Макроморфологія органа нюху в'юна звичайного Misgurnus fossilis

Abstract

In the article the morphology of olfactory organ of the adult European weatherfish Misgurnus fossilis is studied using the light microscopy. It is determined that olfactory chambers have a structure that is typical for teleostei and are connected to the external environment with the incurrent tubular nostril and the large excurrent nostril. Nostrils are close to each other, excurrent nostril is more ventral compared to the incurrent one. Olfactory ridge is formed that enables the better water inflow to the olfactory cavity. On the medial wall of olfactory chamber of the European weatherfish, olfactory rosette of the fan shape is situated. It consists of ten olfactory lamellae. Three types of lamellae can be distinguished by their shape, pigmentation and location in the olfactory cavity. In the epithelium covering olfactory lamellae, there is a great number of mucous cells. Such morphology of olfactory chambers is typical for the species that is restricted to stagnant or slow-flowing water with soft and mud bottom and feeds on detritus and benthic invertebrate species.