Results 41 to 50 of about 3,473 (314)

NEOTROPICAL CARNIVORES: a data set on carnivore distribution in the Neotropics [PDF]

open access: yesEcology, 2020
AbstractMammalian carnivores are considered a key group in maintaining ecological health and can indicate potential ecological integrity in landscapes where they occur. Carnivores also hold high conservation value and their habitat requirements can guide management and conservation plans.
Mariana Nagy‐Reis   +690 more
openaire   +4 more sources

Morphological variation in atlas and axis of Neotropical spiny rats (Rodentia, Echimyidae)

open access: yesThe Anatomical Record, EarlyView.
Abstract The unique morphologies of the first two cervical vertebrae, the atlas and axis, represent a significant innovation in mammalian evolution. These structures support the weight of the head and enable intricate movements of the head and neck.
Thomas Furtado da Silva Netto   +3 more
wiley   +1 more source

The five-legged ant: first record of teratology in Nesomyrmex asper (Mayr, 1887) (Hymenoptera: Formicidae)

open access: yesIntropica
Se presenta el primer caso teratológico de Nesomyrmex asper, caracterizado por una anomalía asimétrica manifestada en la ausencia de la pata media izquierda y un crecimiento desproporcionado de la mesopleura.
Brandon Steve Arredondo Hoyos   +1 more
doaj   +1 more source

Lista de chequeo de las familias Galatheidae y Chirostylidae (Crustacea: Decapoda: Anomura) del Neotrópico

open access: yesBiota Colombiana, 2008
Galatheidae and Chirostylidae are two of the most diverse and abundant families of decapod crustaceans, besides penaeid shrimps. These families contain 869 species around the world and live from shallow waters (less common), marine bottoms on continental
Margarita Fierro Rengifo   +3 more
doaj   +1 more source

Leucocoprinus rhodolepis (Agaricaceae: Basidiomycota), a new species from Brazilian semi-arid region

open access: yesRevista Mexicana de Biodiversidad, 2022
A novel Leucocoprinus species was collected from the semi-arid region of Brazil in the Caatinga domain. Leucocoprinus rhodolepis is described based on morphological data.
Nathália U. Ferretti-Cisneros   +2 more
doaj   +1 more source

First notice of Therion from South America with description of two new species from Argentina and Bolivia (Hymenoptera: Ichneumonidae) [PDF]

open access: yes, 1999
Therion Curtis (Ichneumonidae: Anomalinae) has a nearly cosmopolitan geographic distribution but has not previously been recorded from South America. In most Therion the tarsal claws are simple or have only a few inconspicuous teeth near the base.
Porter, Charles C.
core  

Neuroanatomical diversity in Teleocichla with new volumetric and histological insights into the encephalon of Teleocichla monogramma Kullander 1988

open access: yesThe Anatomical Record, EarlyView.
Abstract Teleocichla comprises small cichlids that inhabit the rapid streams of Amazonian rivers; however, there has been limited research on their encephalon morphology. This study examined the neuroanatomy of four species, focusing on volumetric measurements of their encephalon subregions, and providing a histological description of the encephalon of
Renan Leão‐Reis   +4 more
wiley   +1 more source

Speculations on the origin and evolution of the genus Leishmania [PDF]

open access: yesMemorias do Instituto Oswaldo Cruz, 2000
Recently two hypotheses have been proposed for the evolution of Leishmania involving respectively a Neotropical or Paleartic origin for the species. Here an alternative proposal on the phylogeny of Leishmania based on the major divisions within the genus
Hooman Momen, Elisa Cupolillo
doaj   +1 more source

Hepatic morphology and serum biochemical profile according to dry and rainy seasons in Pygocentrus nattereri (Characiformes: Serrasalmidae)

open access: yesThe Anatomical Record, EarlyView.
Abstract This study investigated the physiological and morphological adaptations of the liver of the carnivorous fish Pygocentrus nattereri (piranha) in response to seasonal variations (dry and rainy seasons) in the Brazilian Pantanal. The objective was to describe how the liver, a central organ in metabolic regulation, responds to environmental ...
Maria Eduarda Corona Garcia   +9 more
wiley   +1 more source

MicroCT reinvestigation of the only articulated fossil anostomid fish reveals synonymy of Arhinolemur Ameghino, 1898 and Megaleporinus Ramirez et al., 2017

open access: yesThe Anatomical Record, EarlyView.
Abstract Arhinolemur scalabrinii† Ameghino, 1898 was originally described as a strepsirrhine primate (Mammalia) but has been recognized as an anostomid fish since 2012. It remains the only extinct anostomid species known from complete cranial material.
Karen M. Panzeri   +8 more
wiley   +1 more source

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