Phylogeography of the widespread Caribbean spiny orb weaver Gasteracantha cancriformis

Lisa Chamberland, Fabian C. Salgado-Roa, Alma Basco, Amanda Crastz-Flores, Greta Binford & Ingi Agnarsson
Background. Modern molecular analyses are often inconsistent with pre-cladistic taxonomic hypotheses, frequently indicating higher richness than morphological taxonomy estimates. Among Caribbean spiders, widespread species are relatively few compared to the prevalence of single island endemics. The taxonomic hypothesis Gasteracantha cancriformis circumscribes a species with profuse variation in size, color, and body form. Distributed throughout the Neotropics, G. cancriformis is the only morphological species of Gasteracantha in the New World in this globally distributed genus. Methods....

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