Journal ArticleDOI
Olfactory and vomeronasal projections and the pathway of the nervus terminalis in ten species of salamanders: a whole-mount study employing the horseradish-peroxidase technique
TLDR
Primary olfactory and vomeronasal projections as well as the pathway of the nervus terminalis were studied in 10 representative species of salamandrid and plethodontid salamanders by means of injections of horseradish peroxidase and examination of whole-mount preparations.Abstract:
Primary olfactory and vomeronasal projections as well as the pathway of the nervus terminalis were studied in 10 representative species of salamandrid and plethodontid salamanders by means of injections of horseradish peroxidase and examination of whole-mount preparations. Olfactory projections are very similar in the different urodeles, but vomeronasal projections differ in shape and number of termination fields. Whereas the direct-developing Plethodontini and Bolitoglossini reveal only one or two fields, the salamandrid species and the members of the plethodontid tribes Desmognathinae and Hemidactyliini, all possessing an aquatic larval stage, exhibit several vomeronasal projection fields. In all species examined centrifugal axons of the nervus terminalis leave the olfactory projection area ventrocaudally and terminate in the preoptic region and the hypothalamus.read more
Citations
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Journal ArticleDOI
Evolution of Vertebrate Olfactory Systems
TL;DR: A phylogenetic analysis of central olfactory projections indicates that at least three distinct olf factory subsystems may be broadly present in vertebrates and that a fourth, the accessory vomeronasal system, arose in tetrapods.
Journal ArticleDOI
Phylogeny of the vomeronasal system and of receptor cell types in the olfactory and vomeronasal epithelia of vertebrates.
TL;DR: The presence of a discrete vomeronasal system appears to be a derived character in tetrapods, and its presence in larval amphibians indicates that the system did not arise as a terrestrial adaptation.
Journal ArticleDOI
Paedomorphosis and simplification in the nervous system of salamanders.
TL;DR: It is suggested that, although increasing genome size and paedomorphosis tend to compromise the function of the salamander brain, compensating mechanisms have evolved that may restore or even enhance brain function.
Journal ArticleDOI
Effects of Experimental Delivery of Male Courtship Pheromones on the Timing of Courtship in a Terrestrial Salamander, Plethodon jordani (Caudata: Plethodontidae)
TL;DR: The hypothesis that, if a P. jordani pair engages in courtship, female receptivity will be increased following the application of male courtship pheromones is tested and shows that courtship time was significantly reduced for those pairs in which the female was reated with the phersomone solution.
Journal ArticleDOI
Nitric oxide synthase in the brain of a urodele amphibian (Pleurodeles waltl) and its relation to catecholaminergic neuronal structures
Agustín González,Alberto Muñoz,M. Muñoz,Oscar Marín,Rosario Arévalo,Angel Porteros,José R. Alonso,José R. Alonso +7 more
TL;DR: Double labeling techniques revealed an extensive codistribution of neurons with NOS and catecholamines in the urodele brain but actual colocalization in the same cells was never observed.
References
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MonographDOI
Comparative osteology and evolution of the lungless salamanders, family Plethodontidae.
Journal ArticleDOI
The terminal nerve: a new chemosensory system in vertebrates?
Leo S. Demski,RG Northcutt +1 more
TL;DR: Correlations between terminal nerve projections and neurobehavioral studies suggest that the terminal nerve mediates responses to sex pheromones.
Journal ArticleDOI
Centrifugal innervation of the retina by luteinizing hormone releasing hormone (LHRH)-immunoreactive telencephalic neurons in teleostean fishes.
TL;DR: It is proposed that the nucleus olfactoretinalis anatomically and functionally interconnects and integrates parts of the olfactory and optic systems.
Journal ArticleDOI
Intra- and interspecific communication in salamanders through chemical signals on the substrate
TL;DR: It is suggested that body secretions and/or faecal material may act as signal markers during territorial defence in red-backed and Shenandoah salamanders as well as in other Plethodon species.
Journal ArticleDOI
Centrifugal innervation of goldfish retina from ganglion cells of the nervus terminalis
TL;DR: Application of cobaltous‐lysine to a cut olfactory tract resulted in cobalt‐filled fibers in the optic tracts, retinal optic fiber layer, and retinal ganglion cell layer, however, the precise terminations of these fibers within the retina could not be readily established.