Fig. 5
From: Paedomorphosis in the Ezo salamander (Hynobius retardatus) rediscovered after almost 90 years
Spermatozoa of paedomorph-like and metamorphosed males of Hynobius retardatus. a, b Paedomorph-like males (PM-2 and PM-3, respectively). c, d Metamorphosed males (TM-1 and TM-2, respectively). Scale bars: 100 μm