Possibly a calque of Spanish rana danta, named after the enlarged nose of this frog, resembling a tapir's.

tapir frog (plural tapir frogs)

1. A species of microhylid frog, Synapturanus danta, having a brown colour, sometimes with yellow or orange spots

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  tapir frog on Wikipedia.Wikipedia
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  Synapturanus danta on Wikispecies.Wikispecies
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  Category:Synapturanus danta on Wikimedia Commons.Wikimedia Commons