INVESTIGADORES
QUINZIO Silvia Ines
artículos
Título:
The Lateral Line System in Anuran Tadpoles: Neuromasts Morphology, Arrangement and Innervation
Autor/es:
QUINZIO, SILVIA INÉS; FABREZI, MARISSA
Revista:
ANATOMICAL RECORD-ADVANCES IN INTEGRATIVE ANATOMY AND EVOLUTIONARY BIOLOGY
Editorial:
WILEY-LISS, DIV JOHN WILEY & SONS INC
Referencias:
Lugar: New York; Año: 2014 vol. 297 p. 1508 - 1522
ISSN:
1932-8486
Resumen:
Anuran larvae have been classified into four morphological types which reflect intraordinal macroevolution. At present, complete characterizations of the lateral line system are only available for Xenopus laevis (Type I) and Discoglossus pictus (Type III). We analyzed the morphology, arrangement and innervation of neuromasts related to the anterodorsal and anteroventral lateral line nerves in ten anuran species representing Types I, II, and IV with the aim of interpreting the existing variation and discussing the evolution of the lateral line in anuran larvae. We found: 1) the presence of two orbital and three mandibular neuromast lines in all anuran larvae studied, 2) the ventral arrangement of mandibular neuromast lines appears to have evolved convergently in larval types I and II, and the lateroventral arrangement of mandibular lines of neuromasts appears to have evolved in larval types III and IV; 3) interspecific variation in the organization, size and number of sensory cells per neuromasts within the lines; 4) the supralabial extension of the Angular line in Lepidobatrachus spp. and the tentacular location of the Oral neuromasts in Xenopus laevis are concomitant with their particular morphologies. Based on the variation described we find that the lateral line system in anuran larvae seems to have been maintained without significant changes, with the exception of Lepidobatrachus spp. and Xenopus. These unique features added to other of Lepidobatrachus tadpoles are sufficient to propose a new larval Type (V).