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1.
Iheringia, Sér. zool ; 112: e2022013, 2022. ilus
Artigo em Inglês | VETINDEX | ID: biblio-1380358

Resumo

The brain is one of the most important organs of vertebrates. Over the years, several studies have investigated brain features under different approaches, such as comparative morphology. Although many recent studies use non-invasive methods, such as micro-CT scan, some methods require access to the brain, such as histological analyses and cell count methods. In addition, several researchers do not have access to those expensive devices and rely on the traditional dissection to conduct their studies. Still, for most vertebrates, very few protocols are available for removing the brain, especially those committed to minimizing the damage to the specimen for further examinations. Here we describe in detail a method to dissect the brains of anurans and squamates maintaining the specimen's external morphology as undamaged as possible. This simple method can be performed using few tools and can be achieved in the first trials, representing an incentive for more research on vertebrate's brains. This method contributes to the maximum utilization of each animal collected, a positive practice from both ethical and practical perspectives.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Metodologias de Avaliação de Danos , Cérebro/anatomia & histologia , Contagem de Células , Anatomia Comparada
2.
Acta sci., Biol. sci ; 44: e58763, mar. 2022. ilus, tab
Artigo em Inglês | VETINDEX | ID: biblio-1391174

Resumo

Anurans vary in body coloration and frequently exhibit color polymorphism, with selection by predation pressure favoring more cryptic animals. Spatial differentiation may also favor color polymorphism in some species, since cryptic morphotypes can use substrates that better match their coloration. Boana pulchella is a polymorphic species with green and brown morphotypes, but its polymorphism remains poorly understood. The aim of the present study was to determine the functionality of color polymorphism in B. pulchella as a defense strategy. Artificial green and brown clay models were placed in environments with green and brown background to determine if the two morphotypes of B. pulchella experience different frequencies of attacks. We expected that more conspicuous morphs are attacked more frequently. The attack rate, which suggests predation intent, on the models was 9.57%. The marks observed in the artificial models were left by both mammals and birds. The number of damaged models did not significantly differ between the different background environments. The results indicate that B. pulchella morphotypes are equally cryptic to predators in the studied environments. In conclusion, probably color polymorphism in B. pulchella is not operating as a defensive strategy, and other selective forces may be acting in the maintenance of color polymorphism in this species.(AU)


Assuntos
Animais , Masculino , Anuros/anatomia & histologia , Polimorfismo Genético/fisiologia , Morfogênese , Ecossistema , Modelos Anatômicos
3.
Zoologia (Curitiba, Impr.) ; 39: e21008, 2022. tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1366063

Resumo

The importance of amphibian bioacoustics is widely documented in ecological, taxonomical and evolutionary studies, as calls might act as a primary mechanism of reproductive isolation. The influence of air temperature and male size on the variation of the advertisement calls in anurans is widely recognized but still insufficiently analyzed in Brazilian species. Our goals were to (1) describe the advertisement call of Aplastodiscus albosignatus (Lutz & Lutz, 1938), (2) test the influence of temperature and body size on its acoustic signals and (3) evaluate the variation of within and between-male acoustic signals. Advertisement calls of A. albosignatus consist of an unpulsed note with four harmonics. In most cases, the dominant frequency is the third harmonic but, in some calls, it was the minimum frequency (first harmonic). The average duration of calls was 0.191 s, the interval between calls was 2.08 s and the repetition rate was 33 calls per minute. On average, the minimum frequency was 550.15 Hz, the maximum frequency was 3531.70 Hz and the third harmonic was 2498.9 Hz. To evaluate the effect of air temperature, and body size on the variation of call parameters, we performed generalized linear models. The most explanatory model for spectral parameters was temperature plus body size. Concerning temporal variables, the best model that explains the variation in call duration was body size, while for the interval between calls was air temperature. The maximum frequency and the frequency of the third harmonic had little variation in the calls of both the same male and different males. Thus, these parameters were considered important in species recognition.(AU)


Assuntos
Animais , Masculino , Anuros/anatomia & histologia , Temperatura , Vocalização Animal/fisiologia , Tamanho Corporal/fisiologia
4.
Pap. avulsos Zool. ; 61: e20216177, 2021. ilus, graf, tab, mapas
Artigo em Inglês | VETINDEX | ID: vti-31800

Resumo

Scinax comprises more than 120 species which are split in two clades, the S. ruber and the S. catharinae clades. A few species within the S. catharinae clade occur in gallery forests of the Brazilian Cerrado. We here extend the distribution of S. centralis southwards based on new populations sampled in the banks of the Rio Paranaíba, in the borders of Minas Gerais (MG) and Goiás (GO) states, southeastern Brazil. We also provide further data on the species vocalization. Variation was seen among our population and topotypes regarding SVL and call dominant frequency, both likely representing a clinal variation. Our new population of S. centralis represents the first record of the species for the state of Minas Gerais.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Distribuição Animal
5.
Pap. avulsos Zool. ; 61: e20216176, 2021. ilus, tab
Artigo em Inglês | VETINDEX | ID: vti-31797

Resumo

The identification of anuran amphibians is still a challenge in megadiverse assemblages. In the Neotropics, the Atlantic Forest harbors more than 600 anuran species, and many studies in this ecoregion report anuran assemblages surpassing 30 species. Taxonomic keys facilitate the identification of biological diversity, however only a few are available for anuran assemblages in the Atlantic Forest. Herein we present an identification key for 40 anuran species distributed across 20 genera and nine families, occurring in the Environmental Protection Area of Catolé and Fernão Velho, northeastern Atlantic Forest. Thirty-five morphological characteristics were used in the key, all of which can be easily observed in living and museum specimens. This pioneer study provides the first identification key for an amphibian assemblage in the northeastern Atlantic Forest and this baseline information acts as the starting point for the development of evolutionary and ecological research in this conservation unit.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Áreas Protegidas/análise
6.
Pap. avulsos zool ; 60: e20206061, Feb. 14, 2020. ilus, map, tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1487277

Resumo

Local fauna inventories provide primary key information on diversity and distribution of species for conservation purposes. The Atlantic Forest holds 50% of anuran species in the country and the main threats to the conservation of this fauna are habitat reduction and fragmentation. The present study brings information on the local richness and species composition of four anuran taxocenoses from the subtropical Atlantic Forest of Paraná and Santa Catarina states, Brazil. Data collection included breeding sites surveys (N = 56) and literature review. Richness and beta diversity were compared through rarefaction/extrapolation curves, local contribution to beta diversity (LCBD), beta partitioning and cluster analysis. Anuran from 46 species were registered and local richness differences were observed on the rarefaction/extrapolation curves and on asymptotic analysis. Nevertheless, the LCBD did not detect differences in species composition among the four taxocenoses. The turnover was the predominant component of beta diversity. The geographical distances explain species composition for all localities compiled in this study. The differences among local richness may be related to environmental impacts, emphasizing the need for conservation of biodiversity in the remnants of Atlantic forest.


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Biodiversidade , Classificação , Brasil
7.
Pap. avulsos Zool. ; 60: e20206061, Nov. 16, 2020. ilus, mapas, tab, graf
Artigo em Inglês | VETINDEX | ID: vti-32431

Resumo

Local fauna inventories provide primary key information on diversity and distribution of species for conservation purposes. The Atlantic Forest holds 50% of anuran species in the country and the main threats to the conservation of this fauna are habitat reduction and fragmentation. The present study brings information on the local richness and species composition of four anuran taxocenoses from the subtropical Atlantic Forest of Paraná and Santa Catarina states, Brazil. Data collection included breeding sites surveys (N = 56) and literature review. Richness and beta diversity were compared through rarefaction/extrapolation curves, local contribution to beta diversity (LCBD), beta partitioning and cluster analysis. Anuran from 46 species were registered and local richness differences were observed on the rarefaction/extrapolation curves and on asymptotic analysis. Nevertheless, the LCBD did not detect differences in species composition among the four taxocenoses. The turnover was the predominant component of beta diversity. The geographical distances explain species composition for all localities compiled in this study. The differences among local richness may be related to environmental impacts, emphasizing the need for conservation of biodiversity in the remnants of Atlantic forest.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Classificação , Biodiversidade , Brasil
8.
Pap. avulsos zool ; 60: e20206056, Feb. 14, 2020. ilus, map, tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1487272

Resumo

The uncertain identity of Hyla x-signata Spix, 1824 has been a pervasive problem in the taxonomy of the genus Scinax. A species supposedly distributed from northeastern Brazil northwards to Colombia and Venezuela, described in a few lines without much information and with an accompanying figure, and its type specimen lost during World War II, combined to produce a curious situation. Twenty-one of the 39 species of the S. ruber Clade described in the last 50 years were considered to require a diagnosis from S. x-signatus by their authors. In most cases these had no other alternative than to gather information about this species from indirect sources, frequently pointing out the problems associated with its uncertain identity. In this paper, we review the taxonomic history of Hyla x-signata, designate a neotype, provide a redescription including advertisement call and sequence data, and diagnose it from all other species of the S. ruber Clade.


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Anuros/genética , Classificação/métodos
9.
Pap. avulsos Zool. ; 60: e20206056, Nov. 11, 2020. ilus, mapas, tab, graf
Artigo em Inglês | VETINDEX | ID: vti-33420

Resumo

The uncertain identity of Hyla x-signata Spix, 1824 has been a pervasive problem in the taxonomy of the genus Scinax. A species supposedly distributed from northeastern Brazil northwards to Colombia and Venezuela, described in a few lines without much information and with an accompanying figure, and its type specimen lost during World War II, combined to produce a curious situation. Twenty-one of the 39 species of the S. ruber Clade described in the last 50 years were considered to require a diagnosis from S. x-signatus by their authors. In most cases these had no other alternative than to gather information about this species from indirect sources, frequently pointing out the problems associated with its uncertain identity. In this paper, we review the taxonomic history of Hyla x-signata, designate a neotype, provide a redescription including advertisement call and sequence data, and diagnose it from all other species of the S. ruber Clade.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Anuros/genética , Classificação/métodos
10.
Revista Brasileira de Zoociências (Online) ; 20(2): 1-23, dez. 2019. ilus, map, tab
Artigo em Português | VETINDEX | ID: biblio-1494755

Resumo

O anuro Scinax tripui permanecia pouco conhecido. A partir de amostragens em campo no Quadrilátero Ferrífero e análises de coleções científicas são apresentados um expressivo número de novos registros geográficos da espécie na Mata Atlântica do estado de Minas Gerais, observações de uso de habitat e variações morfológicas. Exemplares de S. tripui foram coletados em 40 localidades e em coleções foram levantadas mais 19 localidades. Observou-se que a espécie distribui-se pelas serras do Quadrilátero Ferrífero e porção norte da Serra da Mantiqueira, no centro-sudeste de Minas Gerais e sul do Espírito Santo, com ocorrência frequente nas matas do Quadrilátero. Constatou-se que S. tripui é restrito a córregos e riachos perenes em ambiente florestal, sendo associado a microhabitats mais íntegros, e exibe atividade reprodutiva ao longo do inverno e início da primavera (julho a setembro). A coloração em vida de S. tripui variou principalmente na região inguinal e partes anterior e posterior da coxa, que podem ser verde-claras, azul-claras, amarelo-claras ou brancas; e no padrão de coloração dorsal, que pode ser cinza, oliva, palha ou marrom-claro. Foram aferidas sete medidas morfométricas de adultos, sendo obtida expressiva variação do tamanho (comprimento rostro-cloacal). As variações de coloração, medidas e porte foram recorrentes ao longo do Quadrilátero Ferrífero, sendo constatado que S. tripui exibe expressiva variação intrapopulacional.


The tree frog Scinax tripui is still little known. From field collections in the Quadrilátero Ferrífero, and analysis of scientific collections, we present here a large number of new geographic records for the species in the Atlantic Forest of Minas Gerais State, as well as observations of habitat use and morphological variation. We collected specimens of S. tripui in 40 localities, and obtained 19 further locations from scientific collections. We found that the species is distributed throughout the mountains of the Quadrilátero Ferrífero and northern portion of Mantiqueira mountain range, in the central-southeast of Minas Gerais and south of Espírito Santo States, and it is frequent in the forests of the Quadrilátero. Field studies showed that individuals of S. tripui are restricted to permanent streams in forested areas, associated with preserved microhabitats, and reproduce during local winter and early spring (July to September). We observed in life color variation for S. tripui, mainly of the inguinal region and anterior and posterior parts of the thigh (which may be light green, light blue, light yellow or white); and in the dorsal color pattern (which may be grey, olive, straw or light brown). Seven morphometric measurements of adults were taken, and significant variation was obtained for snout-vent length. Color variations, measurements and size were present along the Quadrilátero Ferrífero and S. tripui exhibits large intrapopulational variation.


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Especificidade da Espécie , Pele/anatomia & histologia , Brasil
11.
Zoologia (Curitiba, Impr.) ; 36: e29356, Apr. 18, 2019. ilus, tab
Artigo em Inglês | VETINDEX | ID: biblio-1504556

Resumo

The anuran skin characteristically has different types of glands, most of which are microscopic and are spread throughout the skin. Some species have specialized regions where glands agglomerate, forming macroglands. The description of the external morphology of Ololygon centralis (Pombal & Bastos, 1996) revealed the presence of an inguinal gland. Ololygon centralis is the only species of the genus that has a macrogland. The present study found these inguinal macroglands to be present only on male specimens, thus characterizing it as a sexually dimorphic skin gland. Microscopic analysis revealed that these glands are composed of many syncytial units involved by myoepithelial cells. The center of the syncytium is full of a proteinaceous secretion with a basic pH and the absence of sugar residues. Similar glands observed in other anuran species have been associated with pheromone production, suggesting that the inguinal glands described for O. centralis males may have a similar function.


Assuntos
Masculino , Feminino , Animais , Anuros/anatomia & histologia , Canal Inguinal/anatomia & histologia , Caracteres Sexuais , Glândulas Sebáceas , Microscopia Eletrônica de Transmissão/veterinária
12.
Zoologia (Curitiba) ; 36: e29356, July 22, 2019. ilus, tab
Artigo em Inglês | VETINDEX | ID: vti-21723

Resumo

The anuran skin characteristically has different types of glands, most of which are microscopic and are spread throughout the skin. Some species have specialized regions where glands agglomerate, forming macroglands. The description of the external morphology of Ololygon centralis (Pombal & Bastos, 1996) revealed the presence of an inguinal gland. Ololygon centralis is the only species of the genus that has a macrogland. The present study found these inguinal macroglands to be present only on male specimens, thus characterizing it as a sexually dimorphic skin gland. Microscopic analysis revealed that these glands are composed of many syncytial units involved by myoepithelial cells. The center of the syncytium is full of a proteinaceous secretion with a basic pH and the absence of sugar residues. Similar glands observed in other anuran species have been associated with pheromone production, suggesting that the inguinal glands described for O. centralis males may have a similar function.(AU)


Assuntos
Animais , Masculino , Feminino , Caracteres Sexuais , Anuros/anatomia & histologia , Canal Inguinal/anatomia & histologia , Glândulas Sebáceas , Microscopia Eletrônica de Transmissão/veterinária
13.
R. bras. Zoo. ; 20(2): 1-23, dez. 2019. ilus, mapas, tab
Artigo em Português | VETINDEX | ID: vti-24362

Resumo

O anuro Scinax tripui permanecia pouco conhecido. A partir de amostragens em campo no Quadrilátero Ferrífero e análises de coleções científicas são apresentados um expressivo número de novos registros geográficos da espécie na Mata Atlântica do estado de Minas Gerais, observações de uso de habitat e variações morfológicas. Exemplares de S. tripui foram coletados em 40 localidades e em coleções foram levantadas mais 19 localidades. Observou-se que a espécie distribui-se pelas serras do Quadrilátero Ferrífero e porção norte da Serra da Mantiqueira, no centro-sudeste de Minas Gerais e sul do Espírito Santo, com ocorrência frequente nas matas do Quadrilátero. Constatou-se que S. tripui é restrito a córregos e riachos perenes em ambiente florestal, sendo associado a microhabitats mais íntegros, e exibe atividade reprodutiva ao longo do inverno e início da primavera (julho a setembro). A coloração em vida de S. tripui variou principalmente na região inguinal e partes anterior e posterior da coxa, que podem ser verde-claras, azul-claras, amarelo-claras ou brancas; e no padrão de coloração dorsal, que pode ser cinza, oliva, palha ou marrom-claro. Foram aferidas sete medidas morfométricas de adultos, sendo obtida expressiva variação do tamanho (comprimento rostro-cloacal). As variações de coloração, medidas e porte foram recorrentes ao longo do Quadrilátero Ferrífero, sendo constatado que S. tripui exibe expressiva variação intrapopulacional.(AU)


The tree frog Scinax tripui is still little known. From field collections in the Quadrilátero Ferrífero, and analysis of scientific collections, we present here a large number of new geographic records for the species in the Atlantic Forest of Minas Gerais State, as well as observations of habitat use and morphological variation. We collected specimens of S. tripui in 40 localities, and obtained 19 further locations from scientific collections. We found that the species is distributed throughout the mountains of the Quadrilátero Ferrífero and northern portion of Mantiqueira mountain range, in the central-southeast of Minas Gerais and south of Espírito Santo States, and it is frequent in the forests of the Quadrilátero. Field studies showed that individuals of S. tripui are restricted to permanent streams in forested areas, associated with preserved microhabitats, and reproduce during local winter and early spring (July to September). We observed in life color variation for S. tripui, mainly of the inguinal region and anterior and posterior parts of the thigh (which may be light green, light blue, light yellow or white); and in the dorsal color pattern (which may be grey, olive, straw or light brown). Seven morphometric measurements of adults were taken, and significant variation was obtained for snout-vent length. Color variations, measurements and size were present along the Quadrilátero Ferrífero and S. tripui exhibits large intrapopulational variation.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Pele/anatomia & histologia , Especificidade da Espécie , Brasil
14.
Zoologia (Curitiba, Impr.) ; 34: 1-7, 2017. graf, tab, ilus
Artigo em Inglês | VETINDEX | ID: biblio-1504457

Resumo

In the semi-arid environment, the reproductive success of anurans depends on adaptations in their life cycle, which synchronizes with ideal environmental conditions to maximize the number of offspring. In this study changes in the histological and morphometric aspects of the testes of Leptodactylus macrosternum Miranda-Ribeiro, 1926 are characterized, to evaluate the influence of rainfall and temperature on them. Specimens were collected at Horto Florestal Olho d’Água da Bica - HFOB (06°49’20”S, 36°15’85”W) area, municipality of Cuité, state of Paraíba, Brazil. Search for specimens was active, happened at night, and amounted to 15 days from January to December 2013. The densities of spermatids (primary and secondary), sperm and area of the seminiferous locules of the testes were registered. The influence of climate variables (rainfall and temperature) on the density of primary and secondary spermatids, sperm and locular area were verified using Simple Linear Regression. Primary spermatids had the lowest density in July (57.90 ± 51.54 mm2), with a peak in November (300.32 ± 117.35 mm2); secondary spermatids had the lowest density in December (287.87 ± 79.05 mm2), with a peak in May (135,727.00 ± 301.13 mm2); sperm was in the lowest density in July (237.37 ± 121.10 mm2), with a peak in June (2,270.45 ± 602.62 mm2) and the locular area had the lowest density in December (40,292.9 ± 8,174.20 µm2) and highest density in June (338,875.01 ± 2,262.10 µm2). A notable decrease in sperm density was evident between June and July. That, associated with the observation of a larger locular area in June, allowed us to identify as June as the peak of spermatogenesis and the following month as the most potentially reproductive. The density of secondary spermatids(r = 0.02), sperm (r = 0.21) and locular area (r = 0.01) showed dependency on rainfall whereas only sperm (r = 0.09) showed dependency on temperature.[...]


Assuntos
Masculino , Animais , Anuros/anatomia & histologia , Espermatogênese , Espermátides , Brasil , Reprodução , Zona Semiárida
15.
Zoologia (Curitiba) ; 34: 1-7, 2017. graf, tab, ilus
Artigo em Inglês | VETINDEX | ID: vti-17386

Resumo

In the semi-arid environment, the reproductive success of anurans depends on adaptations in their life cycle, which synchronizes with ideal environmental conditions to maximize the number of offspring. In this study changes in the histological and morphometric aspects of the testes of Leptodactylus macrosternum Miranda-Ribeiro, 1926 are characterized, to evaluate the influence of rainfall and temperature on them. Specimens were collected at Horto Florestal Olho dÁgua da Bica - HFOB (06°4920”S, 36°1585”W) area, municipality of Cuité, state of Paraíba, Brazil. Search for specimens was active, happened at night, and amounted to 15 days from January to December 2013. The densities of spermatids (primary and secondary), sperm and area of the seminiferous locules of the testes were registered. The influence of climate variables (rainfall and temperature) on the density of primary and secondary spermatids, sperm and locular area were verified using Simple Linear Regression. Primary spermatids had the lowest density in July (57.90 ± 51.54 mm2), with a peak in November (300.32 ± 117.35 mm2); secondary spermatids had the lowest density in December (287.87 ± 79.05 mm2), with a peak in May (135,727.00 ± 301.13 mm2); sperm was in the lowest density in July (237.37 ± 121.10 mm2), with a peak in June (2,270.45 ± 602.62 mm2) and the locular area had the lowest density in December (40,292.9 ± 8,174.20 µm2) and highest density in June (338,875.01 ± 2,262.10 µm2). A notable decrease in sperm density was evident between June and July. That, associated with the observation of a larger locular area in June, allowed us to identify as June as the peak of spermatogenesis and the following month as the most potentially reproductive. The density of secondary spermatids(r = 0.02), sperm (r = 0.21) and locular area (r = 0.01) showed dependency on rainfall whereas only sperm (r = 0.09) showed dependency on temperature.[...](AU)


Assuntos
Animais , Masculino , Anuros/anatomia & histologia , Espermatogênese , Espermátides , Reprodução , Zona Semiárida , Brasil
16.
Pap. avulsos zool ; 57(15): 177-195, 2017. ilus, tab, map, graf
Artigo em Espanhol | VETINDEX | ID: biblio-1486998

Resumo

We describe a small frog of the genus Pristimantis inhabiting bromeliads (snout-vent length 20.323.3 mm in females, 16.117.4 mm in males), from a remote sandstone plateau of the Cordillera del Condor, in southeastern Ecuador, with an altitudinal range of 2,0452,860 m. A phylogeny based on sequences of DNA (mitochondrial and nuclear genes) supports inclusion in the P. orestes group and suggests an undescribed Pristimantis from the southern slope of eastern Ecuador as the closest taxon. The new species differs from its congeners in Ecuador by having predominantly black dorsal and ventral coloration; comprehensive and robust palmar surface with stubby fingers; presence of a deep and wide groove from the anterior base of finger I to the rear base of the palmar tubercle; subarticular divided tubers, enlarged supernumerary small granules and tubercles. All individuals were found in terrestrial bromeliads. The calls are short, frequency modulated, comprising of a note 515 ms in duration. Insects represented 80% of the diet of the new species.


Describimos una especie pequeña de rana bromelícola del género Pristimantis (longitud rostro-cloaca en hembras 20.3-23.3 mm; en machos 16.1-17.4 mm), proveniente de una remota meseta de arenisca de la Cordillera del Cóndor, en el sureste de Ecuador, con un rango altitudi-nal de 2.045-2.860 m. Una filogenia en base a secuencias de ADN (genes mitocondriales y nucleares) muestra que la nueva especie forma parte del grupo P. orestes y está más cercanamente relacionada con una especie de Pristimantis aún no descrita de la vertiente sur oriental ecuatoriana. Difiere de sus congéneres de Ecuador, por su coloración dorsal y ventral predominantemente negra; superficie palmar amplia y robusta con dedos cortos y gruesos; presencia de un surco profundo y amplio extendi-do desde la base anterior del I dedo manual hasta la base posterior del tubérculo palmar; tubérculos subarticulares divididos, tubérculos supernumerarios agrandados y con granulaciones pequeñas. Todos los individuos registrados estuvieron en bromelias terrestres. Las llamadas son cor-tas, de frecuencia modulada, conformada por una nota con duración de 5-15 ms. Los insectos representaron el 80% de la dieta de la especie nueva.


Assuntos
Animais , Anuros/anatomia & histologia , Bromelia , Classificação , Filogenia , Equador
17.
Pap. avulsos Zool. ; 57(15): 177-195, 2017. ilus, tab, mapas, graf
Artigo em Espanhol | VETINDEX | ID: vti-13254

Resumo

We describe a small frog of the genus Pristimantis inhabiting bromeliads (snout-vent length 20.323.3 mm in females, 16.117.4 mm in males), from a remote sandstone plateau of the Cordillera del Condor, in southeastern Ecuador, with an altitudinal range of 2,0452,860 m. A phylogeny based on sequences of DNA (mitochondrial and nuclear genes) supports inclusion in the P. orestes group and suggests an undescribed Pristimantis from the southern slope of eastern Ecuador as the closest taxon. The new species differs from its congeners in Ecuador by having predominantly black dorsal and ventral coloration; comprehensive and robust palmar surface with stubby fingers; presence of a deep and wide groove from the anterior base of finger I to the rear base of the palmar tubercle; subarticular divided tubers, enlarged supernumerary small granules and tubercles. All individuals were found in terrestrial bromeliads. The calls are short, frequency modulated, comprising of a note 515 ms in duration. Insects represented 80% of the diet of the new species.(AU)


Describimos una especie pequeña de rana bromelícola del género Pristimantis (longitud rostro-cloaca en hembras 20.3-23.3 mm; en machos 16.1-17.4 mm), proveniente de una remota meseta de arenisca de la Cordillera del Cóndor, en el sureste de Ecuador, con un rango altitudi-nal de 2.045-2.860 m. Una filogenia en base a secuencias de ADN (genes mitocondriales y nucleares) muestra que la nueva especie forma parte del grupo P. orestes y está más cercanamente relacionada con una especie de Pristimantis aún no descrita de la vertiente sur oriental ecuatoriana. Difiere de sus congéneres de Ecuador, por su coloración dorsal y ventral predominantemente negra; superficie palmar amplia y robusta con dedos cortos y gruesos; presencia de un surco profundo y amplio extendi-do desde la base anterior del I dedo manual hasta la base posterior del tubérculo palmar; tubérculos subarticulares divididos, tubérculos supernumerarios agrandados y con granulaciones pequeñas. Todos los individuos registrados estuvieron en bromelias terrestres. Las llamadas son cor-tas, de frecuencia modulada, conformada por una nota con duración de 5-15 ms. Los insectos representaron el 80% de la dieta de la especie nueva.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Filogenia , Classificação , Bromelia , Equador
18.
Zoologia (Curitiba, Impr.) ; 33(2): e20150037, May 2016. tab, ilus
Artigo em Inglês | VETINDEX | ID: biblio-1504390

Resumo

Tropical anuran communities are very diverse. Nevertheless, much of their ecological and historical processes remain unknown. Bioacoustical studies are important to help to solve these puzzles. In the present study we examined the effect of environmental (air temperature and humidity) and morphological (body size) attributes on the acoustic parameters of two frogs of the Hypsiboas albopunctatus species group (H. albopunctatus and H. paranaiba ) living in sympatry and allopatry in the Brazilian cerrado. We also investigated if the presence of one species influences the spatial distribution or vocal behaviour of the other. We found H. albopunctatus and H. paranaiba males emitting advertisement and aggressive calls in sympatry and allopatry. Although the calling behavior of H. paranaiba did not differ in sympatry and allopatry, differences were noted for H. albopunctatus . Bioacoustics is the main form of communication in anurans, and is one of the best ways to discriminate among species. Variations in the calling behavior of males and what drives these variations in both species is central to better understand the processes of specific recognition and female attraction.


Assuntos
Animais , Acústica , Anuros/anatomia & histologia , Comunicação Animal , Vocalização Animal , Especiação Genética , Simpatria
19.
Zoologia (Curitiba) ; 33(2): e20150037, May 2016. tab, ilus
Artigo em Inglês | VETINDEX | ID: vti-20965

Resumo

Tropical anuran communities are very diverse. Nevertheless, much of their ecological and historical processes remain unknown. Bioacoustical studies are important to help to solve these puzzles. In the present study we examined the effect of environmental (air temperature and humidity) and morphological (body size) attributes on the acoustic parameters of two frogs of the Hypsiboas albopunctatus species group (H. albopunctatus and H. paranaiba ) living in sympatry and allopatry in the Brazilian cerrado. We also investigated if the presence of one species influences the spatial distribution or vocal behaviour of the other. We found H. albopunctatus and H. paranaiba males emitting advertisement and aggressive calls in sympatry and allopatry. Although the calling behavior of H. paranaiba did not differ in sympatry and allopatry, differences were noted for H. albopunctatus . Bioacoustics is the main form of communication in anurans, and is one of the best ways to discriminate among species. Variations in the calling behavior of males and what drives these variations in both species is central to better understand the processes of specific recognition and female attraction.(AU)


Assuntos
Animais , Anuros/anatomia & histologia , Acústica , Comunicação Animal , Vocalização Animal , Simpatria , Especiação Genética
20.
Zoologia (Curitiba, Impr.) ; 32(1): 9-13, Jan.-Feb. 2015. ilus, tab, graf
Artigo em Inglês | VETINDEX | ID: biblio-1504300

Resumo

Neste estudo, avaliamos como as espécies de anuros foram distribuídas em habitats ribeirinhos ao longo de dois grandes rios. A amostragem foi realizada entre janeiro e março de 2012 no município de Cachoeiras de Macacu, estado do Rio de Janeiro. Delimitamos 20 parcelas ao longo de cada rio, dez em porções dentro da floresta da Reserva Ecológica de Guapiaçu (REGUA), e com quantidade comparativamente maior de cobertura florestal, e dez fora da REGUA, com cobertura florestal comparativamente menor ao redor dos rios. Registramos 70 indivíduos de 14 espécies de rãs do rio Manoel Alexandre e 63 indivíduos de 15 espécies de rãs do rio Guapiaçu. A espécie mais abundante em ambos os rios foi Cycloramphus brasiliensis.(Steindachner, 1864), sendo mais abundante nos trechos com maior cobertura florestal. Essas informações, juntamente com a ocorrência de espécies mais adaptadas a habitats abertos e mais perturbados em trechos de rios que abrigam menos vegetação ribeirinha, ajudam a explicar as diferenças na composição de espécies de anfíbios entre trechos de rio com maior e menor cobertura florestal. Os resultados do nosso estudo destacam a importância da preservação da mata ciliar associada aos rios da Mata Atlântica para a conservação dos anfíbios.


Assuntos
Animais , Anuros/anatomia & histologia , Anuros/classificação , Distribuição Animal , Ecossistema , Brasil
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