Osteological development and homology of the prenasal bones in Rhinella fernandezae (Gallardo, 1957) (Anura: Bufonidae)

ALCALDE L

ZOOLOGISCHER ANZEIGER

ELSEVIER GMBH

Año: 2017 vol. 268 p. 96 - 101

0044-5231

tBufonid toads of the Rhinella granulosa species group are reported to have paired prenasal bones typicallyabsent in other bufonids. The homology of the prenasal bone is explored throughout ontogeny herein bystudying larvae, froglets, and adult R. fernandezae. I found that these putative bones are actually part ofthe enlarged and exposed anterior ends of the septomaxillae. An unpaired prenasal bone not previouslydescribed for other toads was found at the anterior end of the snout of R. fernandezae. Its position, origin,and shape indicate this bone is a homologue with the prenasal described for some casque-headed hylids.