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Six populations of  Gymnocalycium paraguayense and G. fleischerianum , endemics of Paraguay and until present considered ad two different species,were studies using macromorphology, micromorphology and molecular data ba...

The fossils of the India Muerta Formation (Neogene, Tucumán Province, Northwestern Argentina) include several vertebrate groups, mainly metatherian, xenarthran, and notoungulate mammals. Nevertheless, these remains have...

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...

Materias / palabras clave: No

Materias / palabras clave: Science

Materias / palabras clave: Science: Biology (General): Evolution; Science: Biology (General): Life

Materias / palabras clave: Science: Science (General); Science: Biology (General): Life; Science: Zoology; Agriculture; Science: Biology (General): Ecology

Materias / palabras clave: Science: Botany

Materias / palabras clave: animal systematics, evolution, animal diversity, conservation, taxonomy; Science: Biology (General); Science: Zoology

Materias / palabras clave: taxonomy, biosystematics, evolution, systematics, life science; Science: Biology (General): Evolution; Science: Biology (General): Life

Materias / palabras clave: biodiversity, plant science, taxonomy, molecular biology, systematics; Science: Botany

Materias / palabras clave: taxonomy, morphology, anatomy, phylogeny (molecular or morphology-based), historical biogeography and palaeontology, arthropods; Science

Materias / palabras clave: insect science, biodiversity, phylogeny, taxonomy, entomology; Science: Science (General); Science: Biology (General): Life; Science: Zoology; Agriculture; Science: Biology (General): Ecology

Materias / palabras clave: zoology, evolutionary biology, population genetics, systematic zoology; Science: Zoology; Science: Biology (General): Evolution

Cystoliths are phytoliths of silica and calcium carbonate and are produced in a few groups of dicotyledonous angiosperms. Anatomical and, more recently, phytolith studies have recorded them in different families. In the ...

This paper serves as a reply to the Commentary by Brown and Gibbons (S Afr J Sci. 2022;118(9/10), Art. #12590) on our recently published paper on systematics of the moon jellyfish genus Aurelia (Lawley et al. PeerJ 2021;...

Dendromonocotylerajidicola n. sp. is described from the dorsal surface of the yellownose skate Zearaja chilensis (Guichenot) (Rajiformes) caught on the Argentine shelf. Dendromonocotylerajidicola n. sp. can be distinguis...

Science carried out in South America has experienced a major rise in the levels of productivity and impact during the last decade. The continuity of this process depends upon strong policy decisions of personnel training...

Six productive samples from the upper part of the Early Carboniferous Ambo Formation at Pongo de Mainique, Peru, are analyzed for 55 recognized miospore species of continental origin. One new morphospecies, Cristatispori...

Background: Panicoideae are the second largest subfamily in Poaceae (grass family), with 212 genera and approximately 3316 species. Previous studies have begun to reveal relationships within the subfamily, but largely la...

Two species of grey foxes are recognized in the Southern Cone of America: Lycalopex griseus, and L. gymnocercus, which were traditionally separated by size and some cranial differences. Morphometric analyses of the skull...

A comprehensive study of the structural, cohesive and electronic properties of several stable, metastable and non-stable intermetallic phases (IPs) of the Ni–In and Ni–Sn systems have been performed by ab initio dens...

Dr. Carla Riva-Rossi has over 25 years’ experience studying the evolutionary ecology of anadromous fishes. She received an MS in biological sciences from the Facultad de Ciencias Naturales, Universidad Nacional de la P...