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URI permanente desta comunidadehttps://bdc.icmbio.gov.br/handle/cecav/1401
Centro Nacional de Pesquisa e Conservação de Répteis e Anfíbios
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4 resultados
Resultados da Pesquisa
Item The small and inconspicuous majority:(Molecular Phylogenetics and Evolution, 2024-12) Mônico, Alexander Tamanini; Koch, Esteban Diego; Ferrão, Miquéias; Fernandes, Igor Yuri; Marques, Giselle Moura Guimarães; Chaparro, Juan Carlos; Rodrigues, Miguel Trefaut; Lima, Albertina Pimentel; Fouquet, AntoineWith more than 600 recognized species, the genus Pristimantis is already the most diverse among vertebrates, but described species only represent a fraction of the actual diversity in this clade. This genus is widely distributed throughout the Neotropics and represents an interesting model for biogeographic studies because Pristimantis spp. are direct developing and generally have narrow ecological niches and low dispersal abilities. The P. unistrigatus species group is one of the most important components in the genus (ca. 200 recognized species) and has been supported by morphological but not by molecular evidence. We assessed the species boundaries and distribution in the P. unistrigatus species group and infer spatiotemporal patterns of diversification related to historical landscape changes in the Neotropics. We gathered three mitochondrial, and two nuclear DNA loci from 416 specimens throughout the range of the group, and including 68 nominal species. We redefine the group based on the obtained phylogeny and found 151 candidate species that composes it, with 83 of these remaining undescribed. We recovered 11 major clades within the group that diverged before 13 Ma. The diversification of the group started during the early Miocene most likely in northwestern South America, currently corresponding to western Amazonia and northern Andes. The other neotropical areas subsequently acted as sinks, receiving lineages mostly during the last 10 Ma, after the demise of the Pebas System and the setup of the modern Amazonian hydrographic system.Item The small and inconspicuous majority:(Molecular Phylogenetics and Evolution, 2024) Mônico, Alexander Tamanini; Koch, Esteban Diego; Ferrão, Miquéias; Fernandes, Igor Yuri; Marques, Giselle Moura Guimarães; Chaparro, Juan Carlos; Rodrigues, Miguel Trefaut; Lima, Albertina Pimentel; Fouquet, AntoineWith more than 600 recognized species, the genus Pristimantis is already the most diverse among vertebrates, but described species only represent a fraction of the actual diversity in this clade. This genus is widely distributed throughout the Neotropics and represents an interesting model for biogeographic studies because Pristimantis spp. are direct developing and generally have narrow ecological niches and low dispersal abilities. The P. unistrigatus species group is one of the most important components in the genus (ca. 200 recognized species) and has been supported by morphological but not by molecular evidence. We assessed the species boundaries and distribution in the P. unistrigatus species group and infer spatiotemporal patterns of diversification related to historical landscape changes in the Neotropics. We gathered three mitochondrial, and two nuclear DNA loci from 416 specimens throughout the range of the group, and including 68 nominal species. We redefine the group based on the obtained phylogeny and found 151 candidate species that composes it, with 83 of these remaining undescribed. We recovered 11 major clades within the group that diverged before 13 Ma. The diversification of the group started during the early Miocene most likely in northwestern South America, currently corresponding to western Amazonia and northern Andes. The other neotropical areas subsequently acted as sinks, receiving lineages mostly during the last 10 Ma, after the demise of the Pebas System and the setup of the modern Amazonian hydrographic system.Item Tadpoles of the dyeing poison dart frog Dendrobates tinctorius (Cuvier, 1797) from eastern Amazonia(2024-01-15) Ferrão, Miquéias; Dias, Pedro Henrique; Kaefer, Igor L.; Ferreira, Anthony; Tavares-Pinheiro, Rodrigo; Freitas, Abdiel Pinheiro; Campos, Carlos Eduardo CostaThe dendrobatid genus Dendrobates Wagler currently includes five species distributed from southern Nicaragua throughCosta Rica, Panama, and Colombia to the Guianas and adjacent Brazil (Frost 2023). Two species are found in Brazil:Dendrobates leucomelas Steindachner and D. tinctorius (Cuvier). The latter was originally described from “Amérique”,and a neotype was designed by Silverstone (1975) from the Rivière Matarony, French Guiana. In Brazil, it is found inthe States Amapá and Pará (Avila-Pires et al. 2010; Taucce et al. 2022). It is a diurnal species that inhabits the leaf litterof rainforests, and exhibits polymorphism with various distinct post-metamorphic color patterns (Rojas & Pašukonis2019). Due to its popularity in the pet trade it is listed under Appendix II of CITES. Adults deposit clutches in the leaflitter, typically containing 2–14 eggs that hatch within 14–28 days. Males then transport the tadpoles to small waterbodies, e.g., palm bracts, bromeliads, or tree holes (Born 1994; Born et al. 2010; Rojas & Pašukonis 2019). Tadpoleshave a varied diet, including detritus, insect larvae and other tadpoles, often conspecific. Metamorphosis typically occursbetween 90 and 120 days after oviposition (Masurat & WolfRudiger 1991; Born 1994; Rojas & Pašukonis 2019). Theexternal morphology of a tadpole from the western slope of Vier Gebroeders Mountain in Surinam was briefly describedby Hoogmoed (1969) as D. azureus Hoogmoed, which is now considered a synonym of D. tinctorius (Wollenberg et al.2008). Silverstone (1975) provided additional descriptions and illustrations of the body and oral apparatus of specimensfrom Serra do Navio (Amapá, Brazil). Lescure (1984) provided a draft of the oral apparatus and body, but without anymorphological description. Finally, the chondrocranium morphology of these tadpoles was described by Haas (2003).Despite previous studies addressing the external morphology of D. tinctorius larvae, there are still several aspects thathave not been adequately described, and some character-states require further examination. Thus, in the present study, theexternal morphology of D. tinctorius is redescribed following current standards for larval descriptions.Item A new species of terrestrial foam-nesting frog of the Adenomera simonstuarti complex (Anura, Leptodactylidae) from white-sand forests of central Amazonia, Brazil(2024-03-07) Martins, Bryan da Cunha; Mônico, Alexander Tamanini; Mendonça, Cianir; Dantas, Silionamã P.; Souza, Jesus R. D.; Hanken, James; Lima, Albertina Pimentel; Ferrão, MiquéiasBy using integrative taxonomy, we describe a new species of terrestrial foam-nesting frog of the genus Adenomera from white-sand forests of the Rio Negro Sustainable Development Reserve, Central Amazonia, Brazil. Within the A. andreae clade, the new species belongs to the A. simonstuarti complex where it is sister to the lineage from the lower Juruá River. The new species is assigned to the genus Adenomera by having adult SVL smaller than 34.1 mm, by its lack of fringing and webbing between toes and by the absence of spines on the thumb of adult males. It differs from other Adenomera by the following combination of characters: antebrachial tubercle absent; toe tips flattened or slightly flattened, with visible expansions; nearly solid, dark-coloured stripe on underside of forearm; single-note advertisement call; notes formed by 11–21 incomplete pulses; call duration varying between 100 and 199 ms; fundamental frequency 1,765–2,239 Hz; dominant frequency 3,448–4,349 Hz; and endotrophic tadpoles with spiracle present and labial teeth absent. Over the last decade, we have inventoried many permanent sampling modules in ombrophilous forests in the Manaus Region and in the Purus-Madeira interfluve, but the new species was found only in the white-sand forest from West Negro-Solimões Interfluve. Adenomera sp. nov. may be endemic to, or at least a specialist in, this environment.