Abstract:The rocky intertidal gastropods Agathistoma viridulum and A. hotessierianum occur from the Caribbean to southern Brazil, with a gap in the equatorial region, giving them an anti-tropical distribution. We used sequences from mitochondrial genes to elucidate the phylogeography of A. viridulum and A. hotessierianum and to infer their relationships to other species of Agathistoma. For A. hotessierianum, haplotype networks and phylogenetic analyses split samples into two distinct groups: one (A. hotessierianum) in … Show more
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