ArticlePeerJ2026
Synthesis of molecular data on Mactroidea (Bivalvia): phylogenetic implications and open questions.
Article in PeerJ, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.
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5 authors.
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Abstract
Molecular phylogenetics have clarified high-level evolutionary relationships across the tree of life, but sampling is highly uneven at lower levels, particularly for marine organisms. Here, we synthesize all publicly available Sanger sequencing data for the diverse yet under-sampled marine bivalve superfamily Mactroidea to provide a unified molecular and paleontological framework, and to guide targeted sampling for a more complete understanding of the group's evolutionary history. We infer two complementary phylogenetic estimates, one using a comprehensive eight-gene alignment that maximizes taxon sampling, and a second high-coverage three-gene alignment that maximizes molecular coverage. Both phylogenies are largely concordant with morphology-based classifications at the genus and subgenus levels, but reveal that the recognized mactroid families with sequence data, as currently described, and the subfamilies of Mactridae are not reciprocally monophyletic. Among the genera, evidence suggests that
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