English   español  
Please use this identifier to cite or link to this item: http://hdl.handle.net/10261/54996
logo share SHARE logo core CORE   Add this article to your Mendeley library MendeleyBASE

Visualizar otros formatos: MARC | Dublin Core | RDF | ORE | MODS | METS | DIDL
Exportar a otros formatos:


Small-scale Biogeographical Patterns in some Groundwater Crustacea, the Syncarid, Parabathynellidae.

AuthorsCamacho Pérez, Ana I. ; Torres, Trinidad José de; Ortiz Menéndez, José Eugenio; Valdecasas, Antonio G.
Groundwater fauna
Iberian Peninsula
Issue Date2006
CitationBiodiversity and Conservation (15):3527–3541 (2006)
AbstractAn analysis was made of the micro-distribution patterns of five phylogenetically closely related species belonging to the genus Iberobathynella, a group of subterranean aquatic crustaceans (Syncarida, Parabathynellidae). The two-step model of colonization and speciation seems to provide a valid explanation for the current distribution of a large number of stygobiontic taxa of marine origin (thalassoid). However, with respect to the Iberobathynella, only the colonization of the subterranean environment at the mesoscale level can be explained. The second phase of the model, marine regression, can only explain the colonization of the region by the ancestor; the subsequent evolution and speciation at a smaller scale remain to be explained. Local geological constraints – Upper Triassic gypsiferous mudstone deposits plus faults and thrusting linked to the Alpine Orogeny – are responsible for the appearance of local palaeogeographic phenomena. These may have been the vicariant processes responsible for the geographical and genetic isolation of the ancestral populations of this group, which eventually led to clade divergence. Together with smallscale passive dispersion (11 dispersal events) and local extinction, these processes could be responsible for the current distribution of the five sister taxa inhabiting the caves of the Sierra de la Collada, Spain. A plausible palaeogeographical scenario is offered to explain their present distribution, that clearly came about through chance events.
Description15 páginas, 6 figuras, 3 tables et al..
Publisher version (URL)http://dx.doi.org/10.1007/s10531-004-1872-8
Appears in Collections:(MNCN) Artículos
Files in This Item:
There are no files associated with this item.
Show full item record
Review this work

Related articles:

WARNING: Items in Digital.CSIC are protected by copyright, with all rights reserved, unless otherwise indicated.