several
times convergently in tropical environments

  

Source: Andreone, Franco - Zoology Department, Museo Regionale di Scienze Naturali di Torino
Vences, Miguel - Institute for Biodiversity and Ecosystem Dynamics, Zoological Museum, Universiteit van Amsterdam

 

Collections: Biology and Medicine; Environmental Sciences and Ecology