The ontogeny of the lateral line system in Telmatobius atacamensis (Anura, Telmatobiidae)
| Autor: | Silvia Inés Quinzio |
|---|---|
| Rok vydání: | 2019 |
| Předmět: |
0106 biological sciences
0301 basic medicine media_common.quotation_subject Lateral line Ontogeny Morphological variation 010603 evolutionary biology 01 natural sciences 03 medical and health sciences Trunk line Pseudis paradoxa Animals Metamorphosis media_common Skin Larva Telmatobius atacamensis biology biology.organism_classification Lateral Line System 030104 developmental biology Evolutionary biology Animal Science and Zoology Anura Mechanoreceptors Developmental Biology |
| Zdroj: | Journal of morphologyREFERENCES. 281(1) |
| ISSN: | 1097-4687 |
| Popis: | The lateral line system in anurans is functional during aquatic stages and therefore could provide characters related to larval morphological variation. However, few studies have addressed its components in an integrated overview, and little is known about its ontogenetic variation. This study describes the postembryonic trajectory of the lateral system in Telmatobius atacamensis up to its metamorphic regression. This includes structure, number, topography, and innervation of neuromasts, to contribute new and complete information about its larval organization and its temporal sequence of regression. The arrangement and innervation of lateral lines in T. atacamensis resembles those described for other Type IV tadpoles. Its distinctive features are the orientation of the neuromast stitches in the lateral lines, the presence of supraotic neuromasts, and the first-described case of asymmetry of the ventral trunk line. The temporal sequence of regression during metamorphosis differs between the lateral lines and the lateral line nerves, which remain myelinated into postmetamorphic stages. This asynchronous pattern between different components of the system has also been described for Pseudis paradoxa, which shares with T. atacamensis a remarkably long larval period. This long larval period and gradual metamorphosis could also be related to the constitutive metamorphic regression of the system, in spite of the aquatic lifestyle of these frogs. |
| Databáze: | OpenAIRE |
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