Paulo Passos

Paulo Passos
Federal University of Rio de Janeiro | UFRJ · Departamento de Vertebrados

PhD

About

122
Publications
147,806
Reads
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2,517
Citations
Additional affiliations
May 2011 - present
Federal University of Rio de Janeiro
Position
  • Professor
May 2011 - present
Federal University of Rio de Janeiro
Position
  • Professor (Full)
Description
  • Curator of the Reptiles collections and advisor of graduated students in several zoological topics of research.
Education
August 2003 - February 2008
Federal University of Rio de Janeiro
Field of study
  • Systematic and Taxonomy of the snake genus Atractus

Publications

Publications (122)
Article
Full-text available
Abstract Atractus badius has a long and controversial nomenclatural history due to both its antiquity and the brevity of its original description. This species was described based on two syntypes from Java. Later, a lectotype was designated and the distribution range restricted to the Guiana Shield. Although this species has been repeatedly recorde...
Article
The extensive lack of knowledge on the morphological aspects of South American water-snakes, includes a poor understanding of phenotypic parameters, intraspecific variation, and conservation of the trans-Andean Helicops species, Helicops danieli Amaral, 1937. For the first time, we provide a multidisciplinary view using key features (e.g., morpholo...
Article
The threadsnakes of the family Leptotyphlopidae have been historically neglected in terms of their natural history, ecology, systematics, and morphology. Given the relevance of morphological data for resolving systematic, evolutionary , and functional issues, we aimed to provide a detailed comparative description of osteology and associated cartila...
Article
The genera Mitophis and Tetracheilostoma comprise two extant lineages of small‐sized threadsnakes that exclusively inhabit several islands of the West Indies. Even though leptotyphlopids are known for their extremely reduced size, miniaturization has only been hypothesized to reflect insular dwarfism for the genus Tetracheilostoma. Herein, we aim t...
Article
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Since the rearrangement of all leptotyphlopid species previously known as "Leptotyphlops" in Adalsteinsson et al. (2009)'s paper, several taxa have remained untested regarding their generic identity and have been assigned to different gen-era based on phenotypic data or, in some cases, without any clear justification. Most of the difficulties in as...
Article
Full-text available
There are currently 3,900 recognized, extant snake species belonging to 529 genera globally (Uetz et al. 2021; this study), making snakes one of the most diverse major groups of squamates. Of the 665 currently recognized species that were described between 2001 and 2020 (a ~17% increase in total species), ~34% of these (226 species) were described...
Article
Corallus hortulana presents a large array of tones and color pattern variability throughout its distribution (= polychromatism), which trigged the description of several taxa now considered to be primary synonyms. Linnaeus described two of these (Boa enydris and Boa hortulana) on the same page of the 10th Edition of the Systema Naturae. However, bo...
Article
We review the Atractus snethlageae species complex based on the examination of 330 specimens throughout its entire distribution, including its type series. We redefine A. snethlageae and recognize four new species previously assigned to it in the literature and natural history collections. Two of them are diagnosed through both phenotypic (meristic...
Article
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The treatment of diseases with animal resources or their derivatives is a traditional practice worldwide, representing a wide field of research for the elaboration of strategies of management and conservation of the fauna, and contributing to the search for sustainable therapy alternatives. This study presents the therapeutic applications of animal...
Article
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The distribution of the highly diversified and species-rich snake genus Atractus was assessed in search for endemism areas. The dataset of 6000 museum specimens was used to run an Endemicity Analyses in order to identify areas of biogeographic relevance for the genus Atractus . By using distinct methodological approaches and modifying the size and...
Article
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A reliable identification and delimitation of species is an essential prerequisite for many fields of science and conservation. The Neotropical herpetofauna is the world's most diverse, including many taxa of uncertain or debated taxonomy. Here we tackle one such species complex, by evaluating the taxonomic status of species currently allocated in...
Article
The Neotropics harbour a spectacular amount of biodiversity, but many of these species remain to be discovered and placed into the tree of life. In the neotropical snake genus Philodryas, the systematics of these rear-fanged snakes has been controversial and debated in recent years. Here, we combine published datasets with new morphological (scale...
Article
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We report on new voucher specimens of Epicrates cenchria to the meridional limits of its distribution in the Atlantic Forest. We provide data on the meristic, morphometric and hemipenial morphology features for this southernmost population. We review the recent published record of E. cenhria for the locality of Ipiguá, state of São Paulo, Brazil, a...
Article
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Pseudoautotomy is presumably a derived character within Lepidosauria and occurs in taxa that have lost the ability to perform autotomy. In general, species capable of employing pseudoautotomy as a defensive strategy against predators present a high frequency of damaged tails in series deposited in herpetological collections. We assessed data from t...
Article
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We describe a new species of snail-eating snake from two localities within the Atlantic Forest of the states of Bahia and Minas Gerais, Brazil. The new species differs remarkably from all congeners by its dorsal pattern consisting of sharply bordered triangles resembling the pattern of sympatric pitvipers, more precisely Bothrops jararaca and B. pi...
Article
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We assessed the current knowledge on non-avian reptile species composition in the state of Rio de Janeiro (RJ), southeastern Brazil. We used published data in indexed journals and verified voucher specimens housed in two herpetological collections of the Museu Nacional (UFRJ), and the Laboratory of Reptiles (ZUFRJ). We also confirmed vouchers from...
Article
Sexual dimorphism in snakes has been mainly evaluated for size and number of some morphological traits, but few studies address on sexual shape dimorphism. Here we evaluated the existence of sexual size and shape dimorphism in the semi-fossorial snake Atractus reticulatus. We use linear and geometric morphometrics to evaluate differences between se...
Article
Full-text available
Factors driving the spatial configuration of centres of endemism have long been a topic of broad interest and debate. Due to different eco‐evolutionary processes, these highly biodiverse areas may harbour different amounts of ancient and recently diverged organisms (paleo‐ and neo‐endemism, respectively). Patterns of endemism still need to be measu...
Article
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Accurate and detailed species distribution maps are fundamental for documenting and interpreting biological diversity. For snakes, an ecologically diverse group of reptiles, syntheses and detailed data on distribution patterns remain scarce. We present the first comprehensive collection of detailed, voucher-based, point-locality, range maps for all...
Article
The systematics of Leptotyphlopidae is historically controversial mostly due to their conserved external morphology in comparison with other snakes. However, recent studies have stressed that anatomical data might be informative for clarifying the leptotyphlopid taxonomy and evolution. We erect a new genus to accommodate Leptotyphlops collaris base...
Article
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We evaluated the taxonomic status of snakes from the Atractus emmeli species complex (composed by A. boettgeri, A. emmeli, A. paravertebralis, and A. taeniatus) on the basis of concordance between quantitative (meristics and morphometrics) and qualitative (pholidosis, color pattern, and hemipenis) analyses of morphological characters, in combinatio...
Poster
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O gênero Rhinoclemmys é composto por 9 espécies com hábitos desde estritamente aquáticos à terrícolas (Le & McCord, 2008), onde R. punctularia punctularia Daudin, 1801 é o único táxon atualmente reconhecido que ocorre no Brasil. Estudos acerca de descrição anatômica detalhada ainda são escassos ou ausentes para os representantes de Geoemydidae. Sen...
Article
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Studies on the cephalic myology of snakes provide a series of relevant data on their biology and systematics. Despite the great amount of descriptive studies currently available for the group, much of the knowledge remains obscure for most scolecophidian taxa. This study aimed to describe in detail the cephalic (head and neck) myology of members of...
Article
Full-text available
Studies on the cephalic myology of snakes provide a series of relevant data on their biology and systematics. Despite the great amount of descriptive studies currently available for the group, much of the knowledge remains obscure for most scolecophidian taxa. This study aimed to describe in detail the cephalic (head and neck) myology of members of...
Article
The Guiana Shield harbours one of the best preserved and largest extents of tropical forest on Earth and an immense biodiversity. The herpetofauna of this region remains poorly known. The species-rich snake genus Atractus contains ∼140 species, many with complicated taxonomic histories, including A. schach. Examination of specimens in museums and n...
Article
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We describe herein a new polychromatic species of the snake genus Atractus from the cloud forests of the northeastern Andes of Colombia. The new species is distinguished from all congeners by having an exclusive combination of phenotypic characters, such as: dorsal scale rows 17, loreal long, seven to ten maxillary teeth, ventrals 156–174 in female...
Article
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Body-size is significantly correlated with the number of vertebrae (pleomerism) in multiple vertebrate lineages, indicating that somitogenesis process is an important factor dictating evolutionary change associated to phyletic allometry and, consequently, species fitness and diversification. However, the role of the evolution of extreme body sizes...
Article
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Stability is an essential feature both to taxonomy and nomenclature. However, zoology is recently being flooded with countless proposals of taxonomic and/or nomenclatural changes, some of which may be considered premature when poorly supported or based upon overestimated hypotheses. We emphasize that the choice of not proposing nomenclatural and/or...
Chapter
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A avaliação dos répteis brasileiros foi coordenada pelo Centro Nacional de Pesquisa e Conservação de Répteis e Anfíbios (RAN), que avaliou todas as espécies continentais de Testudines (tartarugas, cágados e jabutis - 31 espécies), Crocodylia (jacarés - 6 espécies) e Squamata (lagartos, serpentes e anfisbênias - 690 espécies), e pelo Centro Nacional...
Article
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The subfamily Epictinae contains about 75 currently recognized species of strictly fossorial snakes distributed along the Neotropics (subtribe Renina) and Equatorial Africa (subtribe Rhinoleptini). Although several studies have addressed some internal phenotypic characters complexes for the taxa included in this subfamily, most of the available dat...
Article
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The Convention on Biological Diversity (CBD) commits its 196 nation parties to conserve biological diversity, use its components sustainably, and share fairly and equitably the benefits from the utilization of genetic resources. The last of these objectives was further codified in the Convention's Nagoya Protocol (NP), which came into effect in 201...
Article
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The genus Atractus Wagler 1828 comprises almost 150 currently recognized species of cryptozoic snakes widespread in the Neotropics, occurring from Panama to northeastern Argentina (Passos et al. 2016a). Despite the publication of the descriptions of several new species within the last decade, the taxonomy of the genus is unclear in some instances....
Article
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Beginning in November 2018, Brazilian legislation regulating access to genetic heritage and associated traditional knowledge will cause a bureaucratic collapse of Biodiversity research in Brazil. Law number 13.123/2015 and Decree 8772/2016 impose severe barriers to basic and applied research, and to international cooperation by introducing mandator...
Article
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We reassessed the taxonomic status of the species in the Atractus collaris complex (A. alphonsehogei, A. collaris, A. limitaneus, and A. gaigeae) on the basis of congruence between quantitative and qualitative morphological characters (meristic, morphometric, color pattern, hemipenis, and scale microdematoglyphics) along its wide geographical distr...
Article
Full-text available
Motivation We generated a novel database of Neotropical snakes (one of the world's richest herpetofauna) combining the most comprehensive, manually compiled distribution dataset with publicly available data. We assess, for the first time, the diversity patterns for all Neotropical snakes as well as sampling density and sampling biases. Main types...
Article
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Atractus flammigerus was described on the basis of two specimens from Java (in error). Subsequently, its lectotype was designated and the type locality restricted to Paramaribo in Suriname. Although this species has been repeatedly recorded throughout western Amazonia (mainly from Brazil and Peru), all of these records were erroneously assigned to...
Article
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We report a range extension of A. riveroi based on six specimens from the Amazon rainforest on the Brazilian side of the Pantepui region, in extreme northern portion of Brazil. In addition, we present new data on variation in color, morphometrics, and meristic characters.
Article
Atractus potschi was described based on 12 specimens from the Brazilian states of Alagoas and Sergipe, and later knowledge of its morphological variation (meristic, morphometric, and color pattern data) was augmented on the basis of nine additional individuals from additional localities in northeastern Brazil. Based on the examination of collection...
Article
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The question whether taxonomic descriptions naming new animal species without type specimen(s) deposited in collections should be accepted for publication by scientific journals and allowed by the Code has already been discussed in Zootaxa (Dubois & Nemésio 2007; Donegan 2008, 2009; Nemésio 2009a–b; Dubois 2009; Gentile & Snell 2009; Minelli 2009;...
Data
This plot is not part of the published stance but derives from it. The plot shows the number of authors by geographic region (courtesy of Dr. Diego Astua).
Article
Full-text available
We redescribe Atractus punctiventris based on the examination of its holotype, two topotypes, and two additional specimens recently collected. We describe two new species of Atractus with 15 dorsal scale rows, previously confused with Atractus insipidus, from the eastern and western portions of Brazilian Amazonia, respectively. The new species are...
Article
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WARNING: This study is under review. A preprint can be downloaded here: http://biorxiv.org/content/early/2016/03/05/042440.article-metrics Dipsadidae is the most diversified family of snakes, composed of species showing an impressive variety of color patterns. Some species are cryptic whereas others have contrasting patterns comprised by bright co...
Article
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As currently understood Atractus latifrons is widely distributed in South America, occurring from Suriname to the east of the Andes in Bolivia. Throughout this widespread distribution, at least three distinct color patterns were previously report-ed in the literature. Here, we test whether quantitative variation and qualitative distribution of morp...
Article
Full-text available
A new species of Atractus is described from cloud forests of the extreme northern Ecuadorian Andes, Tulcán County, Carchi Province. Atractus savagei sp. nov. is distinguished from all congeners by the combination of 17 dorsal scale rows, long loreal, six supralabials (third and fourth contacting orbit), seven infralabials (first four contacting chi...
Article
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We report additional specimens of Atractus titanicus from three municipalities in the western slope of the Central Cordillera of Colombia. Our reports fill a distribution gap of about 200 km (airline) between Sonsón and Tuluá. This findings support the previous suggestion that A. titanicus is apparently endemic of the western versant of the Central...
Article
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Atractus caxiuana was recently described based on three specimens (two males and one female) from the Floresta Nacional de Caxiuanã, municipality of Melgaço, state of Pará, in the eastern portion of the Brazilian Amazon. Apart from the type series, no additional samples are known for the species. In this study, we report new specimens of A. caxiuan...