The Lateral Line System in Anuran Tadpoles: Neuromast Morphology, Arrangement, and Innervation

Silvia Quinzio; Marissa Fabrezi

doi:10.1002/ar.22952

journal article May 26, 2014

The Lateral Line System in Anuran Tadpoles: Neuromast Morphology, Arrangement, and Innervation

Silvia Quinzio Marissa Fabrezi

The Anatomical Record Vol. 297 No. 8 pp. 1508-1522 · Wiley

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Abstract

ABSTRACTAnuran 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 10 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 neuromast within the lines; and (4) the supralabial extension of the Angular line in Lepidobatrachus spp. and the tentacular location of the Oral neuromasts in X. 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). Anat Rec, 297:1508–1522, 2014. © 2014 Wiley Periodicals, Inc.

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Details

Published: May 26, 2014
Vol/Issue: 297(8)
Pages: 1508-1522
License: View

Authors

S

Silvia Quinzio

Instituto de Bio y Geociencias (IBIGEO) Centro Científico Tecnológico‐CONICET and Universidad Nacional de Salta Mendoza 2 4400 Salta República Argentina

M

Marissa Fabrezi

Instituto de Bio y Geociencias (IBIGEO) Centro Científico Tecnológico‐CONICET and Universidad Nacional de Salta Mendoza 2 4400 Salta República Argentina

Funding

Agencia Nacional de Promoción Científica y Tecnológica Award: PICT Bicentenario 0616

Cite This Article

Silvia Quinzio, Marissa Fabrezi (2014). The Lateral Line System in Anuran Tadpoles: Neuromast Morphology, Arrangement, and Innervation. The Anatomical Record, 297(8), 1508-1522. https://doi.org/10.1002/ar.22952

The Lateral Line System in Anuran Tadpoles: Neuromast Morphology, Arrangement, and Innervation

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