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Brusquetti F.,Paulista University | Brusquetti F.,Institute Investigacion Biologica del Paraguay | Jansen M.,Senckenberg Forschungsinstitut und Naturmuseum | Barrio-Amoros C.,Institute Biodiversidad Tropical | And 2 more authors.
Zoological Journal of the Linnean Society | Year: 2014

Scinax fuscomarginatus, Scinax parkeri, Scinax trilineatus, Scinax lutzorum, and Scinax pusillus are morphologically similar species with controversial taxonomy associated with open formations of South America east of the Andes. We used external morphology, advertisement call, and molecular sequences to assess the taxonomy of these species. Phylogenetic analysis of molecular data showed a well-supported monophyletic group divided into two main clades and several subclades. Specimens of Hyla madeirae (synonym of S.fuscomarginatus) and those from Serra do Cachimbo correspond to distinct subclades, whereas the currently valid species were grouped into a single clade. This clade showed a marked substructure, but concordance of the recognized species to subclades was limited, showing S.fuscomarginatus to be paraphyletic with respect to S.parkeri, S.trilineatus, S.lutzorum, and S.pusillus. The high intrapopulation and intraspecific variation found in morphological characters did not allow us to differentiate amongst the currently recognized species. Similarly, none of them was distinguishable by morphometric analysis or advertisement call. Based on multiple evidence, we propose the synonymy of S.parkeri, S.trilineatus, S.lutzorum, and S.pusillus with S.fuscomarginatus, the revalidation of H. madeirae, and describe the specimens from Serra do Cachimbo as a new species. © 2014 The Linnean Society of London. Source


Cacciali P.,Institute Investigacion Biologica del Paraguay | Cacciali P.,Senckenberg Forschungsinstitut und Naturmuseum | Cabral H.,Institute Investigacion Biologica del Paraguay
Basic and Applied Herpetology | Year: 2015

Chironius is a genus of slender snakes adapted to a diurnal and arboreal life style, and is distributed from Honduras to Uruguay inhabiting different environments. Five species are present in Paraguay: C. bicarinatus, C. exoletus, C. flavolineatus, C. maculoventris, and C. quadricarinatus. In this work, we provide data on distribution, coloration, and morphological variation of 20 Paraguayan specimens housed in scientific collections. Our results fit with known parameters for the species referred in literature. A conclusion of this work is that, based on distribution and ecological preferences of the species in the region, Paraguay is poorly sampled. Here we extend the known pholidosis range of ventral scale for females of C. bicarinatus (154-170), and for C. maculoventris (143-157 for females and 154-161 for males), and the range of subcaudal scales for males of C. maculoventris (90-125), and females of C. quadricarinatus (91-123). © Asociacion Herpetologica Espanola. All rights reserved. Source


Cabral H.,Asociacion Guyra Paraguay | Cabral H.,Institute Investigacion Biologica del Paraguay | Cacciali P.,Institute Investigacion Biologica del Paraguay | Cacciali P.,Senckenberg Forschungsinstitut und Naturmuseum
Herpetologica | Year: 2015

Phalotris is a genus of Neotropical snakes with secretive habits that is poorly represented in collections. We describe a new species of Phalotris belonging to the bilineatus group from near Filadelfia in the Dry Chaco of Paraguay. The new species differs from P. lemniscatus and P. spegazzinii by having wider white and black neck collars, a wider black transverse ring in the anal region, and different coloration of the black dorsolateral lines. It differs from P. multipunctatus in the presence of a caudal ring, wider white and black neck collars, and having the entire head black without white marks. In addition, the new species is the only member of the bilineatus group with the black ventral coloration reduced to scattered dots. The new species is described based on three road-killed specimens found since 1995. The new species is currently considered endemic to xerophytic areas of the Paraguayan Chaco. Five species of Phalotris are now known to occur in Paraguay. © 2015 The Herpetologists' League, Inc. Source


Cacciali P.,Para La Tierra | Cacciali P.,Institute Investigacion Biologica del Paraguay | Smith P.,Para La Tierra | Kallberg A.,Para La Tierra | And 2 more authors.
Check List | Year: 2013

The first Paraguayan records of the poorly known xenodontine snake Lygophis paucidens are reported. Two male specimens were collected in a mosaic habitat of Campo Sucio and Cerrado sensu stricto in the Reserva Natural Laguna Blanca, Departamento San Pedro. This is the first record of this species outside of Brazil. © 2013 Check List and Authors. Source


Brusquetti F.,Claro | Brusquetti F.,Institute Investigacion Biologica del Paraguay | Thome M.T.C.,Claro | Canedo C.,Federal University of Rio de Janeiro | And 2 more authors.
Herpetologica | Year: 2013

Here we describe a new species of the Ischnocnema parva species series from the Parque Estadual do Desengano, in the northern part of the State of Rio de Janeiro, Brazil. We use morphology and mtDNA sequences to allocate the new species into the I. parva species series. The new species is closely related to I. parva genetically and morphologically, from which it is diagnosable by (1) the presence of a well-developed calcar tubercle, (2) a reduced Toe I, (3) a deep V-shaped median slit on the dorsal surface of toe discs, and (4) externally indistinct tympanum and tympanic annulus. © 2013 by The Herpetologists' League, Inc. Source

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