A5078472426- Amphibian and Reptile Biology
- Animal and Plant Science Education
- Species Distribution and Climate Change
- Plant and animal studies
- Animal Behavior and Reproduction
- Lepidoptera: Biology and Taxonomy
- Turtle Biology and Conservation
- Fish biology, ecology, and behavior
- Chromosomal and Genetic Variations
- Paleontology and Evolutionary Biology
- Bat Biology and Ecology Studies
- Medical research and treatments
- Mosquito-borne diseases and control
- Primate Behavior and Ecology
- Ichthyology and Marine Biology
- Genomics and Phylogenetic Studies
- Plant Virus Research Studies
- Evolution and Paleontology Studies
- Plant and soil sciences
- Fish Biology and Ecology Studies
- Infectious Diseases and Mycology
- Dental Erosion and Treatment
- Aquaculture disease management and microbiota
- Dermatological diseases and infestations
- Wildlife-Road Interactions and Conservation
Universidade de São Paulo
2023
Universidad de la República
2006-2019
Centro Uruguayo de Imagenología Molecular
2019
Universidad Católica del Uruguay
2006-2016
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....
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...
Abstract The food habits of the Broad‐snouted Caiman (Caiman latirostris) were studied in northwestern Uruguay. most common prey insects, shrimp Pseudopalaemon bouvieri, snail Pomacea canaliculata, fish and birds. Spiders, crabs, amphibians, snakes, turtles mammals consumed less frequently. Arthropods frequent for juvenile caiman. Fish snails by all size classes. proportion stomach contents with invertebrates decreased increasing caiman size, that vertebrates was greater diet larger Diet...
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...
Pleurodema bibroni and P. kriegi are poorly known species with a troublesome taxonomic history. They cryptic taxa, currently considered as valid on the grounds of biogeographic ecological differences. The first is from much southern Uruguay northeastern region State Rio Grande do Sul, Brazil (from sea level to 900 m a.s.l.); latter restricted high grasslands Sierras Grandes in central Argentina, between 800–2000 a.s.l. Herein, we compare their tadpoles advertisement call provide some notes...
The hylid frog genus Scinax is the most species-rich within Hylinae, with more than 100 recognized species grouped in S. catharinae and ruber clades. karyotypes of 14 clade were analyzed, several them for first time. All studied presented 2n = 2x 24 biarmed chromosomes (FN 48) no identifiable sex chromosomes. There are two alternate states associated size morphology pair 1, corresponding to clade. pairs 2 6 also differentiate both major Species general have Ag-NORs 11, as commonly observed...
The oral apparatus of anuran tadpoles is a unique structure composed soft and keratinized parts surrounding the mouth. Among many variations, common involves dorsal gap in marginal papillae, jaw sheaths, two upper three lower rows labial teeth. In Leiuperidae, besides this generalized morphology, four configurations are distinguished by arrangement papillae number tooth rows. Study early ontogeny 12 species representing these five shows variations development third row. Similar may result...
We studied the oral apparatus, buccal cavity and musculoskeletal features in tadpoles of five species genus Scinax (S. acuminatus, S. uruguayus, aff. pinima, aromothyella, berthae). Observed variation is mainly related to intrageneric grouping. acuminatus ruber clade, sister taxon rostratus group) has a distinctive combination mental gap margin papillae, straight labial teeth with few or absent cusps, processus muscularis acute posteriorly directed, m. subarcualis rectus I two slips....
The Rhinella granulosa group currently includes 12 species distributed eastern to the Andes, from Panama central Argentina. We studied bioacoustic features of advertisement calls in seven these species: azarai, R. bergi, centralis, dorbignyi, fernandezae, major, and merianae. In addition, we analyzed release fernandezae. consisted long trills, composed by notes with a variable pulse number (2–8) that was characteristic each species. single note, pulsed or not. Both clearly varied between...
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...
In this work the tadpoles of neotropical frogs Leptodactylus latinasus, Physalaemus biligonigerus and riograndensis are redescribed. Relevant features L. latinasus a medial vent tube, labial tooth row formula (LTRF) 2(2)/3(1), oral disc with single marginal papillae interrupted by dorsal gap, similarly to other species within fuscus group. Tadpoles P. have LTRF 2(2)/2(1), papillae, gap usually two ventrolateral gaps. The tadpole has dextral presents (sometimes double ventrally) 2(2)/2(1)....
Amphibian chytridiomycosis caused by Batrachochytrium dendrobatidis is reported in Uruguayan native amphibians for the first time. Histological evidence of infection was observed tadpoles Hypsiboas pulchellus, Odontophrynus maisuma, Physalaemus henselii, and Scinax squalirostris. The effects on these species are still unknown. However, disease potential concern conservation apparently declining P. henselii also O. given its restricted distribution habitats which being increasingly disturbed.
In this work, we studied chromosome morphology, Ag-NOR, and C-banding patterns in the Neotropical leiuperid frogs that compose Physalaemus henselii species group: fernandezae, henselii, riograndensis. The diploid complement all was 2n = 22 consisted of seven large to medium four small pairs. Chromosome fundamental number (FN) varied, because pair 11 metacentric P. riograndensis (FN 44) but telocentric fernandezae 42). Each presented a single Ag-NORs, which are located secondary constriction...
Physalaemus henselii (Peters, 1872) is a little known leiuperid frog that has not been studied since the 1960’s. Herein, we redescribe its advertisement call, and assess female sexual cycle reproductive period on basis of macroscopic analysis ovaries field observations. The Ovarian Size Factor (OSF) was calculated. study made in Departamento de Rivera, northern Uruguay. call consists short (177 ± 21ms), multipulsed (20 3 pulses/note) notes, with note repetition rate 1.57 0.13 notes/s....
The native species of amphibians and reptiles Uruguay were categorized according to the IUCN Red List criteria. Out 47 amphibian species, seven are listed as Critically Endangered (CR), five (EN), one Vulnerable (VU), three Near Threatened (NT), two Data Deficient (DD); remaining considered be Least Concern (LC). Among 64 evaluated, is (NT) rest use these results an additional criterion in definition protected areas will contribute towards conservation aforementioned threatened their...
Amphibian parasites of the Order Dermocystida (Ichthyosporea) are widespread pathogens known mainly from Europe and North America, which cause primarily a disease skin subcutaneous tissue in their hosts. The taxonomy these organisms has been problematic given conserved morphology, similar clinical pathology. Currently recognized taxa belong to three closely related genera, Amphibiocystidium, Amphibiothecum, Rhinosporidium, whereas species Dermocystidium Sphaerothecum destruens include fish...
The study of early development in Neotropical Leiuperinae frogs (Anura, Leptodactylidae) has been addressed by several works recent times. However, a comparative developmental approach under phylogenetic context was not available. Herein we analyzed the morphological and ontogenetic diversity embryos belonging to 22 species three largest genera Leiuperinae. We find that most cases, variations fit with phylogeny at inter- intrageneric levels. Embryo kyphosis whitish color are synapomorphies...
Eupemphix fuscomaculatus Steindachner, 1864 was described on the basis of a single specimen collected at Caiçara, Mato Grosso, Brazil. This species, currently included in genus Pleurodema, experienced confusing taxonomic history and is supposedly known only from holotype seven specimens Río Apa, Paraguay, by Alfredo Borelli 1893–1894. Examination Steindachner's Borelli's revealed that they are not conspecific, E. junior synonym Physalaemus biligonigerus (Cope, 1861 “1860”), could be...
We present an annotated list of the herpetofauna at Protected Area Quebrada de los Cuervos, Departamento Treinta y Tres, Uruguay. recorded 24 species amphibians and 29 reptiles, accounting for near half already reported from New records Dendropsophus minutus (Hylidae) Liophis almadensis (Colubridae) are presented, being southernmost known these species. Additionally, Melanophryniscus sanmartini (Bufonidae), Anisolepis undulatus (Polychridae), Crotalus durissus terrificus (Viperidae) Xenodon...
We describe the external morphology, buccal cavity, chondrocranium, hyobranchial skeleton, and musculature of tadpole Rhinella achavali (Achaval's Toad), along with its karyotype. Tadpoles were found in a small, permanent stream showing schooling behavior. The characterization proposed species groups within cannot be currently improved using larval as it seems to much conserved this genus. Buccal cavity morphology confirms distinctiveness veraguensis (Veragua Toad) group respect other known...
Demographic studies on crocodilians in subject to strong human disturbance habitats are scarce, particularly the Neotropical Region. This work provides first survey data of abundance and population size structure a neotropical caiman, Caiman latirostris, disturbed northwestern Uruguay (30°S, 57°W). We conducted nocturnal surveys agriculture impoundments (2–116 ha) Ñaquiñá Lenguazo stream basins during summer, from 2001 2004. About 81% were inhabited by with relative indices between 2.1 4.4 ×...