Document Detail


Forest refugia in Western and Central Africa as 'museums' of Mesozoic biodiversity.
MedLine Citation:
PMID:  23193047     Owner:  NLM     Status:  MEDLINE    
Abstract/OtherAbstract:
The refugial speciation model, or 'species pump', is widely accepted in the context of tropical biogeography and has been advocated as an explanation for present species distributions in tropical Western and Central Africa. In order to test this hypothesis, a phylogeny of the cryptic arachnid order Ricinulei, based on four nuclear and mitochondrial DNA markers, was inferred. This ancient clade of litter-dwelling arthropods, endemic to the primary forests of Western and Central Africa and the Neotropics, might provide insights into the mode and tempo of evolution in Africa. Twenty-six African ricinuleid specimens were sampled from eight countries spanning the distribution of Ricinulei on the continent, and analysed together with Neotropical samples plus other arachnid outgroups. The phylogenetic and molecular dating results suggest that Ricinulei diversified in association with the fragmentation of Gondwana. The early diversification of Ricinoides in Western and Central Africa around 88 (±33) Ma fits old palaeogeographical events better than recent climatic fluctuations. Unlike most recent molecular studies, these results agree with fossil evidence, suggesting that refugia may have acted as 'museums' conserving ancient diversity rather than as engines generating diversity during successive episodes of climatic fluctuation in Africa.
Authors:
Jérôme Murienne; Ligia R Benavides; Lorenzo Prendini; Gustavo Hormiga; Gonzalo Giribet
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Publication Detail:
Type:  Journal Article; Research Support, Non-U.S. Gov't; Research Support, U.S. Gov't, Non-P.H.S.    
Journal Detail:
Title:  Biology letters     Volume:  9     ISSN:  1744-957X     ISO Abbreviation:  Biol. Lett.     Publication Date:  2013 Feb 
Date Detail:
Created Date:  2012-11-29     Completed Date:  2013-05-09     Revised Date:  2014-02-25    
Medline Journal Info:
Nlm Unique ID:  101247722     Medline TA:  Biol Lett     Country:  England    
Other Details:
Languages:  eng     Pagination:  20120932     Citation Subset:  IM    
Data Bank Information
Bank Name/Acc. No.:
GENBANK/JX951305;  JX951306;  JX951307;  JX951308;  JX951309;  JX951310;  JX951311;  JX951312;  JX951313;  JX951314;  JX951315;  JX951316;  JX951317;  JX951318;  JX951319;  JX951320;  JX951321;  JX951322;  JX951323;  JX951324;  JX951325;  JX951326;  JX951327;  JX951328;  JX951329;  JX951330;  JX951331;  JX951332;  JX951333;  JX951334;  JX951335;  JX951336;  JX951337;  JX951338;  JX951339;  JX951340;  JX951341;  JX951342;  JX951343;  JX951344;  JX951345;  JX951346;  JX951347;  JX951348;  JX951349;  JX951350;  JX951351;  JX951352;  JX951353;  JX951354;  JX951355;  JX951356;  JX951357;  JX951358;  JX951359;  JX951360;  JX951361;  JX951362;  JX951363;  JX951364;  JX951365;  JX951366;  JX951367;  JX951368;  JX951369;  JX951370;  JX951371;  JX951372;  JX951373;  JX951374;  JX951375;  JX951376;  JX951377;  JX951378;  JX951379;  JX951380;  JX951381;  JX951382;  JX951383;  JX951384;  JX951385;  JX951386;  JX951387;  JX951388;  JX951389;  JX951390;  JX951391;  JX951392;  JX951393;  JX951394;  JX951395;  JX951396;  JX951397;  JX951398;  JX951399;  JX951400;  JX951401;  JX951402;  JX951403;  JX951404;  JX951405;  JX951406;  JX951407;  JX951408;  JX951409;  JX951410;  JX951411;  JX951412;  JX951413;  JX951414;  JX951415;  JX951416;  JX951417;  JX951418;  JX951419
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MeSH Terms
Descriptor/Qualifier:
Africa, Central
Africa, Western
Animals
Arachnida / genetics*
Biodiversity
Biological Evolution*
Ecosystem*
Molecular Sequence Data
Phylogeny
Sequence Analysis, DNA
Sequence Homology
Comments/Corrections

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