Distribution and morphology of the ampullary organs of the salmontail catfish, Arius graeffei

Journal of Morphology
Darryl L WhiteheadLina Y M Daddow

Abstract

Whole body staining of Arius graeffei revealed that ampullary pores cover the body with their highest densities occurring on the head and lowest densities on the mid-ventral surface. Each ampullary organ consists of a long canal (0.2-1.75 mm) passing perpendicular to the basement membrane, through the epidermis into underlying dermal connective tissues, curving thereafter to run roughly parallel to the epidermis. Histochemical staining techniques (Alcian blue and Lillie's allochrome) indicate that the canals contain a neutral to acidic glycoprotein-based mucopolysaccharide gel that varies in composition along the length of the canal. Collagen fibers, arranged in a sheath, surround a layer of squamous epithelium that lines each ampullary canal. At the proximal end of the canal, squamous cells are replaced by cuboidal epithelial cells that protrude into the lumen, thus constricting the lumen to form a small pore into the ampulla. The ampulla is lined with receptor and supportive cells. The numerous (60-120) pear-shaped receptor cells bear microvilli on their luminal surface. Two forms of receptor cells exist in each ampullary organ: basal and equatorial receptor cells. Each receptor cell is connected to an unmyelinated nerve. Eac...Continue Reading

References

Jan 1, 1966·Acta Physiologica Scandinavica·H LinderholmB Söderström
Sep 29, 1964·Proceedings of the Royal Society of London. Series B, Containing Papers of a Biological Character·A M MULLINGER

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Citations

Dec 11, 2002·Journal of Morphology·Darryl L WhiteheadLina Y M Daddow
Aug 28, 2007·The Anatomical Record : Advances in Integrative Anatomy and Evolutionary Biology·Susana CamachoRamón Carmona
Nov 14, 2000·Journal of Morphology·D L WhiteheadL Y Daddow
Nov 29, 2012·Journal of Comparative Physiology. A, Neuroethology, Sensory, Neural, and Behavioral Physiology·Nicole U Czech-DamalWolf Hanke
Aug 19, 2015·Journal of Morphology·Darryl L WhiteheadIan R Tibbetts
Dec 18, 2014·Journal of Morphology·Darryl L WhiteheadIan R Tibbetts
Feb 13, 2018·Journal of Fish Biology·A R G GauthierM B Bennett
Dec 25, 2003·Journal of Physiology, Paris·Darryl L Whitehead

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