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The formation of the epicuticle and associated structures inOniscus asellus (Crustacea, Isopoda)

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Summary

The integument of the woodlouse,Oniscus asellus, consists of a two-layered epicuticle, a largely lamellate procuticle — itself divided into two regions (pre-and postecdysial cuticles), and the epidermis. At the initiation of new cuticle production the epidermal cells become vacuolated and retract away from the cuticle. Apolysis occurs immediately after the cessation of postecdysial cuticle production. The formation of the epicuticle is unique among the arthropods since material aggregates along the distal epidermal membrane. By indenting, doubling back on itself, and incorporating septa, the epicuticle forms surface structures such as plaques and tricorns.

The innervation, and so the receptive function of the tricorns is confirmed, but since there is no connection between the old and new receptors during premoult, sensory information from these exoreceptors must be severely curtailed. This may explain the biphasic moult in all isopods since it ensures that only half the body experiences this sensory deprivation at any one time. In terrestrial species there is the additional advantage of restricting the area of permeable new cuticle. The frequency of moulting may be due to the need to renew disrupted receptor surfaces.

Tricorns do not appear to be the mechanoreceptors involved in the marked thigmotactic response of woodlice since they do not have the typical internal structure of such receptors; rather, the dendrite —which extends into the lumen of the tricorn —is protected from deformation by the previously unreported combination of a dendritic sheath and a cuticular tube. The modality of tricorns is possibly one of hygro-perception. One of the behavioural responses of woodlice to desiccation is aggregation. The numerical distribution of tricorns over the body surface is admirably suited to assist in the formation and maintenance of such aggregates during desiccation and to their observed dispersal when the relative humidity rises.

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References

  • Allee, W.C.: Studies in animal aggregations: causes and effects of bunching in land isopods. J. exp. Zool.45, 255–277 (1926)

    Google Scholar 

  • Altner, H., Sass., H., Altner, I.: Relationship between structure and function of antennal chemohygro- and thermoreceptive sensilla inPeriplaneta amevicana. Cell Tiss. Res.176, 389–405 (1977)

    Google Scholar 

  • Cals, P.: Mise en évidence par microscope électronique à balayage de champs morphologiques polarisés, exprimés par les cellules épidermiques normales dans l'appendice locomoteur des Arthropodes:Tylos latreille (Audouin) (Crustacé, Isopode) etPeriplaneta americana (L.) (Insecte, Dictyoptère). C.R. Acad. Sc. Paris279D, 663–666 (1974)

    Google Scholar 

  • Clifford, B., Witkus, E.R.: The fine structure of the hepatopancreas of the woodlouseOniscus asellus. J. Morph.135, 335–350 (1971)

    Google Scholar 

  • Cloudsley-Thompson, J.L.: Do woodlice carry their own hygrometers? New Scientist21, 376 (1964)

    Google Scholar 

  • Cloudsley-Thompson, J.L.: The water and temperature relations of woodlice. Meadowfield Press Ltd., Shildon (1977)

    Google Scholar 

  • Dethier, V.G., Schoonhoven, L.M.: Evaluation of evaporation by cold and humidity receptors in caterpillars. J. Insect Physiol.14, 1049–1054 (1968)

    Google Scholar 

  • Edney, E.B.: The body temperature of woodlice. J. exp. Biol.28, 271–280 (1951)

    Google Scholar 

  • Edney, E.B.: Transition from water to land in isopod crustaceans. Am. Zool.8, 309–326 (1968)

    Google Scholar 

  • Friedlander, C.P.: Thigmokinesis in woodlice. Anim. Behav.12, 164–174 (1964)

    Google Scholar 

  • George, R.W., Sheard, K.: Ecdysis in the isopodPorcellio scaber (Latreille). Aust. J. Zool.2, 75–85 (1954)

    Google Scholar 

  • Green, J.P., Neff, M.R.: A survey of the fine structure of the integument of the fiddler crab. Tissue and Cell4, 137–171 (1972)

    Google Scholar 

  • Greenwood, M.T., Holdich, D.M.: A structural study of the sensilium of two species of bird flea,Ceratophyllus (Insecta: Siphonaptera). J. Zool., Lond.187, 21–38 (1979)

    Google Scholar 

  • Halcrow, K.: The fine structure of the carapace integument ofDaphina magna Strauss (Crustacea: Branchiopoda). Cell Tissue Res.169, 267–276 (1976)

    Google Scholar 

  • Hayes, W.F.: Fine structure of the chemoreceptor sensilium inLimulus. J. Morph.133, 205–240 (1971)

    Google Scholar 

  • Holdich, D.M.: A comparison of the ecology and life cycles of two species of littoral isopod. J. exp. mar. Biol. Ecol.24, 133–149 (1976)

    Google Scholar 

  • Holdich, D.M., Lincoln, R.J.: An investigation of the surface of the cuticle and associated sensory structures of the terrestrial isopodPorcellio scaber. J. Zool., Lond.172, 469–482 (1974)

    Google Scholar 

  • Holdich, D.M., Mayes, K.R.: A fine-structural re-examination of the so-called ‘midgut’ of the isopodPorcellio. Crustaceana29, 186–192 (1975)

    Google Scholar 

  • Jans, D.E., Ross, K.F.A.: A histological study of the peripheral receptors in the thorax of the land isopods with special reference to the location of possible hygroreceptors. Q. Jl microsc. Sci.104, 337–350 (1963)

    Google Scholar 

  • Jenkin, P.M., Hinton, H.E.: Apolysis in arthropod moulting cycles. Nature, Lond.211, 871 (1966)

    Google Scholar 

  • Jones, M.B.: A stereoscanning electron microscope study of the male form ofHemiarthrus abdominalis (Kroyer) (Isopoda: Epicaridea Bopyridae). J. nat. Hist.8, 193–197 (1974)

    Google Scholar 

  • Jones, M.B., Fordy, M.T.: A stereoscanning electron microscope study of the male reproductive characteristics in theJaera albifrons group of species. Mar. Biol.10, 265–271 (1971)

    Google Scholar 

  • Kawaguti, S., Ikemoto, N.: Electron microscopy of the integument structure and its calcification process during moulting in a crayfish. Biol. J. Okayama Univ.8, 43–58 (1962)

    Google Scholar 

  • Kuenen, D.J., Nooteboom, H.P.: Olfactory orientation in some land isopods (Oniscoidea Crustacea). Entomol. Exptl. Biol.23, 379–410 (1963)

    Google Scholar 

  • Kummel, G., Classen, H., Keller, R.: Zur Feinstruktur von Cuticula und Epidermis beim FlubkrebsOrconectes limosus während eines Hautgszyklus. Z. Zellforsch. mikrosk. Anat.109, 517–551 (1970)

    Google Scholar 

  • Lane, D.J.W., Nott, J.A.: A study of the morphology, structure and histochemistry of the foot of the pediveliger ofMytilus edulis L. J. mar. biol. Ass. U.K.55, 477–495 (1975)

    Google Scholar 

  • Laverack, M.S.: External proprioceptors. In: Structure and function of proprioceptors in the Invertebrates, (Mill, P.J., ed.) London: Chapman and Hall ed. (1976)

    Google Scholar 

  • Lindqvist, O.V.: Water regulation in terrestrial isopods with comments on their behaviour in a stimulus gradient. Am. Zool. Fenn.5, 279–311 (1968)

    Google Scholar 

  • Locke, M.: The structure of an epidermal cell during the development of the protein epicuticle and the uptake of molting fluid in an insect. J. Morph.127, 7–40 (1969)

    Google Scholar 

  • Mill, P.J., Lowe, D.A.: Transduction processes of movement and position sensitive cells in a crustacean limb proprioceptor. Nature, Lond.229, 206–208 (1971)

    Google Scholar 

  • Moran, D.T., Rowley, J.C., Zill, S.N., Varela, F.G.: The mechanism of sensory transduction in a mechanoreceptor. Functional stages in campaniform sensilla during the molting cycle. J. Cell Biol.71, 832–847 (1976)

    Google Scholar 

  • Neville, A.C.: Biology of the Arthropod cuticle. Berlin-Heidelberg-New York: Springer-Verlag 1975

    Google Scholar 

  • Pielou, D.P.: The humidity behaviour of the meal worm beetleTenebrio molitor. II. The humidity receptors. J. exp. Biol.17, 295–306 (1940)

    Google Scholar 

  • Price, J.B.: Studies on the blood and cuticle of woodlice. Ph. D. thesis. University of Nottingham (1978)

  • Richards, A.G.: The Integument of Arthropods. University of Minesota Press, Mineapolis (1951)

    Google Scholar 

  • Ross, K.F.A., Jans, D.E.: Woodlice carry their own hygrometers? New Scientist21, 394 (1964)

    Google Scholar 

  • Schmalfuss, H.: Morphologia, Function und Evolution der Terithöcker bei Landisopoden (Oniscoidea, Isopoda, Crustacea). Z. Morph. Tiere80, 287–316 (1975)

    Google Scholar 

  • Schmalfuss, H.: Morphologie und Funktion der tergalen Längsrippen bei Landisopoden (Onisoidea, Isopoda, Crustacea). Zoomorphologie86, 155–167 (1977)

    Google Scholar 

  • Schmalfuss, H.: Morphology and function of cuticular micro-scales and corresponding structures in terrestrial isopods (Crust., Isop., Oniscoidea). Zoomorphologie91, 263–274 (1978)

    Google Scholar 

  • Skinner, D.M., Graham, D.E.: Loss of limbs as a stimulus to ecdysis in Brachyura (true crabs). Biol. Bull.143, 222–233 (1972)

    Google Scholar 

  • Slifer, E.H.: The structure of arthropod chemoreceptors. Ann. Rev. Ent.15, 121–142 (1970)

    Google Scholar 

  • Steinbrecht, R.A., Muller, B.: Fine structure of the antennal receptors of the bed bugCimex lectularius L. Tissue and Cell8, 615–636 (1976)

    Google Scholar 

  • Sutton, S.L.: The study of woodlice. Ginn and Co. Ltd., London (1972)

    Google Scholar 

  • Tait, J.: Experiments and observations on Crustacea. Proc. R. Soc. Edinburgh37, 50–94 (1917)

    Google Scholar 

  • Waldow, V.: Elektrophysiologische Untersuchungen an Feuchte-, Trocken und Kältere Zeptoren auf der Antenne der WanderheuschreckeLocusta. Z. vergl. Physiol.69, 249–283 (1970)

    Google Scholar 

  • Warburg, M.R.: Behavioural adaptations of terrestrial isopods. Am. Zool.8, 545–560 (1968)

    Google Scholar 

  • Yokohari, F., Tateda, H.: Moist and dry hygroreceptors for relative humidity of the cockroachPeriplaneta americana L. J. comp. Physiol.106, 137–152 (1976)

    Google Scholar 

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  1. Department of Zoology, The University, NG7 2RD, Nottingham, England

    J. B. Price & D. M. Holdich

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  1. J. B. Price
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  2. D. M. Holdich
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Price, J.B., Holdich, D.M. The formation of the epicuticle and associated structures inOniscus asellus (Crustacea, Isopoda). Zoomorphologie 94, 321–332 (1980). https://doi.org/10.1007/BF00998208

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