scholarly journals Paleo American finds from Venezuela: evidence to discuss the spread of Fell Points and the peopling of Northern South America

2016 ◽  
Vol 29 (45) ◽  
pp. 212 ◽  
Author(s):  
Hugo G. Nami
Keyword(s):  
South America ◽  
Continental Shelf ◽  
Additional Data ◽  
Caribbean Sea ◽  
Hunter Gatherers ◽  
Human Dispersal ◽  
Manufacturing Procedure ◽  
Human Colonization ◽  
The Caribbean ◽  
Northern South America

 “Fishtail” or just “Fell” points represent an excellent marker to know and discuss the existence of colonizers hunter-gatherers living in Central and South America during the end of the Pleistocene at about 11000-10000 14C yr BP. Investigations of Venezuelan fishtail points yielded additional data on their manufacturing procedure to help discuss the human colonization of northern South America. The finds from northern Venezuela on the Caribbean Sea yielded a link arguing for the use of the Atlantic slope and the current continental shelf during human dispersal in South America.“Rabo de peixe” ou somente pontas Fell representam um excelente indicador para conhecer e discutir a existência de colonizadores caçadores-coletores que viveram na América Central e do Sul durante o final do Pleistoceno há aproximadamente 11.000-10.000 14C anos AP. Pesquisas com pontas Rabo de peixe da Venezuela proporcionaram dados adicionais sobre o seu processo de fabricação contribuindo na discussão da colonização humana do norte da América do Sul. As descobertas do norte da Venezuela no Mar do Caribe defendem a utilização da vertente Atlântica e da plataforma continental atual durante a dispersão humana na América do Sul.

A morphological and molecular revision of lizards of the genus Marisora Hedges & Conn (Squamata: Mabuyidae) from Central America and Mexico, with descriptions of four new species

Zootaxa ◽  
2020 ◽  
Vol 4763 (3) ◽  
pp. 301-353
Author(s):  
JAMES R. MCCRANIE ◽  
AMY J. MATTHEWS ◽  
S. BLAIR HEDGES
Keyword(s):  
New Species ◽  
South America ◽  
Central America ◽  
Caribbean Sea ◽  
Molecular Data ◽  
Central American ◽  
The Caribbean ◽  
Northern South America ◽  
Genetic Distinctiveness ◽  
Morphological And Molecular Data

The skink genus Marisora ranges from Mexico to northern South America and occurs on some islands in the Caribbean Sea. We conducted a revision of the genus Marisora from Mexico and Central America, using new morphological and molecular data, and find support for the five previously described species (Marisora alliacea, M.aurulae, M. brachypoda, M. magnacornae, and M. roatanae) and describe four new species: Marisora lineola sp. nov., M. aquilonaria sp. nov., M. syntoma sp. nov., and M. urtica sp. nov. We show that two species previously known only from Central American islands, M. magnacornae and M. roatanae, also occur on the adjacent mainland and that two species recently placed in Alinea belong to this evolutionary clade: Marisora berengerae n. comb. and Marisora pergravis n. comb. Together with M. falconensis and M. unimarginata, these 13 species of Marisora arose mostly in the Pliocene and are largely allopatric but are sympatric and nearly sympatric at several locations in Central America where they maintain their morphological and genetic distinctiveness. 

scholarly journals Fall and Winter Movements of Newfoundland Graycheeked Thrushes (Catharus Minimus Minimus)

2018 ◽  
Vol 5 (1) ◽  
pp. 42-48 ◽  
Author(s):  
Darroch M. Whitaker ◽  
Ian G. Warkentin ◽  
Keith A. Hobson ◽  
Peter Thomas ◽  
Rinchen Boardman
Keyword(s):  
South America ◽  
Central America ◽  
Sierra Nevada ◽  
Winter Habitat ◽  
Winter Range ◽  
Contemporary Research ◽  
The Caribbean ◽  
Northern South America ◽  
Migratory Stopover

Abstract The Newfoundland subspecies of Gray-cheeked Thrush (Catharus minimus minimus) has declined since the 1980s and degradation of winter habitat has been suggested as a contributing stressor. However, the winter range of this subspecies is not well understood, so we fitted 29 males with archival GPS tags during summer 2016. Four tagged thrushes were recaptured in summer 2017 and, though all tags had missing locations and broken antennae, the data retrieved showed that one thrush wintered in the Sierra Nevada de Santa Marta (SNSM) in northern Colombia, one in the nearby Sierra de Perija in Venezuela, and a third may have settled in the same region. One tag provided locations until April 21 and that thrush was consistently detected within a ~1 ha area through the winter. Locations obtained during fall migration indicated that thrushes travelled to South America via Central America and possibly by directly crossing the Caribbean. Contemporary research indicates that the SNSM is an important migratory stopover for Northern Gray-cheeked Thrushes (C. m. aliciae) but a historical report coupled with our observations suggest winter use of the SNSM and adjacent areas in northern South America by C. m. minimus, though numbers may be lower than during the 1900s.

scholarly journals REVISIÓN TAXONÓMICA DEL CORAL PORITES COLONENSIS (SCLERACTINIA: PORITIDAE) EN EL CARIBE COLOMBIANO

2016 ◽  
Vol 37 (2) ◽  
Author(s):  
Dagoberto E. Venera Pontón ◽  
Javier Reyes ◽  
Guillermo Diaz Pulido
Keyword(s):  
Continental Shelf ◽  
Taxonomic Revision ◽  
Caribbean Sea ◽  
South American ◽  
Large Variability ◽  
Porites Astreoides ◽  
Taxonomic Review ◽  
Natural Park ◽  
The Caribbean ◽  
First Time

Porites colonensis is a coral from the Caribbean Sea; colonies are foliaceous, undulated, and plate-like. Polyps are dark brown or red with small bright white or green centers; pali are present in corallites and the septal plan is bisymmetrical, conformed by three fused ventral septa, a dorsal solitary septum, and two pairs of lateral septa at each side of the dorso-ventral axis. P. colonensis is similar and can be confused with the smooth varieties of Porites astreoides and Porites branneri. There are three specimens collected from Colombia and previously identified as P. colonensis: one from Golfo de Urabá (Darién ecoregion), other from Islas del Rosario (Coralline Archipelagos ecoregion), and another from an unspecified locality, in addition to one published observation from the Golfo de Urabá without collected specimens. A recent finding of other specimens in the Tayrona National Natural Park (TNNP, Tayrona ecoregion) and the absence of a rigorous taxonomic revision for all specimens collected from Colombia showed that it was necessary to review the presence and distribution of P. colonensis in the Colombian Caribbean. A taxonomic review was done for all specimens collected from Colombia and previously identified as P. colonensis. Then, the morphologic variability of specimens that were confirmed as P. colonensis was described. Only the specimens from TNNP agreed with the holotype description of P. colonensis, while others agreed with flat varieties of P. astreoides. Thus, the presence of P. colonensis is confirmed for the first time for Colombia, but its presence in other Colombian localities outside Tayrona ecoregion could not be demonstrated. This is the only confirmed record of this species for the South American continental shelf. Furthermore, the skeletal characteristics of Colombian P. colonensis corallites showed large variability, exceeding the ranges previously described for the species.

scholarly journals Reevaluating human colonization of the Caribbean using chronometric hygiene and Bayesian modeling

2019 ◽  
Vol 5 (12) ◽  
pp. eaar7806 ◽  
Author(s):  
Matthew F. Napolitano ◽  
Robert J. DiNapoli ◽  
Jessica H. Stone ◽  
Maureece J. Levin ◽  
Nicholas P. Jew ◽  
...  
Keyword(s):  
South America ◽  
Bayesian Modeling ◽  
Human Settlement ◽  
Stepping Stone ◽  
Critical Information ◽  
Initial Settlement ◽  
Human Colonization ◽  
The Caribbean ◽  
Stepping Stone Model

Human settlement of the Caribbean represents the only example in the Americas of peoples colonizing islands that were not visible from surrounding mainland areas or other islands. Unfortunately, many interpretive models have relied on radiocarbon determinations that do not meet standard criteria for reporting because they lack critical information or sufficient provenience, often leading to specious interpretations. We have collated 2484 radiocarbon determinations, assigned them to classes based on chronometric hygiene criteria, and constructed Bayesian colonization models of the acceptable determinations to examine patterns of initial settlement. Colonization estimates for 26 islands indicate that (i) the region was settled in two major population dispersals that likely originated from South America; (ii) colonists reached islands in the northern Antilles before the southern islands; and (iii) the results support the southward route hypothesis and refute the “stepping-stone model.”

Freshwater discharge into the Caribbean Sea from the rivers of Northwestern South America (Colombia): Magnitude, variability and recent changes

2014 ◽  
Vol 509 ◽  
pp. 266-281 ◽  
Author(s):  
Juan Camilo Restrepo ◽  
Juan Carlos Ortíz ◽  
Jorge Pierini ◽  
Kerstin Schrottke ◽  
Mauro Maza ◽  
...  
Keyword(s):  
South America ◽  
Caribbean Sea ◽  
Freshwater Discharge ◽  
The Caribbean

scholarly journals DOES Notarius bonillai (SILURIFORMES: ARIIDAE) OCCUR IN FRESH AND ESTUARINE WATERS IN ILHA DO MARANHÃO, BRAZIL?

2019 ◽  
Vol 29 (1) ◽  
Author(s):  
Thiago Campos de Santana ◽  
Jonatas da Silva Castro ◽  
José Milton Barbosa ◽  
Erivânia Gomes Teixeira
Keyword(s):  
South America ◽  
Morphological Analysis ◽  
Caribbean Sea ◽  
Morphological Characters ◽  
Regional Study ◽  
Additional Material ◽  
Fish Collection ◽  
The Caribbean ◽  
Nueva Granada ◽  
Made In

ABSTRACTThis paper deals with the occurrence of the species Notarius bonillai (Miles, 1945) in waters of Ilha do Maranhão (or Ilha de São Luís), Maranhão, Brazil. The investigation is necessary to clarify the distribution of this species before any regional study on it can be made. In seven previous studies, Notarius bonillai is mentioned as living in waters of this region: in São José Bay at east, São Marcos Bay at west, and Arraial bay at south. However, several studies in South America report the species as endemic of the  two rivers and their estuaries, which flow into the coast of the Caribbean Sea of Colombia. Analysis included preserved specimens identified as Notarius bonillai from a regional fish collection of Ilha do Maranhão. Additional material of Cathorops specimens were collected in the municipality of Raposa, located near estuary of rio Paciência in the east of Ilha do Maranhão. Analysis of the morphological characters of preserved specimens of the regional fish collection, indicate that the species identified as Notarius bonillai in the region was erroneously identified, instead being Cathorops arenatus (Valenciennes, 1840). Morphological analysis of the additional material collected from Cathorops specimens indicate three species of Cathorops occurring in Ilha do Maranhão: Cathorops agassizii (Eigenmann & Eigenmann, 1888), Cathorops arenatus (Valenciennes, 1840), and Cathorops spixii (Agassiz, 1829). Consequently, Notarius bonillai does not occur in Ilha do Maranhão. RESUMOEste trabalho trata da ocorrência da espécie Notarius bonillai (Miles, 1945) na Ilha do Maranhão (ou Ilha de São Luís), Maranhão, Brasil. A investigação é necessária para esclarecer a distribuição desta espécie antes que qualquer estudo regional sobre ela possa ser feito. Em sete estudos anteriores,Notarius bonillai é mencionado como vivendo nas águas desta região: na Baía de São José a leste, na Baía de São Marcos a oeste e na Baía de Arraial ao sul. No entanto, vários estudos na América do Sul relatam a espécie como endêmica de dois rios e seus estuários, que desembocam na costa do Mar do Caribe na Colômbia. Análises incluíram espécimes preservados como Notarius bonillai deuma coleção regional de peixes da Ilha do Maranhão. Material adicional de espécimes de Cathorops foram coletados no município de Raposa, localizado próximo ao estuário do rio Paciência, no leste da Ilha do Maranhão. A análise dos caracteres morfológicos dos espécimes preservados na coleção regional de peixes, indicam que a espécie identificada como Notarius bonillai na região foierroneamente identificada, sendo Cathorops arenatus (Valenciennes, 1840) sua correta identificação. Análises morfológicas do material adicional de espécimes de Cathorops coletados indicam três espécies de Cathorops com ocorrência na Ilha do Maranhão: Cathorops agassizii (Eigenmann & Eigenmann, 1888), Cathorops arenatus (Valenciennes, 1840) e Cathorops spixii (Agassiz, 1829).Consequentemente, Notarius bonillai não ocorre na Ilha do Maranhão.Palavras-chave: Estuários; Nueva Granada sea catfish; Bagre cabezón; Uriacica; Baía de São Marcos; Baía de São José. 

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