Terrestrial life emerged from the ocean multiple distinct times
Multiple independent lines of genomic and fossil evidence confirm that various animal lineages, particularly within arthropods, transitioned from aquatic to terrestrial environments across several distinct evolutionary events.
The claim is specific, empirical, and falsifiable, easily passing Step 0. The retrieved literature (especially papers 0, 2, 7, and 8) explicitly discusses the multiple, independent terrestrialization events (terrestrialization of Arachnida, Myriapoda, and Hexapoda) in arthropods and other groups. No papers refute the claim.
Lisandra Benítez‐Álvarez, Vanina Tonzo, Leandro Aristide, Rosa Fernández. Parallel Genomic Remodelling Associated With Independent Terrestrialization Events in Arthropods. 2025. https://doi.org/10.1111/mec.70231
Arachnida, Myriapoda, and Hexapoda represent independent terrestrialization events in arthropods.
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Lisandra Benítez-Álvarez, Vanina Tonzo, Leandro Aristide, Rosa Fernández. Parallel genomic remodeling associated with independent terrestrialization events in arthropods. 2025. https://doi.org/10.64898/2025.12.29.696964
Comparative genomics confirms that arthropods colonized land through multiple distinct, independent events.
Jesus Lozano-Fernandez, Robert Carton, Alastair R Tanner, Mark N Puttick, Mark Blaxter, Jakob Vinther, Jørgen Olesen, Gonzalo Giribet, Gregory D Edgecombe, Davide Pisani. A molecular palaeobiological exploration of arthropod terrestrialization.. 2016. https://doi.org/10.1098/rstb.2015.0133
Palaeobiological evidence highlights three separate Palaeozoic terrestrialization events for Myriapoda, Hexapoda, and Arachnida.
Jon F Harrison. Handling and Use of Oxygen by Pancrustaceans: Conserved Patterns and the Evolution of Respiratory Structures.. 2015. https://doi.org/10.1093/icb/icv055
Invaginations to form lungs or tracheae occurred independently multiple times across the Arthropoda to achieve terrestriality.
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