Journal of Biosciences

, Volume 20, Issue 3, pp 385–396 | Cite as

Fine structure of olfactory epithelium inSchizothoraichthys progastus McClelland andSchizothorax richardsonii Gray (Cyprinidae: Teleostei) from Garhwal Himalaya (India)

  • N. Singh
  • K. C. Bhatt
  • Mukesh K. Bahuguna
  • Dharmendra Kumar


The olfactory epithelium of two closely related species of snowtrout—Schizothoraichthys progastus McClelland andSchizothorax richardsonii Gray (Subfamily: Schizothoracinae. family-Cyprinidae, Teleostei), from a perennial glacier-fed river Mandakini of Garhwal hills was studied by employing transmission electron microscopic method The olfactory lamella comprises two epithelia—anterior and posterior, with a stroma sandwiched in between. Both are strartified. The anterior one is thicker than posterior. InSchizothoraichithys progastus, the sensory part of epithelium has two types of receptor cells—ciliated receptor cells and rod cells whilst inSchizothorax richardsonii, there arc three types of receptor cells—ciliated receptor cells, microvillous receptor cells and rod cells in addition to sustentacular cells, basal cells and mucous cells. While inhabiting similar hillstream habitat, the differential ecological niches, feeding habits etc., account for the presence of different receptor cell types in these species, It implies the possible diversification at cellular and physiological levels so as to minimize the competition by using varied olfactory cues.


Snowtrout coldwater billstream receptor cells cilia microvilli rods 

Abbreviations used


Ciliated receptor cells


rod cells


olfactory knob


microvillous receptor cells


sustentacular cells












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Copyright information

© Indian Academy of Sciences 1995

Authors and Affiliations

  • N. Singh
    • 1
  • K. C. Bhatt
    • 1
  • Mukesh K. Bahuguna
    • 1
  • Dharmendra Kumar
    • 1
  1. 1.Zoology DepartmentHNB Garhwal UniversitySrinagar GarhwalIndia

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