External morphology of Trachycephalus quadrangulum comb. n. from the Chocó region, western Ecuador. AQCAZ 39360, adult male, SVL = 74.1 mm, Caimito, Provincia de Esmeraldas, Ecuador BQCAZ 39361, adult male, SVL = 73.2 mm, same locality as A C–DQCAZ 51746, adult female, SVL = 80.3, Bosque Pacocha, Provincia Manabí, Ecuador EQCAZ 35406, adult male (SVL = 69.5), Bosque Protector Puyango, Provincia El Oro, Ecuador FQCAZ 28530, adult male (SVL = 64.5), Hacienda Santa Teresita, Provincia del Guayas, Ecuador; (G–H) Holotype of Hyla quadrangulum, adult female; scale, in cm, shown for reference. Photographs: A–F by S. R. Ron, G–H by Jeff Streicher.