Abstract
Opal teeth of calanoid copepods develop early in the premolt phase of the molt cycle. They form in the apolysis space beneath the old tooth row on the mandibular gnathobase. We examined stages of tooth formation inNeocalanus spp. andCalanus pacificus. Apolysis occurs early in the distal gnathobase, then several epidermal cell types participate sequentially in formation of new teeth. Fibrous molds in the shapes of the new teeth are extruded onto the epidermal surface, then additional materials, probably proteinaceous, are secreted into them. Tooth molds next are linked to a gland in the proximal part of the gnathobase by ducts of an unusual type, “lamellar-walled ducts.” Silicification follows, apparently using highly osmiophilic material supplied by the proximal gland. Opal is laid down at the outer periphery of the mold then thickens toward the attachment of the mold to newly formed chitin at its base. During apolysis the epidermal cells move proximally without breaking ducts that connect small dermal glands with pores in the sides of the opal teeth. The molds for the new teeth form surrounding these ducts, and new pores result. The glands are like the ciliary exocrine glands seen in other Crustacea, with the duct deriving from fusion of the axonemes of a cilium. Presumably the glands secrete a substance into food newly broken by the teeth. This could be a toxin or a digestive enzyme.
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Literature cited
Anderson, O. R. (1983). Radiolaria. Springer Verlag, New York
Beklemishev, K. V. (1954). The discovery of siliceous formations in the epidermis of lower Crustacea. Dokl. Akad. Nauk SSSR 97: 543–545
Beklemishev, K. B. (1959). On the anatomy of masticatory organs of Copepoda. Report 2: The masticatory edge in mandibles of certain species of Calanidae and Eucalanidae. Trudy Inst. Okeanol. 30: 148–155
Bocquet-Vendrine, J. (1979). La croissance tegumentaire et ses rapports avec la mue chezCrinoniscus equitans (crustace isopode cryptoniscien). Archs Zool. exp. gén. 120: 45–64
Cahoon, L. B. (1982). The use of mucus in feeding by the copepodEuchirella venusta Giesbrecht. Crustaceana 43: 202–204
Degens, E. T. (1976). Molecular mechanisms of carbonate, phosphate, and silica deposition in the living cell. Topics curr. Chem. (Inorg. Geochem.) 64: 1–112
Dickinson, R. G., O'Hagan, J. E., Schotz, M., Binnington, K. C., Hegarty, M. P. (1976). Prostaglandin in the saliva of the cattle tickBoophilus microplus. Aust. J. exp. Biol. med. Sci. 54: 475–486
Doughtie, D. G., Ranga Rao, K. (1979). Ultrastructure of an exocrine dermal gland in the gills of the grass shrimp,Palaemonetes pugio: occurrence of transitory ciliary axonemes associated with the sloughing and reformation of the ductule. J. Morph. 161: 281–307 (Doughtie misspelled “Dtughtie” in paper byline)
Drach, P., Tchernigovtzeff, C. (1967). Sur la methode de determination des stades d'intermue et son application generale aux crustaces. Vie Milieu 18: 595–607
Elwood, W., Bernstein, M. (1968). The ultrastructure of the enamel organ related to enamel formation. Am. J. Anat. 122: 73–94
Garrone, R. (1968). Collagene, spongine et squelette mineral chez l'epongeHaliclona rosea (O.S.) (Desmosponge, Haploscleride). J. Microscopie 8: 581–598
Grime, G. W., Watt, F., Mann, S., Perry, C. C., Webb, J., Williams, R. J. P. (1985). Biological applications of the Oxford scanning proton microprobe. Trends biochem. Sciences 10: 6–10
Hecky, R. E., Mopper, K., Kilham, P., Degens, E. T. (1973). The amino acid and sugar composition of diatom cell-walls. Mar. Biol. 19: 323–331
Hem, J. D. (1972). Chemistry and occurrence of cadmium and zinc in surface water and groundwater. Wat. Resour. Res. 8: 661–679
Higgs, G. A., Vane, J. R., Hart, R. J., Potter, C., Wilson, R. G. (1976). Prostaglandins in the saliva of the cattle tick,Boophilus microplus (Caststrini) (Acarina, Ixodidae). Bull. ent. Res. 66: 665–670
Ishay, J. (1972). Kinin-like substances in saliva of larvae of wasps and hornets. J. Pharm. Pharmac. 24: 747–748
Kerth, K. (1983). Radulaapparat und Radulabildung der Mollusken. II. Zahnbildung, Abbau und Radulawachstum. Zool. Jb. (Abt. Anat. Ont. Tiere) 110: 239–269
Lowenstam, H. A. (1971). Opal precipitation by marine gastropods (Mollusca). Science, N.Y. 171: 487–490
Mann, S., Perry, C. C., Webb, J., Luke, B., Williams, R. J. P. (1986). Structure, morphology, composition, and organization of biogenic minerals in limpet teeth. Proc. R. Soc. (Ser. B) 227: 179–190
Miller, C. B., Huntley, M. E., Brooks, E. R. (1984). Post-collection molting rates of planktonic, marine copepods: measurement, applications, problems. Limnol. Oceanogr. 29: 1274–1289
Miller, C. B., Nelson, D. M., Guillard, R. L., Woodward, B. L. (1980). Effects of media with low silicic acid concentration on tooth formation inAcartia tonsa Dana (Copepoda, Calanoida). Biol. Bull. mar. biol. Lab., Woods Hole 159: 349–363
Miller, C. B., Terazaki, M. (1989). The life histories ofNeocalanus flemingeri andNeocalanus plumchrus in the Sea of Japan. Bull. Plankton Soc. Japan 36: 27–41
Mykles, D. L. (1980). The mechanism of fluid absorption at ecdysis in the American lobster. J. exp. Biol 84: 89–101
Runham, N. W., Thornton, P. R., Shaw, D. A., Wayte, R. C. (1969). The mineralization and hardness of the radular teeth of the limpetPatella vulgata L. Z. Zellforsch. 99: 608–626
Shemesh, M., Hadani, A., Shklar, A., Shore, L. S., Meleguir, F. (1979). Prostaglandins in the salivary glands and reproductive organs ofHyalomma anatolicum excavatum Koch (Acari: Ixodidae). Bull. ent. Res. 69: 381–385
Shore, R. E. (1972). Axial filament of siliceous sponge spicules, its organic components and synthesis. Biol. Bull. mar. biol. Lab., Woods Hole 143: 689–698
Simpson, T. L. (1984). The cell biology of sponges. Springer Verlag, New York
Skinner, D. M. (1985). Molting and regeneration. In: Bliss, D. E., Mantel, L. H. (eds.) The biology of Crustacea. Vol. 9. Integument, pigments, and hormonal processes. Academic Press, New York, p. 43–146
Sreng, L., Quennedy, A. (1976). Role of a temporary ciliary structure in the morphogenesis of insect glands. J. Ultrastruct. Res. 56: 78–95
Sullivan, B. K., Miller, C. B., Peterson, W. T., Soeldner, A. H. (1975). A scanning electron microscope study of the mandibular morphology of boreal copepods. Mar. Biol 30: 175–182
Sullivan, C. W., Volcani, B. E. (1981). Silicon in the cellular metabolism of diatoms. In: Simpson, T. L., Volcani, B. E. (eds.) Silicon and siliceous structures in biological systems. Springer Verlag, New York, p. 15–42
Thuesen, E. V., Kogure, K., Hashimoto, K., Nemoto, T. (1988). Poison arrowworms: a tetrodotoxin venom in the marine phylum Chaetognatha. J. exp. mar. Bio. Ecol. 116: 249–259
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Communicated by M. G. Hadfield, Honolulu
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Miller, C.B., Nelson, D.M., Weiss, C. et al. Morphogenesis of opal teeth in calanoid copepods. Mar. Biol. 106, 91–101 (1990). https://doi.org/10.1007/BF02114678
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DOI: https://doi.org/10.1007/BF02114678