Results 21 to 30 of about 274 (168)

A dozen of new species of orchid bees (Hymenoptera: Euglossini) from Brazil and Ecuador

Revista Chilena de Entomología
New species of orchid bees, eleven from Brazil and one from Ecuador, are here described, two in the genus Eufriesea (Ef. aequatoriana sp. nov. and Ef. patrice sp. nov.), seven in Euglossa (Euglossa) (Eg. aeneolusa sp. nov., Eg. caruaruensis sp. nov., Eg.
Marcio Luiz de Oliveira
doaj   +1 more source

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

The 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, Keila Xavier Magalhães, Thiago Nilton A. Pereira, Janice Muriel‐Cunha, Alberto Akama   +4 more
wiley   +1 more source

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

The 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, Sandriely F. Marcondes, Mayara S. Siqueira, Taynara R. F. Leão, Robson A. Rodrigues, Karine N. N. Farias, André L. N. Silva, Karin Virgínia Kuibida, Lilian Franco‐Belussi, Carlos E. Fernandes   +9 more
wiley   +1 more source

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

Intropica
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, Roberto J. Guerrero Florez   +1 more
doaj   +1 more source

Trypanosoma madeirae sp. n.: A species of the clade T. cruzi associated with the neotropical common vampire bat Desmodus rotundus

International Journal for Parasitology: Parasites and Wildlife, 2019
Molecular phylogenetic studies have revealed the growing diversity of bat trypanosomes. Here, 14 isolates from blood samples of the vampire bat Desmodus rotundus (Phyllostomidae) from Rio de Janeiro, Southeast Brazil, were cultivated, and morphologically
Juliana H.S. Barros, Luciana Lima, Armando O. Schubach, Marta M.G. Teixeira   +3 more
doaj   +1 more source

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

The 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, Humberto L. Andrelino, Sergio Bogan, José P. O'Gorman, Federico Agnolín, Brian L. Sidlauskas, Nahuel Vega, Agustín G. Martinelli, José L. Birindelli   +8 more
wiley   +1 more source

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

Biota 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, Gabriel Rodolfo Navas Suárez, Adriana Bermúdez Tobón, Néstor Hernando Campos Campos   +3 more
doaj   +1 more source

Four new species of the spider genus Physocyclus Simon, 1893 (Araneae: Pholcidae) from Mexico, with updated taxonomic identification keys

European Journal of Taxonomy, 2022
Four new species of the spider genus Physocyclus Simon, 1893 are described from Mexico. Two species are described based on male and female adult specimens: Physocyclus mariachi sp. nov. and P. sikuapu sp. nov.
Garduño NOLASCO Samuel, Alejandro VALDEZ-MONDRAGÓN   +1 more
doaj   +1 more source

Morpho‐functional analyses of the jaw apparatus in the Blue‐and‐yellow Macaw (Ara ararauna, Psittaciformes, Aves): Adaptations to feeding behavior

The Anatomical Record, EarlyView.
Abstract Macaws are renowned for processing dry, mechanically resistant fruits, yet the species‐level anatomical and functional correlates of this performance remain incompletely resolved. We examined the feeding apparatus of the Blue‐and‐yellow Macaw (Ara ararauna) using an integrated approach that combines osteology, myology, and bite‐force estimates
Sérgio R. Posso, Ana Caroline M. Barbosa, Victor R. Caciatori   +2 more
wiley   +1 more source

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

Memorias 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