A5030245534- Amphibian and Reptile Biology
- Animal Behavior and Reproduction
- Plant and animal studies
- Species Distribution and Climate Change
- Lepidoptera: Biology and Taxonomy
- Animal and Plant Science Education
- Bat Biology and Ecology Studies
- Chromosomal and Genetic Variations
- Turtle Biology and Conservation
- Genomics and Phylogenetic Studies
- Fish biology, ecology, and behavior
- Genetic diversity and population structure
- Dermatological diseases and infestations
- Primate Behavior and Ecology
- Wildlife Ecology and Conservation
- Fish Ecology and Management Studies
- Mosquito-borne diseases and control
- Ecology and biodiversity studies
- Invertebrate Taxonomy and Ecology
- Social Issues and Policies in Latin America
- Spectroscopy and Chemometric Analyses
- Insect and Arachnid Ecology and Behavior
- Entomological Studies and Ecology
- Fossil Insects in Amber
- Plant and soil sciences
Consejo Nacional de Investigaciones Científicas y Técnicas
2015-2024
Instituto de Biología Subtropical
2020-2023
National University of Misiones
2006-2023
Bernardino Rivadavia Natural Sciences Museum
2012-2021
A new species of Physalaemus from Misiones province, Argentina, in the Atlantic forest domain is described. The a member P. gracilis group, based on its phylogenetic position and occurrence putative morphological synapomorphy (occurrence an unpigmented median stripe throat, chest, and/or abdomen). sp. nov. characterized by long advertisement call composed non-pulsed notes with slightly descendant modulation, large size (mean SVL = 32.0 mm males, 34.0 females), slender body aspect, head...
True toads of the genus Rhinella are among most common and diverse group Neotropical anurans. These widely distributed throughout South America, inhabiting a great diversity environments ecoregions. Currently, however, is defined solely on basis molecular characters, it lacks proper diagnosis. Although some phenetic species groups have traditionally been recognized within Rhinella, monophyly them rejected in previous phylogenetic analyses, many remain unassigned to these poorly groups....
The horned frog family, Ceratophryidae, currently comprises three genera and 12 extant species, distributed from the Caribbean lowlands to Pampean grasslands. Horned frogs are fossorial species that remarkable in terms of their adult larval morphology, karyotype, behavior, other aspects biology. In this paper we present a molecular phylogenetic analysis with goals of: (1) exploring relationships among Ceratophryidae; (2) studying evolution polyploidy; (3) cocoon formation development...
Abstract Most anurans possess a tympanic middle ear (TME) that transmits sound waves to the inner ear; however, numerous species lack some or all TME components. To understand evolution of these structures, we undertook comprehensive assessment their occurrence across and performed ancestral character state reconstructions. Our analysis indicates was completely lost at least 38 independent times in Anura. The inferred evolutionary history is exceptionally complex true toads (Bufonidae),...
Scinax is the most species-rich genus of Neotropical treefrogs, with 129 currently recognized species divided between two major clades, S. catharinae and ruber clades. The clade includes 52 placed in perpusillus groups, whereas composed 77 species, 13 which are included groups: rostratus uruguayus all 64 remaining being unassigned to any group. Although some studies have addressed phylogenetic relationships genus, its remain poorly understood. To test monophyly within among them, we...
We present a molecular phylogenetic analysis of the hylid tribe Hylini, with goals testing monophyly genera Duellmanohyla, Isthmohyla, and Ptychohyla providing discussion on Bromeliohyla, Charadrahyla, Ecnomiohyla, Exerodonta, Megastomatohyla, Sarcohyla. Our results indicate paraphyly Ptychohyla, Bromeliohyla Duellmanohyla nested within it, and, as in previous analyses, (due to legleri P. salvadorensis being it). To resolve this situation, we restrict contents redelimit those erect two new...
We present a comprehensive review of larval morphology in the Neotropical toad genus Melanophryniscus. The taxa studied included 23 species with representatives recognized phenetic groups and different ecomorphological guilds: pond, stream, phytotelm-dwelling tadpoles. Their external variation is congruent current arrangement based on adult features, but also reflects habitat where larvae develop. Lotic tadpoles (i.e. M. tumifrons group krauczuki) general exhibit more depressed body, longer...
Dendropsophini is the most species-rich tribe within Hylidae with 234 described species. Although cytogenetic information sparse, chromosome numbers and morphology have been considered as an important character system for systematic inferences in this group. Using a diversity of standard molecular techniques, we describe previously unknown karyotypes genera <i>Xenohyla</i>, <i>Scarthyla</i> <i>Sphaenorhynchus</i> provide new on...
The Rhinella granulosa group consists of 13 species toads distributed throughout open areas South America and Panama. In this paper we perform a phylogenetic analysis considering all but one the group, employing five nuclear four mitochondrial genes, for up to 7910 bp per specimen. Separate analyses under direct optimization (DO) sequences recovered R. as monophyletic revealed topological incongruence that can be explained mainly by multiple events hybridization introgression, both nuclear....
Despite the amount of data on different aspects biodiversity, such as species distributions, taxonomy, or phylogenetics, there are still significant gaps and biases in available information. This is particularly true for life history traits, with fragmentary most taxa, especially those complex cycles. Anurans (frogs toads) show larval (premetamorphic) stages that general radically decoupled from adult forms biological aspects. Our understanding this group highly uneven, main wide-scope...
In recent decades, a renewed interest in comparative studies of embryonic ontogeny anurans is taking place. Toad embryos are often employed as model organisms, and scarce attention has been put on interspecific variations. this work we analyze the development transient larval structures 21 species five genera Bufonidae. These vary their ovipositional mode type environments where tadpoles develop, including ponds, streams, axils leaves terrestrial or epiphytic plants. Comparative anatomical...
We studied the foot musculature of fossorial family Odontophrynidae (composed genera Macrogenioglottus, Odontophrynus, and Proceratophrys) plus several outgroup taxa from Hyloidea other burrowing across Anura. found novel character-states supporting monophyly Proceratophrys, Odontophrynus + Macrogenioglottus. The observed in O. cultripes support conflicting phylogenetic positions within Odontophrynus. A comparison some with a diverse sample suggests that modifications might be involved digging.
Although studies of anuran hand and foot musculature began in the first half 19th century, all to date have been taxonomically or anatomically restricted scope, none has considered diversity autopodial myology Anura as a whole. As model for future comparisons, we thoroughly describe an arboreal species (the hylid Triprion petasatus), define layers which these muscles are arranged, attribute presumed functions. On basis our myological analysis 155 representing 46 54 currently recognized...
Abstract Skin glands in amphibians are either distributed throughout the skin or aggregated multiglandular structures such as parotoids typical of most species Bufonidae. Although many early divergent and derived bufonids lack a discrete parotoid postorbital–supratympanic (PoSt) region, they have great macroscopic diversity morphology this region. To understand origin evolution diversity, particular parotoids, we describe histomorphology PoSt dorsal regions 17 bufonids, with without external...
The eyes of frogs and toads (Anura) are among their most fascinating features. Although several pupil shapes have been described, the diversity, evolution, functional role in anurans received little attention. Studying photographs more than 3200 species, we surveyed described morphological variation, tested correlation with adult habits diel activity, discuss major evolutionary patterns considering iris anatomy visual ecology. Our results indicate that is a highly plastic structure, seven...
We present a cytogenetic survey of the basal bufonid genus Melanophryniscus that covered 14 25 species currently recognized, representing three phenetic groups: M. moreirae, stelzneri, and tumifrons. All presented diploid chromosome complement constituted by 11 bi-armed pairs (2n = 2x 22; FN 44). Some remarkable differences were observed between pair 4 was metacentric in tumifrons group (also with distinctive C-positive block) but submetacentric stelzneri sanmartini (M. moreirae group); 5...
We describe the larval morphology of Rhinella azarai, a medium-sized species granulosa group. None morphological characters allow larvae R. azarai to be distinguished unequivocally from those other in However, tadpoles show distinctive set character states shared with some group, which may represent putative synapomorphies group or internal clades.
We describe a new species of Oreobates from Jujuy, Argentina. The is clearly diagnosable other by combination morphological characters and support molecular evidence (genetic distance phylogenetic analysis). also provide taxonomic comments about O. discoidalis barituensis, emphasizing the need for an exhaustive revision these species.
Odontophrynus maisuma is a recently described diploid species of the diploid-tetraploid O. americanus complex. It inhabits coastal regions Uruguay and southern Brazil. Tadpoles at stages 33–36 are about 47 mm total length, similarly to that other typical pond dwelling anuran larvae; oral disc small laterally emarginated, bearing single row marginal papillae interrupted by large dorsal gap. The labial tooth formula 2(2)/3(1); sometimes A2 P1 not divided. advertisement call consists notes last...
Abstract Anurans show a wide variety of anti-predator mechanisms, and the species Neotropical clade Leiuperinae display several them. Most Edalorhina, Physalaemus Pleurodema eyespots, hidden bright colours, macroglands in inguinal/lumbar position, defensive behaviours and/or chemical defence. We conducted histological analysis dorsal lumbar skin revised colour patterns, glandular secretions to study diversity evolution mechanisms associated with macroglands. describe 17 characters optimize...