MUSEO ARGENTINO DE CIENCIAS NATURALES "BERNARDINO RIVADAVIA"
Unidad Ejecutora - UE
Comparative morphology of pond, stream and phytotelm-dwelling tadpoles of the South American Redbelly Toads (Anura: Bufonidae: Melanophryniscus)
BALDO, D; MARIA FLORENCIA VERA CANDIOTI; HAAD, B; KOLENC, F; BORTEIRO, C; PEREYRA, M; ZANK, C; COLOMBO, P; BORNSCHEIN, M; NETTO, F.; BRUSQUETTI, F.; CONTE, CE; NOGUEIRA COSTA, P; ALMEIDA SANTOS, P; PIE, M
BIOLOGICAL JOURNAL OF THE LINNEAN SOCIETY
WILEY-BLACKWELL PUBLISHING, INC
Lugar: Londres; Año: 2014 vol. 112 p. 417 - 417
We present a comprehensive review of larval morphology in the Neotropical toad genus Melanophryniscus. Studied taxa included 23 species with representatives of recognized phenetic groups and different larval ecomorphological guilds: pond, stream and phytotelm-dwelling tadpoles. External morphology variation is congruent with current phenetic arrangement based on adult features, but also reflects habitat where larvae develop. Lotic tadpoles (i.e., M. tumifrons group and M. krauczuki) in general exhibit a more depressed body, a longer tail with lower fins, and larger oral discs than lentic forms (i.e., M. stelzneri group, M. moreirae, M. sanmartini, and M. langonei). Despite their peculiar, confined microhabitat, phytotelm larvae do not diverge markedly from non-arboreal species. Distinctive features of all species are the presence of pineal end organ and the placement of the intestinal reversal point at the left of the abdomen in typical larval stages. Buccal cavity and musculoskeletal anatomy are quite conserved between species, yet some characters differ from those of other bufonids. The presence of one pair of subhyoid muscles is apparently an exclusive trait of Melanophryniscus among Bufonidae.