Metamorphosis of the olfactory organ of the sea lamprey (Petromyzon marinus L.): Morphological changes and morphometric analysis

Journal of Morphology
Jamie Van DenbosscheB S Zielinski

Abstract

In larval sea lampreys (Petromyzon marinus), a small, relatively inconspicuous olfactory organ sac contains small, densely packed olfactory receptor neurons and sustentacular cells. During metamorphosis, the larval organ transforms into a prominent lamellar structure with large distinct olfactory epithelial cells that is characteristic of the adult lamprey. In the present study, scanning electron microscopy and light microscopy are used to examine changes during the seven stages (1-7) of metamorphosis. The magnitude of growth over the course of metamorphosis is evident from the doubling of the relative weight of the nasal sac. During early metamorphosis (stages 1 and 2), the larval olfactory organ enlarges, and by stage 3 specific adult structures begin to form, namely a nasal valve between the nasal tube and the organ, lamellar folds, and diverticuli of the accessory olfactory organ. Subsequent development involves widening of the cells lining the lamellar folds to the form characteristic of postmetamorphic lampreys. Although the cells in the troughs initially retain numerical density values that are significantly higher than those on the lamellar surfaces, by stage 7 values decline both in troughs and along lamellar surfaces ...Continue Reading

References

Apr 1, 1978·Canadian Journal of Zoology·I C PotterJ H Youson
Jan 29, 1996·The Journal of Comparative Neurology·B S ZielinskiE Wong

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Citations

Aug 20, 2003·The Journal of Comparative Neurology·Andrea FrontiniBarbara S Zielinski
Nov 27, 2015·Frontiers in Zoology·Tyler J BuchingerWeiming Li
Dec 23, 2020·Open Biology·Guillaume Poncelet, Sebastian M Shimeld
Jan 27, 2007·Neuroscience Letters·A J LaframboiseB S Zielinski
Feb 5, 2011·Journal of Chemical Neuroanatomy·M J DoldánE de Miguel Villegas

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