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Metamorphosis in the Marine Snail Ilyanassa obsoleta, Yes or NO?
TLDR
It is determined that NO donors block pharmacologically induced metamorphosis in the mud snail Ilyanassa obsoleta, whereas injections of inhibitors of nitric oxide synthase (NOS) allow competent larvae to become juveniles.
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Serotonin and Nitric Oxide Regulate Metamorphosis in the Marine Snail Ilyanassa obsoleta1
TLDR
Results of neuroanatomical studies suggest that the production of nitric oxide (NO) increases throughout the planktonic stage and that NO production is necessary for the maintenance of the larval state, especially as it becomes metamorphically competent.
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Serotonin Injections Induce Metamorphosis in Larvae of the Gastropod Mollusc Ilyanassa obsoleta.
TLDR
The results of the experiments support the idea that serotonergic neurons are active during larval metamorphosis of Ilyanassa and that 5-HT does not induce meetamorphosis by binding to epidermal chemoreceptors.
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NADPH‐Diaphorase activity changes during gangliogenesis and metamorphosis in the gastropod mollusc Ilyanassa obsoleta
  • M. Lin, E. Leise
  • Biology
    The Journal of comparative neurology
  • 14 October 1996
TLDR
Evidence is provided for the existence of a nitrergic signalling system in molluscan larvae and juveniles and the distribution of NOS activity in the nervous systems of larvae, including metamorphosing individuals, and juveniles of the marine snail Ilyanassa obsoleta.
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Chiton integument: Ultrastructure of the sensory hairs of Mopalia muscosa (Mollusca: Polyplacophora)
TLDR
The dorsal integument of the girdle of the chiton Mopalia muscosa is covered by a chitinous cuticle about 0.1 mm in thickness and the function of the hairs is unknown, and it is not determined whether the sensory cells are primary sensory neurons or secondary sensory cells.
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Modular construction of nervous systems: A basic principle of design for invertebrates and vertebrates
  • E. Leise
  • Biology
    Brain Research Reviews
  • 30 April 1990
View on Elsevier
Induction of metamorphosis in the marine gastropod Ilyanassa obsoleta: 5HT, NO and programmed cell death.
The central nervous system (CNS) of a metamorphically competent larva of the caenogastropod Ilyanassa obsoleta contains a medial, unpaired apical ganglion (AG) of approximately 25 neurons that lies…
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Localization of nitric oxide synthase-like immunoreactivity in the developing nervous system of the snail Ilyanassa obsoleta
TLDR
Production of nitric oxide (NO) appears to be required for the maintenance of the larval state in the gastropod mollusc Ilyanassa obsoleta and NOS-like immunoreactivity (NOS-IR) is localized to 3 populations of cells in competent larvae: somata of the AG and putative sensory neurons in the edge of the mantle and foot.
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The snail Ilyanassa: a reemerging model for studies in development.
TLDR
An overview of aspects of Ilyanassa obsoleta biology and use are presented, especially as a model for the spiralian development program, a distinctive mode of early development shared by a large group of animal phyla, but poorly understood.
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Induction of Metamorphosis Decreases Nitric Oxide Synthase Gene Expression in Larvae of the Marine Mollusc Ilyanassa obsoleta (Say)
TLDR
Investigation of expression of the neuronal nitric oxide synthase (nNOS) gene in larval and metamorphosing individuals of the marine mud snail Ilyanassa obsoleta indicates that nNOS is expressed at constant levels throughout larval development, and decreases markedly during the first 24 h of metamorphosis.
View on U Chicago Press
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