The fine structure of the lateral-line organs of larval Ichthyophis (Amphibia: Gymnophiona)

Journal of Morphology
Ulrich WahnschaffeWerner Himstedt

Abstract

Light and electron microscopic observations of the lateral-line organs of larval Ichthyophis kohtaoensis confirmed earlier reports of the occurrence of two different types of lateral-line organs. One type, the ampullary organ, possesses 15-26 egg-shaped sensory cells. Each sensory cell extends a single kinocilium surrounded by a few microvilli into the ampullary lumen. This is in contrast to the ampullary organs of urodele amphibians that contain only microvilli. The second type of organ, the ordinary neuromast, has 15-24 pear-shaped sensory cells arranged in two to three rows. Each sensory cell shows a kinocilium that is asymmetrically placed with respect to both a basal plate and approximately 60 stereovilli. The sensory cells of ampullary organs are always separated by supporting cells; those of neuromasts are occasionally in contact with one another. Numerous (neuromasts) or few (ampullary organs) mantle cells separate the organs from the epidermal cells. Only afferent synapses are found in the ampullary organs whereas vesicle-filled fibers together with afferent nerve terminals are found in neuromasts. Both organs contain similarly sized presynaptic spheres adjacent to the afferent fibers. It is suggested that the neuromas...Continue Reading

References

Oct 1, 1976·Cell and Tissue Research·A Roth, H Tscharntke
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Citations

Aug 28, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Susana CamachoRamón Carmona
Jan 1, 1987·Anatomy and Embryology·U WahnschaffeB Fritzsch
Oct 15, 1990·The Journal of Comparative Neurology·B FritzschD Y Sanchez
Dec 15, 2005·Zoology : Analysis of Complex Systems, ZACS·Gerhard Schlosser
Dec 15, 2005·Zoology : Analysis of Complex Systems, ZACS·Gerhard Schlosser

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