For citation:
Ivolga R. A., Kidov A. A. On the identification of two cryptic forms (Dryophytes japonicus and D. cf. japonicus) of Japanese tree frogs (Amphibia, Anura, Hylidae) by morphometric characters. Current Studies in Herpetology, 2026, vol. 26, iss. 1, pp. 3-8. DOI: 10.18500/1814-6090-2026-26-1-2-3-8, EDN: CUGVCJ
On the identification of two cryptic forms (Dryophytes japonicus and D. cf. japonicus) of Japanese tree frogs (Amphibia, Anura, Hylidae) by morphometric characters
The results of using logarithmically transformed body proportionality indices for non-invasive vital identification of two cryptic forms of Japanese tree frogs are presented. Adult animals of Dryophytes japonicus (12 females and 54 males) and D. cf. japonicus (6 females and 58 males)) from the Russian Far East were studied. Two logarithmically transformed indices of body proportionality, namely, log(Sp.c.r./Sp.n.) and log(Sp.c.r./D.p.), were significant for female identification of species with a level of reliable classification of 83.3%. Three logarithmically transformed body proportionality indices were significant for male identification of species, namely, log(D.r.o./D.p.), log(D.r.o./Sp.n.), and log(D.n.o./L.tym.), with a level of reliable classification of 87.5%. The results of using the revealed body proportionality indices have proven to be effective for non-invasive vital identification of D. japonicus and D. cf. japonicus individuals.
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