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Functional New World monkey oxytocin forms elicit an altered signaling profile and promotes parental care in rats
TLDR
It is suggested that Val3Pro8OXT and Pro8Oxt are functional variants, which might have been evolutionarily co-opted as an essential part of the adaptive genetic repertoire that allowed the emergence of taxon-specific complex social behaviors, such as intense parental care in the Cebidae and the genus Saguinus.
A new species of swamp rat of the genus Scapteromys waterhouse, 1837 (Rodentia: Sigmodontinae) endemic to Araucaria angustifolia forest in Southern Brazil.
TLDR
Morphological, molecular, and karyological analysis support the recognition of the new species, distinct from S. aquaticus and S. tumidus, and strongly supported substructure was found within the new taxon, resulting in two reciprocally monophyletic clades.
Phylogenetic and morphological relationships between nonvolant small mammals reveal assembly processes at different spatial scales
TLDR
Evidence of phylogenetic repulsion in one region indicated that other processes beyond environmental filtering are important for community assembly at broad scales, and ecological interactions and environmental filtering seemed important at the local scale, while environmental filtering and historical colonization seemed important forcommunity assembly at broader scales.
A new species of Phyllocnistis Zeller (Lepidoptera: Gracillariidae) from southern Brazil, with life-history description and genetic comparison to congeneric species
TLDR
This is the first species of Phyllocnistis Zeller described from Brazil, and the first leaf-mining gracillariid associated with Passifloraceae.
Cecidonius pampeanus, gen. et sp. n.: an overlooked and rare, new gall-inducing micromoth associated with Schinus in southern Brazil (Lepidoptera, Cecidosidae)
TLDR
Cecidonius pampeanus is a new genus and species of cecidosid moth from the Pampa biome, south Brazil and a phylogeny for Cecidosidae is inferred using sequences from mitochondrial and nuclear loci, and genetic variation and gene flow across ten populations are characterized.
Mitochondrial and nuclear DNA analyses reveal population differentiation in Brazilian Creole sheep.
TLDR
This work investigated the genetic differentiation of two South American Creole sheep phenotypes that historically have been bred in different biomes in southern Brazil and detected 18 unique mtDNA haplotypes, none of which was shared between the two phenotypes.
DNA Barcoding of Sigmodontine Rodents: Identifying Wildlife Reservoirs of Zoonoses
TLDR
It is emphasized that DNA barcoding should be used in combination with other taxonomic and systematic procedures in an integrative framework and based on properly identified museum collections, to improve identification procedures, especially in epidemiological surveillance and ecological assessments.
Larval feeding choices in heliconians: induced preferences are not constrained by performance and host plant phylogeny
TLDR
It is found that feeding preference could be induced for most host plant species tested, in the fifth instar in particular, suggesting that habituation is involved in such cases, and there was no indication of the existence of host plant phylogenetic constraints.
Ancestry analysis of locally adapted Crespa goats from southernmost Brazil.
TLDR
Results indicate that this distinctive source of genetic diversity is partly a remnant of animals that were introduced during the colonial period, and provide further support for the protection of this particular gene pool.
Sequence variation in the melanocortin-1 receptor (MC1R) pigmentation gene and its role in the cryptic coloration of two South American sand lizards
TLDR
The coding region of the melanocortin-1-receptor (MC1R) gene is analyzed and therefore its role underlying the dorsal color variation in two sympatric species of sand lizards that inhabit the southeastern coast of South America is analyzed, indicating that MC1R is not involved in the pigmentation pattern observed in Liolaemus lizards.
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