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Roura, French Guiana

Fouquet A.,University of Sao Paulo | Noonan B.P.,University of Mississippi | Michel Blanc,Pointe Maripa | Dill Orrico V.G.,Sao Paulo State University
Zootaxa | Year: 2011

Dendropsophus gaucheri is a recently described species which inhabits open areas of the eastern part of the Guiana Shield and is currently assigned to the D. parviceps species group based on the presence of a subocular cream spot. Herein we investigate its phylogenetic position including material from the type locality and newly documented populations from Suriname and Brazil based on mtDNA sequences. The species, as well as D. riveroi which is assigned to the D. minimus species group, were recovered nested within the D. microcephalus species group which implies the paraphyly of the three Dendropsophus species groups. Such result, along with other evidences, highlights the need for a thorough revision of the genus. The genetic distances among D. gaucheri samples studied are low confirming their conspecificity and suggesting recent connections among populations from open areas currently isolated by rainforest in the lowlands of the Guiana Shield. Copyright © 2011 ·Magnolia Press.

Fouquet A.,CNRS Guyane USR3456 | Orrico V.G.D.,University Estadual Of Santa Cruz | Ernst R.,Museum of Zoology | Blanc M.,Pointe Maripa | And 6 more authors.
Zootaxa | Year: 2015

Many Amazonian frog species that are considered widely distributed may actually represent polyspecific complexes.. A minute tree frog from the Guiana Shield originally assigned to the allegedly widely distributed Dendropsophus brevifrons proved to be a yet undescribed species within the D. parviceps group. We herein describe this new species and present a phylogeny for the D. parviceps group. The new species is diagnosed from other Dendropsophus of the parviceps group by its small body size (19.6-21.7 mm in males, 22.1-24.5 mm in females), thighs dorsally dark grey with cream blotches without bright yellow patch, absence of dorsolateral and canthal stripe, and an advertisement call comprising trills (length 0.30-0.35 s) composed of notes emitted at a rate of 131-144 notes/s, generally followed by click series of 2-3 notes. Its tadpole is also singular by having fused lateral marginal papillae and absence of both labial teeth and submarginal papillae. Genetic distances (p-distance) are >5.3% on the 12S and >9.3% on the 16S from D. brevifrons, its closest relative. This species occurs from the Brazilian state of Amapá, across French Guiana and Suriname to central Guyana and is likely to also occur in adjacent Brazilian states and eastern Venezuela. This species is not rare but is difficult to collect because of its arboreal habits and seasonal activity peaks. © 2015 Magnolia Press.

Fouquet A.,CNRS Guyane USR3456 | Martinez Q.,CNRS Guyane USR3456 | Courtois E.A.,CNRS Guyane USR3456 | Dewynter M.,Biotope | And 6 more authors.
Zootaxa | Year: 2013

We describe a new Pristimantis from French Guiana, northern South America, which is mainly distinguished from known phenotypically related congeners (i.e. species from the polyphyletic unistrigatus species group) occurring at low and middle elevations in the Guiana Shield by the combination of a distinct tympanum, a lower ratio of tibia vs. hand length, a reddish groin region, and a distinct advertisement call consisting of clusters of generally four short notes. The new species inhabits pristine primary forests on the slopes of isolated massifs reaching more than 400 m elevation, and seems not to occur below ca. 200 m above sea level. Such a sharp altitudinal limit suggests a strong influence of thermal variation on the distribution of the species, and therefore a potential sensitivity to climate change. With only nine isolated populations documented so far, the new species should be prioritized for conservation. Historical climate fluctuations during the Quaternary are likely responsible for the distribution pattern of the new species. © 2013 Magnolia Press.

Castroviejo-Fisher S.,American Museum of Natural History | Vila C.,CSIC - Donana Biological Station | Ayarzaguena J.,Amigos y Amigos | Blanc M.,Pointe Maripa | And 2 more authors.
Zootaxa | Year: 2011

Basic information about the taxonomy, biology and distribution of Hyalinobatrachium glassfrogs of the Guiana Shield (GS) is scarce, ambiguous, and in many cases even contradictory. In this review we aim to clarify the current taxonomic status of this group by means of phenotypic (morphology, morphometrics and bioacoustics) and molecular (mitochondrial DNA sequences) comparisons. Eight species have previously been recognized for the GS: H. crurifasciatum, H. eccentri-cum, H. fleischmanni (initially described as Hylella cappellei in the GS), H. iaspidiense (with the putative synonym H. nouraguense), H. ignioculus, H. mesai, H. mondolfii, and H. taylori. Our data support the resurrection of H . cappellei from its synonymy with H. fleischmanni. Hyalinobatrachium crurifasciatum, H. eccentricum, and H. ignioculus are pro-posed as junior synonyms of H. cappellei. We show that none of the four paratypes of H. taylori belong to this species and we assign two to H. cappellei and two to H. mondolfii. Additional specimens previously identified as H. taylori are reas-signed to H. cappellei, and hence H. taylori is redefined. Hyalinobatrachium nouraguense is confirmed as a junior synonym of H. iaspidiense. We also describe two new species of Hyalinobatrachium from French Guiana: Hyalinobatrachium kawense sp. nov. and Hyalinobatrachium tricolor sp. nov. In addition, and in concordance with the new taxonomic rearrangements, we provide diagnostic characters for all species, known distributions and main sources of references for their biology. We also report new distribution records for H. iaspidiense and H. mondolfii, and describe the formerly unknown tadpole of the later. Consequently, we recognize seven species of Hyalinobatrachium for the Guiana Shield: H. cappellei, H. iaspidiense, H. kawense sp. nov., H. mesai, H. mondolfii, H. taylori, and H. tricolor sp. nov. We discuss the suitability of integrative taxonomy as an approach to identify taxonomic uncertainty and consider its signifi-cance for conservation purposes. We also address the implications of our results to understand phylogeographic patterns in this area. Copyright © 2011 · Magnolia Press.

Fouquet A.,University of Sao Paulo | Dewynter M.,ONF | Gaucher P.,CNRS Guyane UPS 2561 | Blanc M.,Pointe Maripa | And 3 more authors.
Check List | Year: 2011

Here we report new distributional data for Adenomera heyeri, a recently described species of the lowlands of the Guiana Shield. We compiled available and new occurrence data as well as the absence of records from field surveys that were undertaken in the Guiana Shield in order to evaluate the actual range of the species. We confirm that A. heyeri is potentially distributed over most forested part of the northern Guiana Shield lowlands. The pattern of distribution also reveals valuable information on the ecology of the species. © 2011 Check List and Authors.

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