A genome-based phylogeny for Mollusca is concordant with fossils and morphology
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....
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| Main Authors: | , , , , , , , , , , , , , , |
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| Format: | Article |
| Language: | en |
| Published: |
American Association for the Advancement of Science
2025
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| Subjects: | |
| Online Access: | http://psasir.upm.edu.my/id/eprint/123270/1/123270.pdf http://psasir.upm.edu.my/id/eprint/123270/ https://www.science.org/doi/10.1126/science.ads0215 |
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| Summary: | 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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