Expelled rediae develop into free-swimming, larval cercariae, which infect larvae of nearby amphibians [1]. These cercariae seek out areas of the morphology of the amphibian larvae that will eventually form the hindlimbs. Some scientists describe the embedding of subcutaneous cercariae, and later metacercariae, into the host amphibian as “jamm[ing] a golf ball into the space where the limb goes” [2]. As the host matures and undergoes metamorphosis, the metacercariae cause the host to form an increase in the number of limbs present, called supernumerary limbs [3].
Expelled rediae develop into free-swimming, larval cercariae, which infect larvae of nearby amphibians [1]. These cercariae seek out areas of the morphology of the amphibian larvae that will eventually form the hindlimbs. Some scientists describe the embedding of subcutaneous cercariae, and later metacercariae, into the host amphibian as “jamm[ing] a golf ball into the space where the limb goes” [2]. As the host matures and undergoes metamorphosis, the metacercariae cause the host to form an increase in the number of limbs present, called supernumerary limbs [3].
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