Journal Article
Phylogenetic evidence that both ancient vicariance and dispersal have contributed to the biogeographic patterns of anchialine cave shrimps
Jurado-Rivera, J.A., Pons, J., Alvarez, F., Botello, A., Humphreys, W.F., Page. T.J., Iliffe, T.M., Willassen, E., Meland, K., Juan, C. and Jaume, D.
Record Number:
4804
Year:
2017
Journal:
Scientific Reports
Pages:
1-11
Volume:
7: 2852
Abstract:
Cave shrimps from the genera Typhlatya, Stygiocaris and Typhlopatsa (Atyidae) are restricted to
specialised coastal subterranean habitats or nearby freshwaters and have a highly disconnected
distribution (Eastern Pacific, Caribbean, Atlantic, Mediterranean, Madagascar, Australia). The
combination of a wide distribution and a limited dispersal potential suggests a large-scale process
has generated this geographic pattern. tectonic plates that fragment ancestral ranges (vicariance)
has often been assumed to cause this process, with the biota as passive passengers on continental
blocks. the ancestors of these cave shrimps are believed to have inhabited the ancient tethys sea, with
three particular geological events hypothesised to have led to their isolation and divergence; (1) the
opening of the Atlantic Ocean, (2) the breakup of Gondwana, and (3) the closure of the Tethys Seaway.
We test the relative contribution of vicariance and dispersal in the evolutionary history of this group
using mitochondrial genomes to reconstruct phylogenetic and biogeographic scenarios with fossilbased
calibrations. Given that the Australia/Madagascar shrimp divergence postdates the Gondwanan
breakup, our results suggest both vicariance (the Atlantic opening) and dispersal. the tethys closure
appears not to have been influential, however we hypothesise that changing marine currents had an
important early influence on their biogeography.
Times Cited:
2