The Surinam toad is a flat amphibian that hunts by ambush and swallows small prey whole. The San Diego Zoo’s species page describes it as an ambush hunter that senses movement with its star-tipped fingers before lunging forward and eating prey in one gulp, while a UCLA newsroom report on research published in the Journal of Comparative Physiology A describes the animal as a strange, flat frog with minuscule eyes that lives in murky Amazon basin waters.
According to UCLA’s summary of the study, researchers found that the fingertip lobes are specialized mechanoreceptive organs, analogous to the tentacle-like appendages on a star-nosed mole’s face. UCLA says those lobules occupied 8% of the total forelimb skin surface but contained 60% of the touch-sensitive nerves serving the arm.
The same UCLA report says the optic tectum region devoted to processing information from the fingertips was far out of proportion to their size. In the study summary, that enlarged brain map appears alongside the anatomical and nerve findings as part of the evidence that the fingertips are a specialized touch system.
Claim support
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body — The Surinam toad is a flat amphibian.
- S3: "Surinam toads ( Pipa pipa ) are strange, flat frogs with minuscule eyes that live in the murky waters of the Amazon basin and carry their eggs on their back."
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body — The Surinam toad hunts by ambush.
- S5: "The Surinam toad is an ambush hunter, lying patiently in wait for unsuspecting prey to pass by."
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body — The Surinam toad senses movement with its star-tipped fingers before lunging forward and eating prey in one gulp.
- S5: "When the Surinam toad senses movement with its star-tipped fingers, it lunges forward and eats its prey in one gulp."
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body — UCLA’s study summary says the animal lives in murky Amazon basin waters and has poor vision.
- S3: "Surinam toads ( Pipa pipa ) are strange, flat frogs with minuscule eyes that live in the murky waters of the Amazon basin and carry their eggs on their back."
- S3: "The water is murky, and the frog’s vision is poor, but UCLA biologists have discovered that strange lobes on its fingertips are as sensitive to touch as human fingertips and detect the presence of prey by the movement of water."
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body — UCLA says the fingertip lobes are specialized mechanoreceptive organs analogous to the appendages on a star-nosed mole’s face.
- S3: "The results establish the fingertip lobes of the Surinam toad as specialized mechanoreceptive organs analogous to the tentacle-like appendages on the star-nosed mole’s face."
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body — UCLA says the lobules occupied 8% of forelimb skin surface but contained 60% of the arm’s touch-sensitive nerves.
- S3: "Even though the lobules occupied only 8% of the total forelimb skin surface, they contained 60% of the touch-sensitive nerves serving the arm."
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body — UCLA says the optic tectum region devoted to fingertip processing was far out of proportion to the fingertips’ size.
- S3: "Even though the fingertips make up very little of the body’s total surface area, the optic tectum region devoted to processing information from the fingertips was far out of proportion to their size."
assignment_id: 54e633e8-5699-42b4-a205-6d95532fb6ef
brief_hash: cd335d53c628b0f677a6bbdd4639774bc8d472fa78d479a777474738a3c9d3ef
draft_hash: a430e5d9fd3583f992f70ab49c3b7376782ea8226b8c15083e1feb9948c5d459
status: drafted
changed_fields:
- body
correction_notes:
- Split mixed body claims so flat body, ambush hunting, and finger-led prey detection map cleanly to their supporting sources.
- Corrected the inline San Diego Zoo attribution so the finger-sensing sentence is tied to S5 only.
- Tightened the final sentence to keep the conclusion anchored to UCLA’s reported study findings rather than a broader unsupported interpretation.
- Included literal claim-to-source support for the revised body claims.
