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A genome-based phylogeny for Mollusca is concordant with fossils and morphology
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Extreme morphological disparity within Mollusca has long confounded efforts to reconstruct a stable backbone phylogeny for the phylum. Familiar molluscan groups—gastropods, bivalves, and cephalopods—each represent a diverse radiation with myriad morphological, ecological, and behavioral adaptations. The phylum further encompasses many more unfamiliar experiments in animal body-plan evolution. In this work, we reconstructed the phylogeny for living Mollusca on the basis of metazoan BUSCO (Benchmarking Universal Single-Copy Orthologs) genes extracted from 77 (13 new) genomes, including multiple members of all eight classes with two high-quality genome assemblies for monoplacophorans. Our analyses confirm a phylogeny proposed from morphology and show widespread genomic variation. The flexibility of the molluscan genome likely explains both historic challenges with their genomes and their evolutionary success.
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CHEN, Zeyuan, BAEZA, J. antonio, CHEN, Chong, GONZALEZ, María teresa, GONZÁLEZ, Vanessa liz, GREVE, Carola, KOCOT, Kevin m., MARTINEZ ARBIZU, Pedro, MOLES, Juan, SCHELL, Tilman, SCHWABE, Enrico, SUN, Jin, WONG, Nur leena w. s., YAP-CHIONGCO, Meghan, SIGWART, Julia d.. A genome-based phylogeny for Mollusca is concordant with fossils and morphology. _Science_. 2025. Vol. 387, núm. 6737, pàgs. 1001-1007. [consulta: 4 de gener de 2026]. ISSN: 0036-8075. [Disponible a: https://hdl.handle.net/2445/222744]