INVESTIGADORES
BALDO Juan Diego
artículos
Título:
The Adhesive Glands during Embryogenesis in Some Species of Phyllomedusinae (Anura: Hylidae)
Autor/es:
VERA CANDIOTI MARÍA FLORENCIA; CARLOS TABOADA; MARÍA JOSÉ SALICA; DIEGO BALDO; JULIÁN FAIVOVICH; DÉLIO BAÊTA
Revista:
JOURNAL OF HERPETOLOGY
Editorial:
SOC STUDY AMPHIBIANS REPTILES
Referencias:
Lugar: Salt Lake City; Año: 2017 vol. 51 p. 119 - 129
ISSN:
0022-1511
Resumen:
ABSTRACT.⎯Among anuran embryonic structures, the adhesive (cement) glands appear posterolaterally to the stomodeum and produce a mucous secretion that adheres embryos to surfaces in and out of the egg. In this paper we study the ontogeny of the adhesive glands in five species of Phyllomedusa representing the two main clades recognized in the genus, plus embryos of Agalychnis aspera and Phasmahyla cochranae. Clutches were collected in the field, and embryos were periodically fixed to obtain complete developmental series and then studied with stereomicroscope, scanning electron microscopy, and routine histological techniques. Structural variations include glands absent (in P. cochranae and P. boliviana), functional club-shaped glands (morphogenetic Type C, in P. sauvagii, P. iheringii, and P. tetraploidea), and an unusual Type C-like pattern in P. azurea, characterized by large, oblong glands in a horseshoe-like disposition around the oral disc. This latter gland configuration is similar to that of A. aspera. Interspecific variations also include the arrangement and regression pattern of the secretory region, which are in turn different from those of Type C glands in other clades. We still need information on gland occurrence and development in the basal genera of Phyllomedusinae (Phrynomedusa and Cruziohyla), and in the basal taxa of the two major clades of Phyllomedusa, in order to interpret the origin and evolution of gland developmental patterns in the group.