Ivan Nunes
Federal University of Rio de Janeiro
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Publication
Featured researches published by Ivan Nunes.
South American Journal of Herpetology | 2007
Ivan Nunes; Roseane Sampaio Santiago; Flora Acuña Juncá
Abstract We describe the advertisement calls of Dendropsophus branneri, Phyllodytes melanomystax, and Scinax agilis, and present new information on the advertisement call of Scinax auratus. We also describe the territorial call of P. melanomystax. We provide the power spectrums, audiospectrograms, and waveforms of all calls. Vocalizations were recorded in the Municipalities of Camaçari, Elísio Medrado, Feira de Santana, and Mata de São João, State of Bahia, Brazil. Based on the advertisement call characteristics of these species, we discuss some aspects related to their taxonomy.
Copeia | 2012
Ivan Nunes; Axel Kwet; José P. Pombal
Scinax alter, a taxon belonging to the S. ruber clade, has been previously suggested to represent a species complex. We analyzed variation among populations of Scinax alter using advertisement calls, dorsal color pattern, and external morphology. We identified three diagnosable groups distributed throughout the Atlantic Forest of eastern Brazil, which differ mainly in the advertisement call, dorsal drawing pattern, snout–vent length, and presence of tubercles on tarsus. Scinax alter was restricted to populations from south of Bahia State to Rio de Janeiro State, and two new species were related to the southern populations: Scinax imbegue, from Parque das Nascentes, Municipality of Blumenau (27°03′S, 49°05′W, 412 m a.s.l.), Santa Catarina State, Brazil, and Scinax tymbamirim, from Córrego Grande (27°35′S, 48°31′W, at sea level), Municipality of Florianópolis, Santa Catarina State, Brazil.
Herpetologica | 2011
Ivan Nunes; José P. Pombal
Abstract: A new species of Scinax is described from open formations of the coastal plains (Restingas) within the Tropical Atlantic Domain in northeastern Brazil. The new species most resembles S. auratus (Wied-Neuwied) and S. juncae Nunes and Pombal, and is diagnosed by the dorsal pattern of dorsolateral white stripes in dark-brown background, interocular white transversal stripe, and small scattered white blotches; snout rounded in dorsal view and profile; dorsal skin smooth; vocal sac smooth; presence of a few tubercles in a longitudinal way from the internal metatarsal tubercle to the heel; advertisement call with 7–8 notes; call dominant frequency 1.38 kHz. This new species can be easily distinguished from S. auratus and S. juncae by the different dorsal pattern, morphological traits, and advertisement call.
Amphibia-reptilia | 2010
Ivan Nunes; José P. Pombal
A new species of Scinax from the lowlands of the Atlantic Rain Forest remains in the southern region of the State of Bahia, North-eastern Brazil, similar to the S. auratus Wied-Neuwied, is described. This species is characterized by the following combination of characters: moderate size (males 23.0-27.1 mm SVL); snout rounded in dorsal view; dorsal colour pattern with dorsolateral yellowish stripe above greenish-brown background, with an interocular yellow transversal bar; vocal sac smooth; presence of a tubercle and dermal fold on tarsus advertisement call with four to five notes; call duration 0.17-0.24 s, dominant frequency 2.07-3.79 kHz. The advertisement call description and informations on natural history are provided.
Herpetologica | 2015
Flora Acuña Juncá; Marcelo Felgueiras Napoli; Ivan Nunes; Ednei De Almeida Mercês; Rafael Oliveira de Abreu
Abstract: A new species belonging to the Scinax ruber clade, morphologically similar to S. cabralensis and S. rupestris, is described from the Municipality of Miguel Calmon, State of Bahia, northeastern Brazil. This locality belongs to the northern portion of the Espinhaço Range known as Chapada Diamantina, a semiarid region in central Bahia State. The new species can be distinguished from all congeners of the S. ruber clade by a combination of adult (size, morphology, color pattern, and advertisement call) as well as larval (external morphology, and oral cavity) characteristics. The description of this frog adds another species, and the first of the S. ruber clade, to those that are endemic to Chapada Diamantina.
South American Journal of Herpetology | 2012
Carlos Alberto Gonçalves Cruz; Ivan Nunes; Flora Acuña Juncá
ABSTRACT. We redescribe Proceratophrys cristiceps and describe two new allied species, constituting the northernmost record of that group for the Atlantic Forest remnants. In addition to the morphometric differences, the characteristics of size, snout shape, head width, tympanum, interocular transverse crest of tubercles, canthal crest, frontoparietal crest, outer metacarpal tubercle, webbing formulae, inner metacarpal tubercle, and blotches on venter, were used to diagnose the species. The distribution of P. cristiceps is restricted to eastern Brasil, from the state of Rio Grande do Norte to the state of Bahia, and both new species are only known from the type locality in the state of Ceará.
Zootaxa | 2013
Renata Cecília Amaro; Ivan Nunes; Clarissa Canedo; Marcelo Felgueiras Napoli; Flora Acuña Juncá; Vanessa Kruth Verdade; Célio F. B. Haddad; Miguel Trefaut Rodrigues
The taxonomic and biogeographic affinities of Strabomantis aramunha from the Campos Rupestres of Brazil are intriguing. A unique skull morphology of females suggest affinities with the broad-headed eleutherodactylines of Northwestern South America in the genus Strabomantis. Male and juvenile morphology nonetheless suggest S. aramunha could be related to members of the recently described genus Haddadus from eastern Brazil. We assess the affinities of S. aramunha using molecular phylogenetic analyses of mitochondrial (12S, tRNAval, 16S, cyt b) and nuclear sequences (RAG-1and rhodopsin). Bayesian inference, likelihood, and parsimony analysis recover a highly supported clade with S. aramunha and H. binotatus as sister taxa. Accordingly, we transfer S. aramunha to Haddadus, and provide a new generic definition of the later. The distribution of species in Haddadus (highlands of the Espinhaço mountain Range and coastal eastern Brazil) is now concordant with the general pattern observed for other species in the area.
Herpetologica | 2013
Marcelo Gordo; Luís Felipe Toledo; Pablo Suárez; Ricardo A. Kawashita-Ribeiro; Robson W. Ávila; Drausio Honorio Morais; Ivan Nunes
Abstract: We describe a new species of Trachycephalus from the Amazon Rain Forest, which is morphologically similar to T. resinifictrix (Goeldi). This new species is characterized by a medium body size for species in the genus (males snout–vent length [SVL] 57.9–74.3 mm, females SVL 74.4–84.9 mm); skin of the head not co-ossified with underlying dermal bones; dorsal skin texture, including that of the head, densely glandulous with several tubercles; paired vocal sac that protrudes at a posterior angle to the jaw when inflated; iris coloration pinkish-beige with a horizontal black bar and a vertical thin black line below the pupil; dorsal color pattern consisting of a wide interocular whitish-beige and a dark blotch on the middle of the dorsum joining the crossbar at the top of the dorsum, forming a “T” shape; rounded snout in dorsal view, and rounded or acuminate in profile; well-developed supratympanic fold; ulnar tubercles present, sometimes associated with ulnar fold; well-developed axillary membrane; well-developed tarsal fold; males with nonhypertrophied forearm; minimum frequencies of the advertisement call lower than 0.38 kHz; pulse rate 126.7–146.6 pulses/s; tadpole external coloration with brown reticulated blotches in the superior portion of the fin; tooth row formulae 2(2)/4. The new species, which is widely distributed in the Amazonian Forest, has been confused with the parapatric T. resinifictrix. It is a canopy treefrog that breeds in tree-holes that have accumulated rainwater.
South American Journal of Herpetology | 2007
Ivan Nunes; Luciana Ardenghi Fusinatto; Carlos Alberto Gonçalves Cruz
Abstract The tadpole of Sphaenorhynchus palustris is described and illustrated from Municipality of Porto Seguro, State of Bahia, Brazil. Sphaenorhynchus tadpoles are very similar, however the tadpole of S. palustris is promptly distinguished from the other already described species by its very long spiracular tube. We also describe the advertisement call of S. palustris, from the same locality. It is a short trill, consisting of 1 to 3 pulsed notes; note duration varies from 0.01 to 0.05 s and note interval varies from 0.15 to 0.19 s; dominant frequency was about 2.62 ± 0.2 kHz. The Atlantic Rain Forest of the southern State of Bahia is one of the well-preserved areas remaining of this fragmented ecosystem; consequently it has unique value for amphibian conservation.
Copeia | 2013
Ivan Nunes; Pablo Suárez; Marcelo Gordo; P José PombalJr.
A new species of Trachycephalus from the Brazilian Amazon Rain Forest, morphologically similar to T. hadroceps (Duellman and Hoogmoed), is described. This new species is characterized by having the skin not co-ossified with the skull; skin on dorsum bearing many low and medium round tubercles; a vocal sac not externally visible; well-developed paratoid gland; snout rounded in profile; third finger disc almost the same size of the eye; absence of tarsal fold; iris pinkish-beige with a horizontal dark gray bar; dorsal color pattern in life light brownish-orange with scattered brown dots. Trachycephalus hadroceps is restricted to the left margin (north) of the Amazon River, in the Guiana Shield, and possibly in the adjacent Brazilian Amazon Rain Forest, and the new species occurs on the right margin (south) of the Amazon River. It is a canopy treefrog, which probably uses treeholes filled with water as breeding sites.