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The lateral line and electrosensory systems of two holocephalans
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The lateral line and electrosensory systems of two holocephalans
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Journal Article
The lateral line and electrosensory systems of two holocephalans
2025
Overview
The mechanosensory (lateral line) and electrosensory systems are two important non-visual sensory modalities, especially in low light environments. Despite their importance, these sensory systems have received little attention in deepwater chondrichthyans. Here, we describe the morphological organisation of the peripheral lateral line and electrosensory systems in two species of chimaeras; the pale ghost shark
Hydrolagus bemisi
(Chimaeridae) and the Australasia narrow-nosed spookfish
Harriotta avia
(Rhinochimaeridae), occupying depth ranges of 400–1,100 m and 260–1,278 m, respectively. Using topographic mapping, computed tomography, histology, and scanning electron microscopy, the distribution, abundance, size, and microstructure of lateral line grooves and organs (neuromasts), and ampullary organs (pores, canals, and bulbs) are described. The arrangement of the peripheral sense organs in both these systems may reflect comparable feeding strategies for detecting benthic prey. While the elongated rostrum of
Harriotta avia
is likely used as a sensory probe, providing spatially-resolved information about minute hydrodynamic disturbances and electric fields of potential prey beneath the animal, the arrangement of sense organs in
Hydrolagus bemisi
indicates that this species may rely less on electroreception. The study compares the morphology and provides information on the relative importance of two (non-visual) sensory modalities in two demersal holocephalans that remain vulnerable to anthropogenic disturbances.
Publisher
Nature Publishing Group UK,Nature Publishing Group,Nature Portfolio
Subject
/ 631/601
/ 692/698
/ Animals
/ Brain
/ Deep sea
/ Electric Organ - anatomy & histology
/ Humanities and Social Sciences
/ Lateral Line System - anatomy & histology
/ Lateral Line System - physiology
/ Lateral Line System - ultrastructure
/ Microscopy, Electron, Scanning
/ Prey
/ Rostrum
/ Scanning electron microscopy
/ Science
/ Sharks - anatomy & histology
/ Skin
