Snakes and other limbless reptiles are classified as tetrapods because they are descended from four-limbed ancestors.

the verdict

SUPPORTED

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Recorded sources

6 sources for · 0 against

Counts group repeated records of the same source within each side. They do not measure evidence strength or source independence.

Is it true that snakes and other limbless reptiles are classified as tetrapods because they are descended from four-limbed ancestors?

Yes. Snakes and other limbless reptiles are classified as tetrapods in modern cladistics because they evolved from four-limbed ancestors.

Verdict: SUPPORTED · 6 sources for, 0 against · Last checked 4 Oct 2026

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Evidence for · 6

Wikipedia: Snake

Reference article covering this claim directly

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Wikipedia: Snake. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Snake

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More for · 5

PLOS (all journals): Distinct Patterns of Desynchronized Limb Regression in Malagasy Scincine Lizards (Squamata, Scincidae)

Discusses how certain lineages evolved toward snake-like forms from fully quadrupedal ancestors.

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PLOS (all journals): Distinct Patterns of Desynchronized Limb Regression in Malagasy Scincine Lizards (Squamata, Scincidae). (n.d.). PLOS (all journals). https://doi.org/10.1371/journal.pone.0126074

LibreTexts: LibreTexts: 29.09: Chapter Summary

Explicitly notes limbless reptiles like snakes are classified as tetrapods because they descended from four-limbed ancestors.

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LibreTexts: LibreTexts: 29.09%3A Chapter Summary. (n.d.). LibreTexts. https://bio.libretexts.org/Courses/Norco_College/OpenStax_Biology_2e_for_Norco_College/29%3A_Vertebrates/29.09%3A_Chapter_Summary

OpenStax: OpenStax Biology: 29.4 Reptiles

Explains that limbless reptiles are classified as tetrapods because they are descended from four-limbed ancestors.

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OpenStax: OpenStax Biology: 29.4 Reptiles. (n.d.). OpenStax. https://openstax.org/books/biology/pages/7c002ad9-7046-4631-ae85-192159967cab@

Semantic Scholar peS2o: Estimating rates and patterns of morphological evolution from phylogenies: lessons in limb lability from Australian Lerista lizards

Notes the transition from a four-limbed body plan to a limbless snake-like one within squamates.

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Semantic Scholar peS2o: Estimating rates and patterns of morphological evolution from phylogenies: lessons in limb lability from Australian Lerista lizards. (n.d.). Semantic Scholar peS2o. https://jbiol.biomedcentral.com/track/pdf/10.1186/jbiol112

Wikipedia: Wikipedia: Tetrapod

Notes that limbless animals like snakes still qualify as tetrapods through their ancestry.

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Wikipedia: Wikipedia: Tetrapod. (n.d.). Wikipedia. https://en.wikipedia.org/wiki/Tetrapod

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