molecular systematics of the neotropical scorpion genus tityus (buthidae): the historical biogeography and venom antigenic diversity of toxic venezuelan species.we provide a mitochondrial dna-based phylogenetic hypothesis for 21 tityus species collected in venezuela, trinidad, brazil and panama, including 12 taxa known to be toxic to humans. our phylogenetic reconstruction is based on 850 nucleotides of the combined cytochrome oxidase subunit i and 16s rrna genes for most species, and centered on venezuelan scorpions owing to the detailed taxonomic and biogeographic information available for tityus in this region. the principal phylogenetic result was t ...201019799925
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