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Journal of Biosciences

, Volume 25, Issue 2, pp 173–179 | Cite as

The structure of the nasal chemosensory system in squamate reptiles. 1. The olfactory organ, with special reference to olfaction in geckos

  • Susan J. Rehorek
  • Bruce T. Firth
  • Mark N. Hutchinson
Article
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Abstract

The luminal surface of the chemosensory epithelia of the main olfactory organ of terrestrial vertebrates is covered by a layer of fluid. The source of this fluid layer varies among vertebrates. Little is known regarding the relative development of the sources of fluid (sustentacular cells and Bowman’s glands) in reptiles, especially in gekkotan lizards (despite recent assertions of olfactory speciality). This study examined the extent and morphology of the main olfactory organ in several Australian squamate reptiles, including three species of gekkotans, two species of skinks and one snake species. The olfactory mucosa of two gekkotan species (Christinus marmoratus and Strophurus intermedius) is spread over a large area of the nasal cavity. Additionally, the sustentacular cells of all three gekkotan species contained a comparatively reduced number of secretory granules, in relation to the skinks or snake examined. These observations imply that the gekkotan olfactory system may function differently from that of either skinks or snakes. Similar variation in secretory granule abundance was previously noted between mammalian and non-mammalian olfactory sustentacular cells. The observations in gekkotans suggests that the secretory capacity of the non-mammalian olfactory sustentacular cells show far more variation than initially thought.

Keywords

Fluid layer morphology olfaction squamate reptilesvector 

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References

  1. Andres K H 1969 Der olfaktorische Saum der Katze; Z. Zellforsch. Mikrosk. Anat. 96 250–274CrossRefGoogle Scholar
  2. Barka T and Anderson P J 1965 Histochemistry: Theory, practice and bibliography (New York: Harper and Row)Google Scholar
  3. Dial B E and Schwenk K 1996 Olfaction and predator detection in Coleonyx brevis (Squamata: Eublepharidae), with comments on the functional significance of bucca; pulsing in geckos; J. Exp. Zool. 276 415–424CrossRefGoogle Scholar
  4. Drury R A B and Wallington E A 1980 Carleton’s histological technique (Oxford: Oxford University Press)Google Scholar
  5. Eisthen H L, Seneglaub D R, Schroeder D M and Alberts J R 1994 Anatomy and forebrain projections of the olfactory and vomeronasal organs in axolotls (Ambystoma mexicanum); Brain Behav. Evol. 44 108–124CrossRefGoogle Scholar
  6. Farbman A I and Gesteland R C 1974 Fine structure of olfactory epithelium in the mud puppy, Necturus maculosus; Am. J. Anat. 139 227–244CrossRefGoogle Scholar
  7. Frisch D 1967 Ultrastructure of mouse olfactory mucosa; Am. J. Anat. 121 87–120CrossRefGoogle Scholar
  8. Gabe M and Saint Girons H 1976 Contribution a la morphologie compareé des fosses nasales et de leur annexes chez les Lépidosauriens; Mém. Mus. Nat. Hist. Nat. A98 1–87Google Scholar
  9. Getchell M L and Getchell T V 1992 Fine structural aspects of secretion and extrinsic innervation in the olfactory mucosa; Micros. Res. Tech. 23 111–127CrossRefGoogle Scholar
  10. Getchell M L, Rafols J A and Getchell T V 1984a Histological and histochemical components of the salamander olfactory mucosa: effects of Isoproterenol and olfactory nerve section; Anat. Rec. 208 553–565CrossRefGoogle Scholar
  11. Getchell T V, Margolis F L and Getchell M L 1984b Perireceptor and receptor events in vertebrate olfaction; Prog. Neurobiol. 23 317–345CrossRefGoogle Scholar
  12. Halpern M 1992 Nasal chemical senses in reptiles: Structure and function; in Biology of the Reptilia. Vol. 18, Physiology E (eds) C Gans and D Crews (Chicago: University of Chicago) pp 424–532Google Scholar
  13. Iwahori N, Kiyota E and Nakamura K 1987 Olfactory and respiratory epithelia in the snake, Elaphe quadrivirgata; Okaj. Fol. Anat. Jpn. 64 183–192CrossRefGoogle Scholar
  14. Jones F M, Pfeiffer C J and Asashima A 1994 Ultrastructure of the olfactory organ of the newt, Cynops pyrrhogaster; Ann. Anat. 176 269–275CrossRefGoogle Scholar
  15. Junquiera L C, Carneiro J and Kelley R O 1989 Basic histology (New Jersey: Prentice-Hall)Google Scholar
  16. Kleerekoper H 1969 Olfaction in fishes (Bloomington: Indiana University Press)Google Scholar
  17. Kratzing J E 1975 The fine structure of the olfactory and vomeronasal organs of a lizard (Tiliqua scincoides scincoides); Cell Tissue Res. 156 239–252CrossRefGoogle Scholar
  18. Lillie R D 1954 Histopathologic technic and practical histochemistry (New York: Blakiston Co.)Google Scholar
  19. Müller H, Drenkhahn D and Haase E 1979 Vergleichend quantitative und ultrastrukturelle Untersuchungen am Geruchsorgan von Haustaubenrassen; Z. Mikrosk. Anat. Forsch. 93 888–900PubMedGoogle Scholar
  20. Ravetto C 1964 Alcian blue-Alcian yellow: A new method for the identification of different acid groups; J. Histochem. Cytochem. 12 44–45CrossRefGoogle Scholar
  21. Reese T S 1965 Olfactory cilia in the frog; J. Cell Biol. 25 209–230CrossRefGoogle Scholar
  22. Schwenk K 1993a Are geckoes olfactory specialists?; J. Zool. London 229 289–302CrossRefGoogle Scholar
  23. Schwenk K 1993b The evolution of chemoreception in squamate reptiles: a phylogenetic approach; Brain Behav. Evol. 41 124–137CrossRefGoogle Scholar
  24. Schwenk K 1994 Why snakes have forked tongues; Science 263 1573–1577CrossRefGoogle Scholar
  25. Schwenk K 1995 Of tongues and noses: Chemoreception in lizards and snakes; Tree 10 7–12PubMedGoogle Scholar
  26. Stebbins R C 1948 Nasal structure in lizards with reference to olfaction and conditioning of the inspired air; Am. J. Anat. 83 183–221CrossRefGoogle Scholar
  27. Wang R T and Halpern M 1980 Scanning electron microscopic studies of the surface morphology of the vomeronasal epithelium and olfactory epithelium of garter snakes; Am. J. Anat. 157 399–428CrossRefGoogle Scholar

Copyright information

© Indian Academy of Sciences 2000

Authors and Affiliations

  • Susan J. Rehorek
    • 1
  • Bruce T. Firth
    • 1
  • Mark N. Hutchinson
    • 2
  1. 1.Department of Anatomical SciencesUniversity of AdelaideAdelaideAustralia
  2. 2.Herpetology SectionSouth Australian MuseumAdelaideAustralia

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