Small-scale biogeographical patterns in some groundwater Crustacea, the syncarid, Parabathynellidae.

Torres Pérez-Hidalgo, Trinidad José (2006). Small-scale biogeographical patterns in some groundwater Crustacea, the syncarid, Parabathynellidae.. "Biodiversity and conservation", v. 15 (n. 11); pp. 3527-3541. ISSN 0960-3115.

Description

Title: Small-scale biogeographical patterns in some groundwater Crustacea, the syncarid, Parabathynellidae.
Author/s:
  • Torres Pérez-Hidalgo, Trinidad José
Item Type: Article
Título de Revista/Publicación: Biodiversity and conservation
Date: 2006
ISSN: 0960-3115
Volume: 15
Subjects:
Faculty: E.T.S.I. Minas (UPM)
Department: Ingeniería Geológica [hasta 2014]
Creative Commons Licenses: Recognition - No derivative works - Non commercial

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Abstract

An 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.

More information

Item ID: 3307
DC Identifier: http://oa.upm.es/3307/
OAI Identifier: oai:oa.upm.es:3307
Deposited by: Biblioteca ETSI Minas y Energía
Deposited on: 11 Jun 2010 10:58
Last Modified: 20 Apr 2016 12:50
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