Historical biogeography in tropical Atlantic populations of Cladophoropsis membranacea and related species

The Tethys was an equatorial sea that came into existence some 200 million years ago and closed about 12 million years ago thereby fragmenting the pan-tropical marine flora. The tropical provinces of the eastern Pacific, the lndo-West Pacific, the eastern Atlantic, and the Caribbean are today's isolated remnants. Because the tropics have remained relatively stable with respect to temperature throughout long
periods of geologic time, it is the least complicated place in which to test a Tethyan vicariance hypothesis. Species and lineages occurring in today's provinces are hypothesized to have shared an evolutionary heritage of ancestor-descendant
relationships that can be recovered in a phylogeny and reflects their earlier coalescence. This thesis explores the link between historical biogeographic pattern and phylogeny in the tropical intertidal alga Cladophoropsis membranacea and related species in the Siphonocladales-Cladophorales complex. ...

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Summary and conclusions

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