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Table 1 Plectrohyla species used for the different methods applied

From: Love bites: male frogs (Plectrohyla, Hylidae) use teeth scratching to deliver sodefrin precursor-like factors to females during amplexus

  P. sagorum P. matudai P. hartwegi
Behavioural observations (mating)   
Teeth length comparison between males and females
Distance between male teeth vs. Female scratches  
Microscopic structures of lip glands
Lip gland protein expression and phylogenetic analysis