scholarly journals Spintharus flavidus in the Caribbean – a 30 million year biogeographical history and radiation of a ‘widespread species’

2015 ◽  
Author(s):  
Austin Dziki ◽  
Greta Binford ◽  
Jonathan A Coddington ◽  
Ingi Agnarsson
Keyword(s):  
Single Species ◽  
Caribbean Region ◽  
Dispersal Ability ◽  
Widespread Species ◽  
Caribbean Islands ◽  
Island Endemics ◽  
Molecular Phylogenetic ◽  
Limited Dispersal ◽  
History Of ◽  
The Caribbean

The Caribbean island biota is characterized by high levels of endemism, the result of an interplay between colonization opportunities on islands and effective oceanic barriers among them. A relatively small percentage of the biota is represented by ‘widespread species’, presumably taxa for which oceanic barriers are ineffective. Few studies have explored in detail the genetic structure of widespread Caribbean taxa. The cobweb spider Spintharus flavidus Hentz, 1850 (Theridiidae) is one of two described Spintharus species and is unique in being widely distributed from northern N. America to Brazil and throughout the Caribbean. As a taxonomic hypothesis, Spintharus “flavidus” predicts maintenance of gene flow among Caribbean islands, a prediction that seems contradicted by known S. flavidus biology, which suggests limited dispersal ability. As part of an extensive survey of Caribbean arachnids (project CarBio), we conducted the first molecular phylogenetic analysis of S. flavidus with the primary goal of testing the ‘widespread species’ hypothesis. Our results, while limited to three molecular loci, reject the hypothesis of a single widespread species. Instead this lineage seems to represent a radiation with at least 16 species in the Caribbean region. Nearly all are short range endemics with several distinct mainland groups and others being single island endemics. While limited taxon sampling, with a single specimen from S. America, constrains what we can infer about the biogeographical history of the lineage, clear patterns still emerge. Consistent with limited overwater dispersal, we find evidence for a single colonization of the Caribbean about 30 million years ago, coinciding with the timing of the GAARLandia landbridge hypothesis. In sum, S. “flavidus” is not a single species capable of frequent overwater dispersal, but rather a 30 my old radiation of single island endemics that provides preliminary support for a complex and contested geological hypothesis.

scholarly journals Spintharus flavidus in the Caribbean – a 30 million year biogeographical history and radiation of a ‘widespread species’

2015 ◽  
Author(s):  
Austin Dziki ◽  
Greta Binford ◽  
Jonathan A Coddington ◽  
Ingi Agnarsson
Keyword(s):  
Single Species ◽  
Caribbean Region ◽  
Dispersal Ability ◽  
Widespread Species ◽  
Caribbean Islands ◽  
Island Endemics ◽  
Molecular Phylogenetic ◽  
Limited Dispersal ◽  
History Of ◽  
The Caribbean

The Caribbean island biota is characterized by high levels of endemism, the result of an interplay between colonization opportunities on islands and effective oceanic barriers among them. A relatively small percentage of the biota is represented by ‘widespread species’, presumably taxa for which oceanic barriers are ineffective. Few studies have explored in detail the genetic structure of widespread Caribbean taxa. The cobweb spider Spintharus flavidus Hentz, 1850 (Theridiidae) is one of two described Spintharus species and is unique in being widely distributed from northern N. America to Brazil and throughout the Caribbean. As a taxonomic hypothesis, Spintharus “flavidus” predicts maintenance of gene flow among Caribbean islands, a prediction that seems contradicted by known S. flavidus biology, which suggests limited dispersal ability. As part of an extensive survey of Caribbean arachnids (project CarBio), we conducted the first molecular phylogenetic analysis of S. flavidus with the primary goal of testing the ‘widespread species’ hypothesis. Our results, while limited to three molecular loci, reject the hypothesis of a single widespread species. Instead this lineage seems to represent a radiation with at least 16 species in the Caribbean region. Nearly all are short range endemics with several distinct mainland groups and others being single island endemics. While limited taxon sampling, with a single specimen from S. America, constrains what we can infer about the biogeographical history of the lineage, clear patterns still emerge. Consistent with limited overwater dispersal, we find evidence for a single colonization of the Caribbean about 30 million years ago, coinciding with the timing of the GAARLandia landbridge hypothesis. In sum, S. “flavidus” is not a single species capable of frequent overwater dispersal, but rather a 30 my old radiation of single island endemics that provides preliminary support for a complex and contested geological hypothesis.

scholarly journals Spintharus flavidusin the Caribbean—a 30 million year biogeographical history and radiation of a ‘widespread species’

PeerJ ◽  
2015 ◽  
Vol 3 ◽  
pp. e1422 ◽  
Author(s):  
Austin Dziki ◽  
Greta J. Binford ◽  
Jonathan A. Coddington ◽  
Ingi Agnarsson
Keyword(s):  
Single Species ◽  
Caribbean Region ◽  
Dispersal Ability ◽  
Widespread Species ◽  
Caribbean Islands ◽  
Island Endemics ◽  
Molecular Phylogenetic ◽  
Limited Dispersal ◽  
History Of ◽  
The Caribbean

The Caribbean island biota is characterized by high levels of endemism, the result of an interplay between colonization opportunities on islands and effective oceanic barriers among them. A relatively small percentage of the biota is represented by ‘widespread species,’ presumably taxa for which oceanic barriers are ineffective. Few studies have explored in detail the genetic structure of widespread Caribbean taxa. The cobweb spiderSpintharus flavidusHentz, 1850 (Theridiidae) is one of two describedSpintharusspecies and is unique in being widely distributed from northern N. America to Brazil and throughout the Caribbean. As a taxonomic hypothesis,Spintharus “flavidus”predicts maintenance of gene flow among Caribbean islands, a prediction that seems contradicted by knownS. flavidusbiology, which suggests limited dispersal ability. As part of an extensive survey of Caribbean arachnids (project CarBio), we conducted the first molecular phylogenetic analysis ofS. flaviduswith the primary goal of testing the ‘widespread species’ hypothesis. Our results, while limited to three molecular loci, reject the hypothesis of a single widespread species. Instead this lineage seems to represent a radiation with at least 16 species in the Caribbean region. Nearly all are short range endemics with several distinct mainland groups and others are single island endemics. While limited taxon sampling, with a single specimen from S. America, constrains what we can infer about the biogeographical history of the lineage, clear patterns still emerge. Consistent with limited overwater dispersal, we find evidence for a single colonization of the Caribbean about 30 million years ago, coinciding with the timing of the GAARLandia landbridge hypothesis. In sum,S. “flavidus”is not a single species capable of frequent overwater dispersal, but rather a 30 my old radiation of single island endemics that provides preliminary support for a complex and contested geological hypothesis.

scholarly journals Shell development, growth and sexual dimorphism in the Recent thecideide brachiopod Thecidellina meyeri sp. nov. from the Lesser Antilles, Caribbean

2009 ◽  
Vol 89 (3) ◽  
pp. 469-479 ◽  
Author(s):  
Jana Hoffmann ◽  
Carsten Lüter
Keyword(s):  
Morphological Characters ◽  
Lesser Antilles ◽  
Caribbean Region ◽  
Dispersal Ability ◽  
High Species Diversity ◽  
Limited Dispersal ◽  
Complete Series ◽  
The Caribbean ◽  
Insight Into ◽  
Material Study

A new thecideide brachiopod species, Thecidellina meyeri, is described from the southern Lesser Antilles (Aruba, Bonaire, Curaçao), Caribbean Sea, with unique morphological characters which clearly separate it from all other described species of Thecidellina in the region. A virtually complete series of ontogenetic stages is recorded, providing insight into the plasticity of shell development during growth in thecideide brachiopods and offering a well-defined standard for comparison with fossil material. Study of the soft tissue suggests that T. meyeri is dioecious, which contradicts the idea of Thecidellina to be hermaphroditic. The limited distribution and the unexpectedly high species diversity within the genus Thecidellina in the Caribbean region support the idea of allopatric speciation due to limited dispersal ability.

“Cuba Libre”

2016 ◽  
Author(s):  
Njoroge Njoroge
Keyword(s):  
Industrial Production ◽  
Cultural Identification ◽  
Caribbean Region ◽  
Labor Discipline ◽  
Political Evolution ◽  
History Of ◽  
The Caribbean ◽  
Cross Fertilization

This chapter explores musical and political evolution of Cuba in the early 20th century. Cuba provides an interesting condensation of the history of the Caribbean region where sugar and slavery were the dominating and defining features of society. Musical developments in Cuba demonstrate this history on a cultural plane, and by examining the music of the Rumba and the Son in the pre-revolutionary Cuban context and their confluence and cross-fertilization in the 20th century, we can glimpse dynamics of national and regional consciousness, ethnic and cultural identification, class formations and power, slave culture, experience and expression, the transitions of emancipation and urbanization, and the different rhythms of industrial production and modern labor-discipline. The Cuban counterpoint of the Rumba/Son complex reveals the complex interrelations between modes of production and musical formations and the polyrhythmic tensions of race, class, and nation.

Introduction

2020 ◽  
pp. 1-30
Author(s):  
William Ghosh
Keyword(s):  
Twentieth Century ◽  
Intellectual History ◽  
Caribbean Region ◽  
The Political ◽  
The World ◽  
Colonial Experience ◽  
History Of ◽  
The Caribbean ◽  
Formed Part ◽  
Historical Past

V.S. Naipaul is one of the most internationally acclaimed twentieth-century writers from the Caribbean region. Yet it is usually assumed that he was neither much influenced by the Caribbean literary and intellectual tradition, nor very influential upon it. This chapter argues that these assumptions are wrong. It situates Naipaul’s life and work within the political, social, and intellectual history of the twentieth-century Caribbean. Naipaul’s work formed part of a larger historical debate about the sociology of slavery in the Caribbean, the specificity of Caribbean colonial experience, and the influence of that historical past on Caribbean life, culture, and politics after independence. The chapter closes with a reading of Naipaul’s late, retrospective book about Trinidad, A Way in the World.

PCR-Ribotyping of Xenorhabdus andPhotorhabdus Isolates from the Caribbean Region in Relation to the Taxonomy and Geographic Distribution of Their Nematode Hosts

1998 ◽  
Vol 64 (11) ◽  
pp. 4246-4254 ◽  
Author(s):  
Marion Fischer-Le Saux ◽  
Hervé Mauléon ◽  
Philippe Constant ◽  
Brigitte Brunel ◽  
Noël Boemare
Keyword(s):  
Entomopathogenic Nematodes ◽  
16S Rrna Genes ◽  
Rrna Genes ◽  
Caribbean Region ◽  
Polymorphism Analysis ◽  
Caribbean Islands ◽  
Pcr Ribotyping ◽  
The Caribbean ◽  
And Cluster Analysis ◽  
Reference Strains

ABSTRACT The genetic diversity of symbiotic Xenorhabdus andPhotorhabdus bacteria associated with entomopathogenic nematodes was examined by a restriction fragment length polymorphism analysis of PCR-amplified 16S rRNA genes (rDNAs). A total of 117 strains were studied, most of which were isolated from the Caribbean basin after an exhaustive soil sampling. The collection consisted of 77 isolates recovered from entomopathogenic nematodes in 14 Caribbean islands and of 40 reference strains belonging toXenorhabdus and Photorhabdus spp. collected at various localities worldwide. Thirty distinctive 16S rDNA genotypes were identified, and cluster analysis was used to distinguish the genus Xenorhabdus from the genusPhotorhabdus. The genus Xenorhabdusappears more diverse than the genusPhotorhabdus, and for both genera the bacterial genotype diversity is in congruence with the host-nematode taxonomy. The occurrence of symbiotic bacterial genotypes was related to the ecological distribution of host nematodes.

The kinematic evolution of the Demerara plateau and Guyana-Suriname margins

2020 ◽  
Author(s):  
Júlia Gómez-Romeu ◽  
Emmanuel Masini ◽  
Nick Kusznir ◽  
Sylvain Calassou
Keyword(s):  
Magnetic Data ◽  
Moho Depth ◽  
Caribbean Region ◽  
Equatorial Atlantic ◽  
Kinematic Evolution ◽  
History Of ◽  
The Caribbean ◽  
Surrounding Areas ◽  
Complex Architecture ◽  
Central Atlantic

<p>The Caribbean region has undergone a complex plate kinematics evolution due to the interaction between Central Atlantic pre-subduction paleogeography and Caribbean subduction dynamics. To better understand the initiation and dynamics of the Caribbean subduction it is important to determine the pre-subduction template. However, this template cannot be easily recognized as it either suffered from pervasive tectonic overprinting or has been consumed by subduction. To address this problem, it may be valuable to first unravel the structure and deformation history of the surrounding areas of the Caribbean region.</p><p>Here we investigate the kinematic evolution of the Triassic-Jurassic Demerara plateau and Guyana-Suriname (i.e Dp and G-S) margins which are present-day located to the south of the Caribbean subduction. To achieve our aim, we use seismic, gravity and magnetic data and apply a gravity anomaly inversion technique to determine Moho depth, crustal basement thickness and crustal thinning factor.</p><p>The Dp and G-S margins avoided subduction and consequently preserve the divergent history of Early Jurassic to Early Cretaceous rifting related to the opening of the Central Atlantic and Equatorial Atlantic respectively. This is inferred by a complex architecture of the Dp and G-S margins characterized by a set of transfer zones that crosscut each other.</p><p>By unravelling the kinematic evolution of the Dp and G-S margins we attempt to determine the pre-subduction template of the surrounding area of the Caribbean region.</p>

scholarly journals Detection of Cell-Fusing Agent virus across ecologically diverse populations of Aedes aegypti on the Caribbean island of Saint Lucia

2020 ◽  
Vol 5 ◽  
pp. 149
Author(s):  
Claire L. Jeffries ◽  
Mia White ◽  
Louisia Wilson ◽  
Laith Yakob ◽  
Thomas Walker
Keyword(s):  
Yellow Fever Virus ◽  
Mosquito Species ◽  
Environmental Parameters ◽  
Vector Surveillance ◽  
Urban Settings ◽  
Caribbean Islands ◽  
History Of ◽  
Risk Areas ◽  
The Caribbean ◽  
Saint Lucia

Background. Outbreaks of mosquito-borne arboviral diseases including dengue virus (DENV), Zika virus (ZIKV), yellow fever virus (YFV) and chikungunya virus (CHIKV) have recently occurred in the Caribbean. The geographical range of the principal vectors responsible for transmission, Aedes (Ae.) aegypti and Ae. albopictus are increasing and greater mosquito surveillance is needed in the Caribbean given international tourism is so prominent. The island of Saint Lucia has seen outbreaks of DENV and CHIKV in the past five years but vector surveillance has been limited with the last studies dating back to the late 1970s. Natural disasters have changed the landscape of Saint Lucia and the island has gone through significant urbanisation. Methods. In this study, we conducted an entomological survey of Ae. aegypti and Ae. albopictus distribution across the island and analysed environmental parameters associated with the presence of these species in addition to screening for medically important arboviruses and other flaviviruses. Results. Although we collected Ae. aegypti across a range of sites across the island, no Ae. albopictus were collected despite traps being placed in diverse ecological settings. The number of Ae. aegypti collected was significantly associated with higher elevation, and semi-urban settings yielded female mosquito counts per trap-day that were five-fold lower than urban settings. Screening for arboviruses revealed a high prevalence of cell-fusing agent virus (CFAV). Conclusions. Outbreaks of arboviruses transmitted by Ae. aegypti and Ae. albopictus have a history of occurring in small tropical islands and Saint Lucia is particularly vulnerable given the limited resources available to undertake vector control and manage outbreaks. Surveillance strategies can identify risk areas for predicting future outbreaks. Further research is needed to determine the diversity of current mosquito species, investigate insect-specific viruses, as well as pathogenic arboviruses, and this should also be extended to the neighbouring smaller Caribbean islands.

Life stage descriptions, taxonomic notes, and new records for the mayfly family Leptohyphidae (Ephemeroptera)

Zootaxa ◽  
2003 ◽  
Vol 332 (1) ◽  
pp. 1 ◽  
Author(s):  
DAVID E. BAUMGARDNER ◽  
STEVEN K. BURIAN ◽  
DAVID BASS
Keyword(s):  
United States ◽  
Central America ◽  
New Records ◽  
Life Stage ◽  
Caribbean Region ◽  
Larval Stages ◽  
Caribbean Islands ◽  
Ecological Region ◽  
The Caribbean ◽  
First Time

The larval stages of Tricorythodes fictus Traver, T. cobbi Alba-Tercedor and Flannagan, and T. mosegus Alba-Tercedor and Flannagan are described for the first time based upon reared specimens. The rarely reported Asioplax dolani (Allen) is newly documented from the Austroriparian ecological region of Texas. Leptohyphes zalope Traver, known from the southwestern United States and much of Central America, is newly documented from the Caribbean Islands of Grenada and Tobago. This represents only the second leptohyphid mayfly known from both Continental America and the Caribbean region. Additional Caribbean records of Allenhyphes flinti (Allen) are also given.

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