A5065139811- Paleontology and Evolutionary Biology
- Evolution and Paleontology Studies
- Ichthyology and Marine Biology
- Wildlife Ecology and Conservation
- Avian ecology and behavior
- Primate Behavior and Ecology
- Marine animal studies overview
- Bat Biology and Ecology Studies
- Fish biology, ecology, and behavior
- Comparative Animal Anatomy Studies
- Mediterranean and Iberian flora and fauna
- Morphological variations and asymmetry
- Environmental and Cultural Studies in Latin America and Beyond
- Cephalopods and Marine Biology
- Animal Ecology and Behavior Studies
- Scarabaeidae Beetle Taxonomy and Biogeography
- Coconut Research and Applications
- Botany and Geology in Latin America and Caribbean
- Species Distribution and Climate Change
- Marine and fisheries research
- Mollusks and Parasites Studies
Fundación Biodiversidad
2007-2016
Institut Français
2003-2008
Center for Southeast Asian Studies
2007
Asociación para la Conservación de la Cuenca Amazónica
2005
National University of San Marcos
2003-2004
Fundacion Venezolana de Investigaciones Sismologicas
2002
New penguin fossils from the Eocene of Peru force a reevaluation previous hypotheses regarding causal role climate change in evolution. Repeatedly it has been proposed that penguins originated high southern latitudes and arrived at equatorial regions relatively recently (e.g., 4-8 million years ago), well after onset latest Eocene/Oligocene global cooling increases polar ice volume. By contrast, new discoveries middle late reveal invaded low >30 earlier than prior data suggested, during one...
Se describen elementos craneales atribuibles a una nueva especie del género Spheniscus, procedentes Mioceno tardío de la Formación Pisco, en costa centro-sur Perú. Esta se caracteriza por tener un rostrum, relación con el cráneo, proporcionalmente mayor que observado las demás especies género. Finalmente, discute brevemente sobre valor adaptativo los caracteres observados.
Boobies and gannets (family Sulidae) are the most specialized plunge divers among seabirds.Their fossil record along Pacific coast of South America extends to early Middle Miocene.Here we describe three new species sulids: Sula brandi sp.nov., figueroae Ramphastosula aguirrei from Late Miocene Pisco Formation (Peru).Two them relatives living genus Sula, which represents medium large-sized boobies.A extinct is also described, adding discussion possible alternative feeding strategies...
El oso andino (Tremarctos ornatus) es una especie en situación vulnerable, cuyo hábitat se va fragmentando poco a por la expansión de las actividades humanas. En el Perú, bosque seco del Marañón, ecorregión investigada nivel biológico y ecológico, también especie. Lamentablemente, actualidad está siendo afectada agricultura, ganadería construcción vías comunicación, futuro cercano verá amenazada implementación económicas gran envergadura, como centrales hidroeléctricas. Con objetivo...
Se examina el registro neógeno de la extinta familia Pelagornithidae en las Formaciones Pisco (Perú) y Bahía Inglesa (Chile) costa pacífica América del Sur. reportan nuevos especímenes pertenecientes al género Pelagornis, procedentes los niveles Sacaco Aguada Lomas Formación Pisco, nivel fosfático Inglesa. Asimismo se presentan elementos craneales postcraneales indeterminado Montemar base misma, límite entre Cerro Bruja Chilcatay. compara presente con últimos antecedentes conocidos para...
Abstract We report the oldest fossil condor (Vulturidae) from South America and first Pisco Formation (14.0–2.0 Ma) of Peru, described herein as Perugyps diazi new genus species. The Formation, exposed on southern coast has produced well-preserved abundant marine terrestrial vertebrate fossils late Miocene/early Pliocene (6.0–4.5 Montemar Sacaco Sur localities, where P. was recovered. adds to our knowledge evolution biogeographic distribution New World vultures. age this species supports...
We report the discovery of a partial skeleton oldest spectacled bear (Tremarctos ornatus) known to date. It was found at 2,950 m elevation in Chaquil cave, Departamento de Amazonas, north central Peru. Its age, as determined by accelerated mass spectrometry conventional radiocarbon dating, was, within 50 years, 5,980 years before present (YBP). After standard correction for Holocene irregularities atmospheric 14C (carbon 14) levels, this age translates into calendar about 6,790 present....
ABSTRACT Cranial material from a new genus (Ramphastosula) of Sulidae is described. The comes the Early–Lower Pliocene Pisco Formation central-southern coast Peru. skulls are characterized by (1) remarkable convex curvature dorsal surface and straight ventral rostrum, only with on third anterior part tip bill; (2) well developed occipital temporal regions; (3) broad opisthotic process projecting to level postorbital processes; (4) fossa, (5) flat braincase robust frontal region.
Evaluations in situ, interviews, literature review and database of museums zoos were performed, with the aim identifying areas Andean bear Tremarctos ornatus records Peruvian sector Vilcabamba-Amboro Conservation Corridor.Bear presence was reported several regions Ayacucho, Junin, Cuzco, Madre de Dios Puno, including protected areas: Ashaninka, Machiguenga Amarakaeri Communal Reserves, Otishi, Manu Bahuaja Sonene National Parks, Megantoni Sanctuary, Machu Picchu Historic Choquequirao...
We described and illustrated the skull jaw of andean bear Tremarctos ornatus, comparatively analyzing among individuals different ages sexes, adults other species Ursidae.In ontogenetic level, we found following morphological changes associated with senescence: obliteration sutures, crests development, widening zygomatic arches frontalized orbits, muzzle occipital region elongation, tooth wear.We also that as length between front edge premolar 4 rear molar 2 in is most stable.This allowed to...
Abstract We report the oldest fossil condor (Vulturidae) from South America and first Pisco Formation (14.0–2.0 Ma) of Peru, described herein as Perugyps diazi new genus species. The Formation, exposed on southern coast has produced well-preserved abundant marine terrestrial vertebrate fossils late Miocene/early Pliocene (6.0–4.5 Montemar Sacaco Sur localities, where P. was recovered. adds to our knowledge evolution biogeographic distribution New World vultures. age this species supports...
El presente articulo describe la morfologia del craneo piquero peruano Sula variegata (Tschudi, 1845), considerando su desarrollo ontogenico, y en comparacion con otras especies de familia Sulidae y, forma complementaria, familias tradicional orden Pelecaniformes: Phalacrocoracidae, Anhingidae, Fregatidae, Phaetonthidae Pelecanidae. En las comparaciones realizadas se pudieron encontrar caracteristicas que comparte el los demas miembros Sulidae, que, conjunto, lo diferencian genero Sula....
We report the oldest record of genus Palaeolama in Peru; its constitutes one records for South America. The shape and size fossil material is comparable to American forms P. (Hemiauchenia) paradoxa smallest (Palaeolama) weddellii. bones were found within unnamed littoral marine deposits near Atiquipa, on south coast Peru. occurrence extinct bivalve mollusk, Chlamys vidali, at base section coquinas exclusively extant mollusks highest terrace capping indicates an age about two million years....
El 21 de diciembre 2008, el equipo del Museo Historia Natural San Marcos, integrado por los senores Niels Valencia, Eusebio Diaz, Rodolfo Salas, Ali Altamirano, Mario Urbina y autor la presente nota, colecto restos fosiles craneo un ave, previamente encontrado Sr. (fig. 1). fosil fue llevado al Departamento Paleontologia Vertebrados dicho museo, en donde preparado Walter Aguirre. Una vez terminada preparacion se pudo identi...
Se describen elementos craneales atribuibles a una nueva especie del género Spheniscus, procedentes Mioceno tardío de la Formación Pisco, en costa centro-sur Perú. Esta se caracteriza por tener un rostrum, relación con el cráneo, proporcionalmente mayor que observado las demás especies género. Finalmente, discute brevemente sobre valor adaptativo los caracteres observados.