Results 61 to 70 of about 62,404 (240)

Malignant melanoma of the urethra: a rare histologic subdivision of vulvar cancer with a poor prognosis [PDF]

open access: yes, 2012
Malignant melanoma of the urethra is a rare tumour that is difficult to diagnose and treat, resulting in a poor prognosis. In this paper, we present the case of a 65-year-old woman who was referred to a gynaecologist because of a urethral mass that ...
Alkatout, Ibrahim   +8 more
core   +2 more sources

Assembling the Neotropical Tree Flora: Andean Uplift and the Historical Biogeography of the Brazil Nut Family (Lecythidaceae)

open access: yesJournal of Biogeography, Volume 53, Issue 4, April 2026.
ABSTRACT Aim The assembly of tropical tree floras is complex, involving many lineage‐specific histories; however, focusing on the biogeographic history of diverse clades can reveal general patterns. We investigated the historical biogeography of the ecologically important Brazil nut clade (Lecythidoideae) to: (1) expand prior phylogenies with greater ...
Diana Medellín‐Zabala   +8 more
wiley   +1 more source

New species of Eleutherodactylus of Colombia (Amphibia: Leptodactylidae). I: five new species from the paramos of the Cordillera Central New species of Eleutherodactylus of Colombia (Amphibia: Leptodactylidae). I: five new species from the paramos of the Cordillera Central

open access: yesCaldasia, 1980
Se describen aquí las nuevas especies Eleutherodactylus obmutescens, E. racemus y E. simoterus, del grupo unistrigatus, provenientes de los Páramos de Puracé, Las Hermosas y Letras, respectivamente, en la Cordillera Centralde Colombia. Estas especies son
Lynch John D.
doaj  

A taxonomic review of the neotropical genus Coprophanaeus Olsoufieff, 1924 (Coleoptera: Scarabaeidae, Scarabaeinae) [PDF]

open access: yes, 2010
The Neotropical genus Coprophanaeus Olsoufieff (1924), as classified here, comprises 38 species distributed among three subgenera (Megaphanaeus Olsoufieff, Metallophanaeus Olsoufieff, and Coprophanaeus s. str.) and eight species groups.
Edmonds, William David, Zídek, Jiri
core   +2 more sources

The making of pure quartzose sand in continental interiors: Paraná River (Brazil and Argentina)

open access: yesSedimentology, Volume 73, Issue 3, Page 802-837, April 2026.
ABSTRACT As part of a comprehensive project on sedimentary processes in South America, this study focuses on sediment generation in the intracratonic Paraná Basin and monitors the evolution of sand composition along the Paraná River from central Brazil to the Río de la Plata estuary in Argentina.
Eduardo Garzanti   +5 more
wiley   +1 more source

Peces del valle medio del río Magdalena, Colombia

open access: yesBiota Colombiana, 2006
El río Magdalena nace en la cordillera Central de Los Andes de Colombia en la laguna de La Magdalena, a 3685 m.s.n.m. Posee una longitud total de 1538 km. y una cuenca hidrográfica que ocupa 256 622 km2.
José Iván Mojica   +4 more
doaj   +2 more sources

Centrolene savagei [PDF]

open access: yes, 2017
Number of Pages: 11Geological SciencesIntegrative ...
Ospina-L., Ana M.   +3 more
core   +1 more source

Golden Gate Bridge, as Always? Eliciting Prototypical Places From Autoregressive Large Language Models via Category Production

open access: yesTransactions in GIS, Volume 30, Issue 2, April 2026.
ABSTRACT Among the various theories of categorization, Eleanor Rosch's prototype theory stands out as both influential and contested. In contrast to the classical theory of concepts, prototype theory posits that humans conceptualize the world using category structures where exemplars vary in their degree of membership.
Zilong Liu   +5 more
wiley   +1 more source

Estudio de la anurofauna del municipio de Ibagué

open access: yesActa Biológica Colombiana, 2000
Colombia es considerada, en el mundo, el país más rico en especies de anfibios (Lynch, 1998). De las 4.300 especies registradas en el planeta, Colombia presenta 583 (Ruiz et al., 1996).
M. H. Bernal   +4 more
doaj  

Prospección geoquímica y génesis del mercurio en el flanco occidental de la cordillera Central de Colombia: municipios de Aránzazu, Salamina y Pacora, departamento de Caldas

open access: yesBoletín Geológico, 1984
El flanco occidental de la cordillera Central de Colombia, en el sector comprendido entre los municipios de Aránzazu, Salamina y Pácora en el departamento de Caldas, se realizó un programa de prospección geoquímica y geología que se cumplió en tres ...
Hernando Lozano Q.   +2 more
semanticscholar   +1 more source

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