Middle American Frogs of the Hyla microcephala Group

A systematic study of small yellow tree frogs in southern Mexico and Central America that synthesizes extensive field and museum material to delimit taxa and describe geographic variation. The authors present identification keys and detailed species accounts supported by external morphology, cranial osteology, and analyses of mating calls, together with measurements, range localities, and life-history observations. Methods include examination of preserved specimens, skeletal preparations, tadpoles and eggs, and acoustic recordings analyzed on sonagraph-type equipment. The work concludes with a discussion of reproductive acoustics, ecological data, and inferred phylogenetic relationships among the group’s species.