The phylogeography ofLemniscomys striatus(Rodentia: Muridae) Confirms a Remarkable Vicariant Event in Neighbouring Savanna Populations in Central Gabon

2012 ◽  
Vol 47 (2) ◽  
pp. 285-293
Author(s):  
J-F. Mboumba ◽  
V. Nicolas ◽  
M. Colyn ◽  
P. Deleporte
Keyword(s):  
Vicariant Event

Molecular phylogenetics and evolution of the food relocation behaviour of the dung beetle tribe Eucraniini (Coleoptera:Scarabaeidae:Scarabaeinae)

2006 ◽  
Vol 20 (5) ◽  
pp. 557 ◽  
Author(s):  
Federico C. Ocampo ◽  
David C. Hawks
Keyword(s):  
Phylogenetic Analysis ◽  
South America ◽  
Molecular Phylogeny ◽  
Plant Material ◽  
Molecular Phylogenetics ◽  
Middle Miocene ◽  
Dung Beetle ◽  
Sister Group ◽  
Vicariant Event ◽  
Andean Uplift

A phylogenetic analysis using 28S and 18S rDNA provides evidence that the tribe Eucraniini is a monophyletic group and the sister-group of the Phanaeini and Dichotomiini. Our molecular phylogeny of the dung beetle tribes provides strong evidence for the monophyly of the subfamily Scarabaeinae. The monophyly of the tribe Eucraniini is well supported and it includes the genera Anomiopsoides Blackwelder, Ennearabdus van Lansberge, Eucranium Brullé and Glyphoderus Westwood. The food-lifting relocation behaviour present in species of Eucranium, Anomiopsoides and Glyphoderus is considered a derived condition and it most probably evolved from tunnelling behaviour. The preference for dry dung or dung pellets by species of Eucraniini genera, and feeding on plant material by species of Anomiopsoides, are considered apomorphic. Our analyses suggest that rolling behaviour in the Scarabaeinae evolved at least twice during their evolution. The incidence of high endemicity of dung beetles in the Monte biogeographic province of Argentina suggests that the area constitutes an independent centre of evolution. Our hypothesis is that a vicariant event was responsible for the divergence of the Eucraniini from a Neotropical lineage ancestral to Eucraniini and Phanaeini. The isolation of the Eucraniini lineage probably occurred after the Andean uplift during the Quechua diastrophism (middle Miocene) that resulted in the creation of xeric plains in austral regions of South America.

scholarly journals Distributions and phylogeographic data of rheophilic freshwater fishes provide evidences on the geographic extension of a central-brazilian amazonian palaeoplateau in the area of the present day Pantanal Wetland

2013 ◽  
Vol 11 (2) ◽  
pp. 319-326 ◽  
Author(s):  
Alexandre C. Ribeiro ◽  
Rodrigo M. Jacob ◽  
Ronnayana R. S. R. Silva ◽  
Flávio C. T. Lima ◽  
Daniela C. Ferreira ◽  
...  
Keyword(s):  
Molecular Analysis ◽  
Evolutionary History ◽  
Distribution Patterns ◽  
Sister Group ◽  
Freshwater Fishes ◽  
Drainage Basins ◽  
Vicariant Event ◽  
Shared History ◽  
History Of ◽  
Pantanal Wetland

The analysis of the distribution patterns presented by examples of freshwater fishes restricted to headwater habitat: the anostomid Leporinus octomaculatus, the characins Jubiaba acanthogaster, Oligosarcus perdido, Moenkhausia cosmops, Knodus chapadae, Planaltina sp., the loricariid Hypostomus cochliodon, and the auchenipterid Centromochlus sp. provided evidences of a relatively recent shared history between the highlands of the upper rio Paraguay and adjoining upland drainage basins. Restricted to headwater of the uplands in the upper rio Paraguay and adjoining basins, these species provide biological evidence of the former extension of the central Brazilian plateau before the origin of the Pantanal Wetland. Disjunction took place due to an ecological barrier to these rheophilic taxa represented tectonic subsidence related to the origin of the Pantanal Wetland. Molecular analysis of Jubiaba acanthogaster revealed that the sample from the upper rio Xingu basin are the sister-group of a clade that includes samples from the upper rio Arinos (upper rio Tapajós) plus the upper rio Paraguay basin, supporting the assumption that the origin of the upper rio Paraguay basin causing vicariance between this basin and the upper rio Tapajós is the least vicariant event in the evolutionary history of the group.

Huehuecanauhtlus tiquichensis, a new hadrosauroid dinosaur (Ornithischia: Ornithopoda) from the Santonian (Late Cretaceous) of Michoacán, Mexico

2012 ◽  
Vol 49 (2) ◽  
pp. 379-395 ◽  
Author(s):  
Angel Alejandro Ramírez-Velasco ◽  
Mouloud Benammi ◽  
Albert Prieto-Márquez ◽  
Jesús Alvarado Ortega ◽  
René Hernández-Rivera
Keyword(s):  
North America ◽  
Late Cretaceous ◽  
Common Ancestor ◽  
Cladistic Analysis ◽  
Lateral View ◽  
Occlusal Plane ◽  
Recent Common Ancestor ◽  
Vicariant Event ◽  
Most Recent Common Ancestor ◽  
Caudal Vertebrae

Huehuecanauhtlus tiquichensis gen. et sp. nov. is the southernmost diagnostic basal hadrosauroid in the Americas. The holotype and referred material of this taxon came from Santonian strata in the Michoacán State, southwestern Mexico. Huehuecanauhtlus tiquichensis is diagnosed on the basis of a combination of dental, axial, and appendicular characters, including the following: at least two teeth exposed on the occlusal plane of the dentary and maxilla; seven sacral vertebrae; tall neural spines of caudal vertebrae; supraacetabular process long; and short and trapezoidal (in lateral view) postacetabular process. It differs from other hadrosauroids in having an ilium with extreme ventral deflection of the preacetabular process. Maximum parsimony cladistic analysis placed H. tiquichensis as a closely related outgroup to Hadrosauridae. The occurrence of H. tiquichensis in the Santonian of North America may be explained as a dispersal event from Asia to North America that occurred no later than the Albian or, alternatively, as a vicariant event of a most recent common ancestor widespread in both landmasses.

scholarly journals Concordant patterns of mtDNA and nuclear phylogeographic structure reveal Pleistocene vicariant event in the green crab Carcinus aestuarii across the Siculo-Tunisian Strait

2016 ◽  
Vol 17 (2) ◽  
pp. 533 ◽  
Author(s):  
T. DELI ◽  
N. CHATTI ◽  
K. SAID ◽  
C. D SCHUBART
Keyword(s):  
Genetic Structure ◽  
Demographic History ◽  
Time Estimation ◽  
Mediterranean Coast ◽  
Green Crab ◽  
Early Pleistocene ◽  
Phylogeographic Structure ◽  
Secondary Contact ◽  
Mediterranean Populations ◽  
Vicariant Event

This study focuses on the population genetic structure of the green crab Carcinus aestuarii along part of the African Mediterranean coast, with the main target to confirm genetic subdivision across the well documented genetic boundary of the Siculo-Tunisian Strait. For this purpose, the mitochondrial COI (cytochrome oxidase I) gene and five polymorphic microsatellite loci were analysed in 144 and 120 specimens, respectively. Our results show the existence of two distinct haplogroups, separated by 16 mutational steps and revealed a non random distribution of the genetic variation along the African Mediterranean coast. Dating analyses, based on the use of different molecular clock models and rates, placed the divergence among both haplogroups at 1.91 Myr (95% HPD: 1.11–2.68 Myr) to 0.69 Myr (95% HPD: 0.44–0.98 Myr). This range of divergence time estimation corresponds to the Early Pleistocene. The particular pattern of genetic divergence among Eastern and Western African Mediterranean populations of C. aestuarii, detected by 2-level AMOVA at the mitochondrial level, was consistent with that inferred from microsatellite analysis and suggests a vicariant event in C. aestuarii. Demographic reconstruction, inferred from mismatch distribution and BSP analyses, yielded different patterns of demographic history between both African Mediterranean groups. The distribution pattern of the two haplogroups across the African Mediterranean coast, along with results of Bayesian analysis of genetic structure revealing an intermediate geographic group between the two divergent groups of the African coast, support the hypothesis of a secondary contact between two historically isolated groups. Although this hypothetical contact zone, thought to be located near the Siculo-Tunisian Strait, still needs to be verified, the asymmetric gene flow from Western to Eastern African Mediterranean, as inferred by the results of a MIGRATE analysis, reinforces the previously mentioned results.

Phylogeography and palaeomodelling of Duseniella patagonica (Barnadesioideae), an early-diverging member of Asteraceae endemic to the Argentinean Monte and Patagonia

2020 ◽  
Vol 130 (4) ◽  
pp. 726-750
Author(s):  
Estrella Urtubey ◽  
Tod Falor Stuessy ◽  
Jose Ignacio Justel ◽  
Marcela Viviana Nicola
Keyword(s):  
Middle Miocene ◽  
Divergence Times ◽  
Climatic Data ◽  
Nuclear Markers ◽  
Ancestral Area ◽  
Vicariant Event ◽  
Late Middle Miocene ◽  
Soil Elevation ◽  
Geomorphological Processes ◽  
Two Populations

Abstract We performed an integrated phylogeographical and palaeoclimatic study of an early-diverging member of Asteraceae, Duseniella patagonica, endemic to Argentina. Chloroplast and nuclear markers were sequenced from 106 individuals belonging to 20 populations throughout the species range. We analysed genetic spatial distribution, diversity and structure, tested for range expansion, estimated divergence times, reconstructed ancestral areas and modelled present and past species distributions based on climatic data. Duseniella diverged from its sister genera during the Late/Middle Miocene. Its ancestral area included southern Monte plus eastern and central Patagonia. A vicariant event separated Monte and Patagonian clades during the Plio-Pleistocene. This would have involved unfavourable climate, soil, elevation, volcanism and/or other geomorphological processes between 40 and 43.5°S, in the sourroundings of the Somuncura plateau. Each clade possesses its own haplotypes and nucleotypes. Two populations, one in southern Monte and the other in eastern Patagonia, contain the highest diversity and exclusive haplotypes, representing hypothetical ancestral refugia. Northern Monte and southern Patagonian populations show low to null genetic diversity, being the most recently colonized areas. Climatic models indicate that winter temperature influenced the distribution of Duseniella, with an increase in probability of occurrence during colder periods, thus enabling diversification during glacial episodes.

A new Lamellibrachia species and confirmed range extension for Lamellibrachia barhami (Siboglinidae, Annelida) from Costa Rica methane seeps

Zootaxa ◽  
2018 ◽  
Vol 4504 (1) ◽  
pp. 1 ◽  
Author(s):  
MARINA F. MCCOWIN ◽  
GREG W. ROUSE
Keyword(s):  
Costa Rica ◽  
Phylogenetic Analyses ◽  
Geographic Range ◽  
Eastern Pacific ◽  
Congeneric Species ◽  
Methane Seep ◽  
Geographic Proximity ◽  
Vicariant Event ◽  
The Pacific ◽  
Costa Rica Margin

Lamellibrachia Webb, 1969 has eight currently recognized species reported from chemosynthetic environments in the Pacific, Atlantic, and Mediterranean. Of these, Lamellibrachia barhami Webb, 1969 has been reported in the eastern Pacific from Canada to Costa Rica. In this study, phylogenetic analyses of Lamellibrachia tubeworms sampled from the Costa Rica margin confirm the large geographic range of L. barhami and reveal a new Lamellibrachia species from a single methane seep between 999 and 1,040 meters. Lamellibrachia donwalshi sp. nov. differs genetically and morphologically from all congeneric species. Despite its geographic proximity to the eastern Pacific L. barhami, L. donwalshi sp. nov. formed a clade with Atlantic and Mediterranean Lamellibrachia species. This suggests a vicariant event may have occurred after an Atlantic radiation of Lamellibrachia. 

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