Morphology and histology of pituitary gland of torrential stream fish Nemacheilus mooreh (sykes).

Author(s): Kharat S. S.*, Y. K. Khillare

Abstract

Pituitary lies ventral to the brain behind optic chiasma in the depression of parasphenoid bone attached to the floor of the mid ventral infundibulum. It is Leptobasic type and show transitional condition between caudo and dorsobasic type, sella turcica, a depression provides space to lodge pitutary with thick connective tissue septum. The pituitary gland is composed of nervous part, the neurohypophysis, and a glandular part, the adenohypophysis. The neurohypophysis develops from the infundibular floor and provides a stalk to pituitary. The distal part of neurohypophysis is brightly stained due to presence of neuro secretory material. The positively stained neurosecretory fibres extensively innervate the pars intermedia and rostral pars distalis. Adenohypophysis develops from the roof of the stomodaeum and is divisible into pars intermedia and pars distalis. Pars distalis is composed of a proximal part containing deeply stained cyanophils and acidophils. The rostral and proximal pars distalis and pars intermedia are arranged in a linear fashion with the rostral pars distalis at the anterior extremity. In N. mooreh, pars intermedia completely surround the distal region of neurohypophysis. The study will provide a deeper insight into morphohistology and cell types of pituitary gland of the freshwater Homalopterid teleost.

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