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.

中文翻译：

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Telmatobius atacamensis (Anura, Telmatobiidae)侧线系统的个体发育

无尾目中的侧线系统在水生阶段发挥作用，因此可以提供与幼虫形态变异相关的特征。然而，很少有研究在综合概述中讨论其组成部分，对其个体遗传变异知之甚少。这项研究描述了 Telmatobius atacamensis 横向系统的胚胎后轨迹，直到其变质回归。这包括神经瘤的结构、数量、地形和神经支配，以提供有关其幼虫组织及其回归时间序列的新的完整信息。T. atacamensis 侧线的排列和支配类似于其他 IV 型蝌蚪的描述。其显着特征是侧线中神经瘤针迹的方向，上神经瘤的存在，以及第一个描述的腹侧干线不对称的情况。变态过程中退化的时间顺序在侧线和侧线神经之间不同，这些神经在变形后阶段保持有髓鞘。系统不同组件之间的这种异步模式也被描述为 Pseudis paradoxa，它与 T. atacamensis 共享一个非常长的幼虫期。尽管这些青蛙的水生生活方式，这种漫长的幼虫期和逐渐变态也可能与系统的本构变态退化有关。系统不同组件之间的这种异步模式也被描述为 Pseudis paradoxa，它与 T. atacamensis 共享一个非常长的幼虫期。尽管这些青蛙的水生生活方式，这种漫长的幼虫期和逐渐变态也可能与系统的本构变态退化有关。系统不同组件之间的这种异步模式也被描述为 Pseudis paradoxa，它与 T. atacamensis 共享一个非常长的幼虫期。尽管这些青蛙的水生生活方式，这种漫长的幼虫期和逐渐变态也可能与系统的本构变态退化有关。