Buscar recursos académicos

Gracilisuchus stipanicicorum Romer, 1972a, the only species in its genus, is a small basal suchian, recovered from the Middle?Late Triassic Chañares Formation (La Rioja, Argentina). This species has been interpreted as ...

Abstract The myxozoan Henneguya friderici is a parasite of the gills, intestine, kidney and liver of Leporinus friderici, a characiform fish belonging to the family Anostomidae. Forty-two specimens of L. friderici that h...

Abstract Rhynchostylis orchids are native to Thailand and have considerable commercial importance. However, species delimitation remains difficult because of overlapping morphology, environmental plasticity, short flower...

The record of the genus Tapirus in South America is associated with the faunistic events of the Great American Biotic Interchange (GABI). The taxon is considered an immigrant of Holarctic origin. Although remains are sca...

We developed a new multiplexed-PCR assay to accurately classify Mycobacterium tuberculosis complex (MTC) isolates at the sublineage level by single nucleotide polymorphisms (SNPs). This method relies on 7 SNPs located in...

The diazabicyclooctane (DBO) inhibitor avibactam (AVI) reversibly inactivates most serine β-lactamases, including the CTX-M β-lactamases. Currently, more than 230 unique CTX-M members distributed in five clusters with ...

This article describes the first fossils recorded in the Hernandarias Formation (Pleistocene) in Entre Ríos province (eastern Argentina). They are represented by three teeth assigned to the caviomorph rodents (Rodentia,...

Cavernicolous species that exhibit a high degree of troglomorphism often provide some of the most intriguing evolutionary riddles. For such taxa, the correct systematic arrangement is difficult to determine and becomes p...

The Deseado Massif, which is located in the western part of the Santa Cruz Province, Argentina, contains numerous hot spring deposits related to the final stages of the Bahía Laura Complex. The aim of this study is to a...

The New World suboscines (Passeriformes and Tyrannides) are one of the biggestendemic vertebrate radiations in South America, including the families Furnariidaeand Tyrannidae. Avian brain morphology is a reliable proxy t...

Over more than six decades of dedicated research, Chang Meemann’s career has spanned a critical era marked by a paradigm shift in vertebrate evolution studies. Beginning in the 1950s, inspired by the pioneering ichthyo...

Abstract Background Carbapenem-resistant Citrobacter freundii is increasingly reported and recognized as an opportunistic host of mobile carbapenemase-encoding elements in healthcare-associated settings. However, lineage...

Abstract Gymnodiptychus pachycheilus, a specialized schizothoracinae fish, exhibits remarkable morphological regression, such as near-complete scale loss, making it an important model for understanding the genomic basis ...

Abstract The nematode Ditylenchus destructor comprises multiple haplotypes with distinct host preferences, while the genetic basis remains unclear. We generate three genomes (Haplotypes A, B, and C) using hybrid assembly...

Em uma revisão recente sobre o conceito de bem-estar em peixes, defendo que a preocupação sobre o bem-estar desses animais é definitivamente uma questão genuína, sendo nosso desafio a busca de métodos válidos par...

Sideroxylon obtusifolium (Humb. ex Roem. & Schult.) T.D. Penn. is a tree species belonging to the Sapotaceae family, whose black berries can be consumed fresh or as jam. It is widely distributed in Mexico, Belize, Costa ...

Abstract Infectious disease diagnostics has been transformed by metagenomic next‐generation sequencing (mNGS), an unbiased approach that detects bacteria, viruses, fungi, and parasites in a single assay. By sequencing ...

Toxocara alienata infects racoons and wild pigs in South America and its taxonomy is important to distinguish thespecies from closely related zoonotic congeners, such as T. canis. This study provides the first genetic ch...

The accurate identification of taxa of Aotus is essential for 1) the development of precise biomedical assays, 2) the determination of potential illegal traffic of this genus, and 3) conservation. Although many studies h...

Abstract For the first time in Brazil, Contracaecum australe is recorded parasitizing Phalacrocorax brasilianus (Aves, Suliformes, Phalacrocoracidae) from the Marine Extractive Reserve of Soure on Marajó Island, Brazili...

The Modern Synthesis was not widely adopted by paleoanthropologists until the 1950s, but the perception has been that this event had important theoretical and methodological consequences for the study of hominid evolutio...

ABSTRACT The bacterial flagellar filament acts as a propeller to drive most bacterial swimming. The filament is made of flagellin, known as FliC in Escherichia coli. FliC consists of four domains, the highly conserved co...

Abstract Bile salt hydrolase (BSH: EC.3.5.1.24) has been used as a biomarker for probiotics for an extended period. It is mostly present in the gut environment of vertebrates. Additionally, it influences the viability of...

The ligule is an important character in the taxonomic delimitation of Selaginella species. Here, the morphology of this organ is described in 11 American species. Four of these species are xerophytic: Selaginella convolu...