Results 41 to 50 of about 386 (98)

The Slow‐Rotating Nucleus of Comet C/2013 R1 (Lovejoy)

Astronomische Nachrichten, Volume 346, Issue 5, June 2025.
ABSTRACT The close approach of comet C/2013 R1 (Lovejoy) allowed us to conduct an in‐depth study of the morphology of the inner coma. From the measurement of the dust emission structures expanding near the cometary nucleus in November–December 2013, we derived a slow rotation period of 47.8±1.2$$ 47.8\pm 1.2 $$ h.
Federico Manzini, Virginio Oldani, Andrea Farina, Paolo Ochner, Andrea Reguitti, Luigi R. Bedin, Jean Gabriel Bosch, Erik Bryssinck, Roberto Crippa, Stéphan Gaumont‐Guay, Carl W. Hergenrother, Joel Nicolas, Ivo Scheggia   +12 more
wiley   +1 more source

Recent Long‐Distance‐Dispersal Explains the Range Disjunction of the Old‐Word Cockleburs (Xanthium strumarium)

Journal of Biogeography, Volume 52, Issue 5, May 2025.
ABSTRACT Aim In the present study, we focused in addressing questions concerning the biogeographic history of Xanthium strumarium, an Old World native species whose close relatives are generally all native to the American continent. Location The species distribution covers the Eurasian continent and some African regions and close islands.
Eleonora Manzo, Salvatore Tomasello
wiley   +1 more source

Ultraconserved element (UCE) phylogenomics illuminates the evolutionary history and biogeography of Dorymyrmex pyramid ants

Systematic Entomology, Volume 50, Issue 2, Page 325-348, April 2025.
A newly expanded UCE phylogeny of Dorymyrmex robustly confirms the major lineages and recommends a new scheme of four major species groups. The asymmetrical, amphitropical distribution of Dorymyrmex was likely created by a single dispersal event across the Isthmus of Panama before the traditional closure date of 3 Mya.
Jill T. Oberski
wiley   +1 more source

Multilingüismo en el área de San Pedro de Atacama. Lenguas aborígenes atestiguadas por la fitonimia del área de San Pedro de Atacama

Estudios atacameños, 1998
La fitonimia en el área de San Pedro de Atacama proporciona evidencia de que, en el pasado, se hablaron tres lenguas aborígenes: quechua, aymara y kunza. Esta, hoy en día extinguida, fue la lengua de los antiguos atacameños. Los fonemas originales glotalizados bilabial /pæ/, dental /tæ/, palatal /æ/, velar /kæ/ y postvelar /qæ/ fueron sustituidos, en ...
openaire   +3 more sources

Resolving the early‐diverging clades of Loasaceae subfam. Loasoideae – Segregating the new genus Prosa from the Atacama Desert genus Huidobria

TAXON, Volume 74, Issue 1, Page 101-116, February 2025.
Abstract Huidobria, an enigmatic genus in the Loasaceae family, has long puzzled botanists due to its unclear phylogenetic position and morphological distinctiveness within Loasaceae. Focusing on its two species, H. chilensis and H. fruticosa, we employed the Angiosperms353 target probe set alongside a comprehensive morphological evaluation to resolve ...
Rafael Acuña‐Castillo, Tim Böhnert, Julius Jeiter, Maximilian Weigend   +3 more
wiley   +1 more source

Aguas, riego y cultivos: cambios y permanencias en los ayllus de San Pedro de Atacama

Estudios Atacameños, 2015
El agua ha sido vital en el desarrollo histórico en los ayllus de San Pedro de Atacama, regados por los ríos San Pedro y Vilama. Los aportes hí­dricos de estos ríos han venido disminuyendo desde la década de 1940 en adelante, lo que ha supuesto cambios ...
Isabel Sepúlveda Rivera, Raúl Molina Otárola, María del Mar Delgado-Serrano, José Emilio Guerrero Ginel   +3 more
doaj   +8 more sources

Systematic meteorite collection in the Catalina Dense Collection area (Chile): Description and statistics

Meteoritics &Planetary Science, Volume 60, Issue 2, Page 308-323, February 2025.
Abstract We present the outcome of search campaigns conducted in the Catalina Dense Collection area (DCA) located in the central depression of the Atacama Desert, Chile. The “Catalina Systematic Collection” (CSC) was assembled through systematic on‐foot searches, resulting in a total of 1599 meteorites, before pairing, collected over a surface of 6.80 ...
Carine Sadaka, Jérôme Gattacceca, Matthieu Gounelle, Mathieu Roskosz, Anthony Lagain, Romain Tartese, Lydie Bonal, Clara Maurel, Rodrigo Martinez, Millarca Valenzuela   +9 more
wiley   +1 more source

Endemism Centres of the Five Richest Vascular Epiphyte Families in the Neotropics

Journal of Biogeography, Volume 52, Issue 1, Page 80-91, January 2025.
ABSTRACT Aim Endemic species, characterised by limited geographic ranges, face a high risk of extinction. The neotropical region harbours diverse ecosystems and a substantial number of endemic species, thus identifying areas of high endemism is crucial for protecting unique and threatened species and ecosystems.
Maria Judith Carmona‐Higuita, Glenda Mendieta‐Leiva, Jorge Antonio Gómez‐Díaz, Fabricio Villalobos, Flavio Nunes Ramos, João Pedro Costa Elias, Derio Antonio Jiménez‐López, Alejandro Zuluaga, Bruce Holst, Michael Kessler, Guido Mathieu, Alexander Zizka, Gerhard Zotz, Thorsten Krömer   +13 more
wiley   +1 more source

Is it all Phacelia pinnatifida? Molecular delimitations and taxonomic revision of Phacelia sect. Glandulosae in South America based on ddRADseq

TAXON, Volume 73, Issue 6, Page 1437-1459, December 2024.
Abstract Phacelia sect. Glandulosae, with ca. 62 taxa, is the most diverse of the 11 sections of the genus Phacelia (Hydrophyllaceae). The family is largely restricted to North and Central America, but the genus Phacelia has an amphitropical distribution with nine species reported from western South America, five of which have been assigned to P. sect.
Maria‐Anna Vasile, Tim Böhnert, Nataly O'Leary, Maximilian Weigend   +3 more
wiley   +1 more source

Introducción al trabajo de la Dra. Myriam Tarragó de Font

Estudios Atacameños, 1976
¿Cómo agradecer a la Dra. Myriam Tarragó de Font por su estudio tan completo y detallado? Desgraciadamente este importante aporte científico estaba ya casi listo en el tiempo del Congreso de Americanistas en Mar del Plata (1966) y permanecía inédito ...
Gustavo Le Paige de Walque
doaj   +1 more source