Results 31 to 40 of about 39,439 (207)

Dental crown morphological variation and heterodonty in carcharhiniform sharks

The Anatomical Record, EarlyView.
Abstract Elasmobranch teeth are highly mineralized structures that constitute the majority of the fossil record for this group. Despite their taxonomic and evolutionary significance, detailed descriptions of dental morphology remain scarce. The order Carcharhiniformes, the most diverse among sharks, comprises 304 valid species that display remarkable ...
Flávia Zanini, Karla D. A. Soares
wiley   +1 more source

Avifauna de la comunidad de La Lumbrera (Cieneguilla), Aguascalientes, Aguascalientes, México

Tecnociencia Chihuahua, 2019
Hasta el momento se han realizado pocos trabajos sobre avifauna en Aguascalientes y es necesario realizar más estudios que permitan ampliar el conocimiento acerca de la riqueza de especies de aves presentes en el estado.
Moisés Arellano Delgado, Francisco Guerra Quesada, Florencia Cabrera, Manuel Higinio Sandoval Ortega, Hugo Noé Araiza Arvilla   +4 more
doaj  

Ictiólogos de la Argentina : Eduardo Ladislao Holmberg [PDF]

, 2008
Fil: López, Hugo Luis. División Zoología Vertebrados; Facultad de Ciencias Naturales y Museo; Universidad Nacional de La PlataFil: Miquelarena, Amalia María.
López, Hugo Luis, Miquelarena, Amalia María, Ponte Gómez, Justina   +2 more
core  

An unusual titanosaur axis from the Upper Cretaceous of Brazil and its significance for sauropod anatomy and systematics

The Anatomical Record, EarlyView.
Abstract The Upper Cretaceous São José do Rio Preto Formation (Bauru Group, southeastern Brazil) has yielded a fragmentary but taxonomically diverse record of titanosaur sauropods, although elements from cervical series remain scarce. Here, we describe a nearly complete sauropod axis from the Vila Ventura Paleontological Area, representing an uncommon ...
Bruno A. Navarro, Jeffrey A. Wilson Mantilla, Jhonata H. A. Martins, Fabiano V. Iori, Leonardo S. Paschoa, Alberto B. Carvalho, Joseli M. Piranha, Hussam Zaher   +7 more
wiley   +1 more source

Ictiólogos de la Argentina : Sara Beatríz Sverlij [PDF]

, 2012
Fil: López, Hugo Luis. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo. Universidad Nacional de La Plata; ArgentinaFil: Padin, Oscar Horacio. División Zoología Vertebrados. Facultad de Ciencias Naturales y Museo.
López, Hugo Luis, Padin, Oscar Horacio, Ponte Gómez, Justina   +2 more
core  

Much more than their fangs: Macroscopic anatomy of the brain of Bothrops moojeni Hoge 1966 (Squamata, Serpentes, Viperidae)

The Anatomical Record, EarlyView.
Abstract Neuroanatomical research has progressed considerably in several vertebrate lineages, yet studies of reptilian brain morphology remain markedly underdeveloped. Here we provide the first description of macroscopic brain anatomy and its ontogeny in the viperid Bothrops moojeni, based on a sample of seven individuals.
Paula Araújo, Júlio César Costa de Souza, Angele Martins   +2 more
wiley   +1 more source

Posibles contribuciones de la bioingeniería a la fisiología del comportamiento

Acta Zoológica Lilloana, 1979
Se presenta cómo ve aspectos típicamente biológicos un ingeniero y cómo puede la Bioingeniería contribuir con su metodología al adelanto futuro de la Biología.
M. E. Valentinuzzi
doaj  

Lack of Population Structure of an Extreme Migratory Shorebird: Evidence of Gene Flow Between Geographically Disparate Populations. [PDF]

Ecol Evol
Gene flow is key to understand the population connectivity of a given species, specially when small and segregated populations threaten its conservation. In this study we explored the population structure of the Hudsonian Godwit (Limosa haemastica), a long‐distance migratory shorebird.
Gherardi-Fuentes C, Ruiz J, Senner NR, Johnson JA, Masero JA, Gutiérrez J, Verdugo C, Navedo JG.   +7 more
europepmc   +2 more sources

Lista comentada de los peces continentales de la Argentina [PDF]

, 2003
Fil: López, Hugo Luis. División Zoología Vertebrados; Facultad de Ciencias Naturales y Museo; Universidad Nacional de La PlataFil: Miquelarena, Amalia María.
López, Hugo Luis, Menni, Roberto Carlos, Miquelarena, Amalia María   +2 more
core  

Evaluating the Air Respiratory Capacity of Awaous (Chonophorus) tajasica (Gobiiformes: Oxudercidae): A Morpho‐Functional Study

Journal of Experimental Zoology Part A: Ecological and Integrative Physiology, EarlyView.
We demonstrated that Awaous tajasica performs facultative air breathing under experimental conditions of dissolved oxygen limitation, retaining air bubbles in the buccal cavity during gill ventilation. Morpho‐functional evidence indicates the use of atmospheric oxygen as a respiratory support under conditions of low water oxygenation.
João Pedro Trevisan, Diego Venturelli, Wilfried Klein, André Luis da Cruz   +3 more
wiley   +1 more source