The epidermal cocoon of Pternohyla consists of multiple sheddings of the stratum corneum interspersed with mucus filled subcorneal spaces. The rate of water loss through the cocoon is very low (0.6 mg g-1 hr-1) under the experimental conditions of flowing dry air. The cocoon of Pternohyla represents the first known case of cocoon formation in a hylid frog.
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Ruibal et al. (1981) studied this question.
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