Abstract
Developmental characters — including oocyte and yolk cell structure, patterns of cleavage, and modes of gastrulation — are presented and examined in relation to the phylogeny of the Turbellaria. Eggshell granules, which have been demonstrated to occur in the oocytes of entolecithal eggs and the yolk cells of ectolecithal eggs, are compared among species, and their potential value as a taxonomic character is discussed. The quartet 4d spiral cleavage of the entolecithal egg of polyclads is described as reminiscent of the primitive pattern of early development for the Turbellaria. This is compared to duet spiral cleavage of acoels, and possible phylogenetic schemes involving the two types of spiral cleavage are reviewed. The link between the precise spiral cleavage, which characterizes development of most archoophorans, and blastomere separation (Blastomeren-Anarchie), which occurs in several neoophoran orders, is established by the occurrence of quartet 4d spiral cleavage in one neoophoran order, and of both quartet spiral cleavage and Blastomeren-Anarchie in different species of a second neoophoran order. The epibolic gastrulation of polyclads is described as primitive for the Turbellaria because of its similarity to that of other members of the Spiralia. Although no identical process occurs in neoophoran development, the earlier event of formation of the hull membrane in some neoophorans, and the later event of formation of the definitive epidermis in all neoophorans studied are presented as processes of possible homology to the epibolic gastrulation of polyclads. The lack of correspondence between polyclads and neoophorans in the relationship of the definitive body axes to the egg axis is discussed, and an hypothesis is advanced to account for the differences. The phylogenetic relationships indicated by known developmental phenomena differ only slightly from the scheme presented by Karling in 1974.
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References
Apelt, G., 1969. Fortpflanzungsbiologie, Entwicklungszyklen und vergleichende Friihentwicklung acoeler Turbellarien. Mar. Biol. 4: 267–325.
Ax, P., 1961. Verwandtschaftsbeziehungen und Phylogenie der Turbellarien. Ergebn. Biol. 24: 1–68.
Ax, P., 1963. Relationships and phylogeny of the Turbellaria. In E. C. Dougherty (ed.), The Lower Metazoa. U. Calif. Press, Berkeley; Los Angeles: 191–224.
Ball, S. C, 1916. The development of Paravortex gemellipara (Graffilla gemellipara Linton). J. Morph. 27: 453–558.
Boyer, B. C, 1971. Regulative development in a spiralian embryo as shown by cell deletion experiments on the acoel Childia. J. exp. Zool. 176: 97–105.
Boyer, B. C, 1972. Ultrastructural studies of differentiation in the oocyte of the polyclad turbellarian, Prostheceraeus floridanus. J. Morph. 136: 273–295.
Boyer, B. C, 1981. Experimental evidence for the origins of mosaic development in the polyclad Turbellaria. Biol. Bull. 161: 318.
Boyer, B. C, 1985. Experimental evidence for the origin of determinative development in the polyclad Turbellaria. This volume.
Bresslau, E., 1904. Beiträge zur Entwicklungsgeschichte der Turbellarien. I. Die Entwicklung der Rhabdocölen und Al-loiocolen. Z. wiss. Zool. 76: 213–332.
Bunke, D., 1979. Ein Dopa-oxidierendes Ferment in den Schalendrüsen von Microdalyellia fairchildi (Turbellaria, Neorhabdocoela). Zoomorphologie 193: 153–169.
Bunke, D., 1981. Ultrastruktur-Untersuchungen an Vitellocyten von Microdalyellia fairchildi (Turbellaria, Neorhabdocoela). Zoomorphology 99: 71–86.
Bunke, D., 1982. Ultrastruktur-Untersuchungen zur Eischalen-bildung bei Microdalyellia fairchildi (Turbellaria). Zoomorphology 101: 61–70.
Costello, D. P., 1955. Cleavage, blastulation and gastrulation. In B. H. Willier, P. A. Weiss, and V. Hamburger (eds), Analysis of Development. W. B. Saunders, Philadelphia, Pa.: 213–229.
Domenici, L., L. Galleni & V. Gremigni, 1975. Electron microscopical and cytochemical study of egg-shell globules in Notoplana alcinoi (Turbellaria, Polycladida). J. submicr. Cytol. 7: 239–247.
Domenici, L. & V. Gremigni, 1977. Fine structure and functional role of the coverings of the eggs in Mesostoma ehrenbergii (Focke) (Turbellaria, Neorhabdocoela). Zoomorphologie 88: 247–257.
Giesa, S., 1966. Die Embryonalentwicklung von Monocelis fus-ca Oersted (Turbellaria, Proseriata). Z. Morph. Ökol. Tiere 57: 137–230.
Gremigni, V., 1979. An ultrastructural approach to planarian taxonomy. Syst. Zool. 28: 345–355.
Gremigni, V. & L. Domenici, 1974. Electron microscopical and cytochemical study of vitelline cells in the fresh water triclad Dugesia lugubris s.l. Cell Tiss. Res. 150: 261–270.
Gremigni, V. & L. Domenici, 1975. Genesis, composition, and fate of cortical granules in the eggs of Polycelis nigra (Turbellaria, Tricladida). J. Utrastruct. Res. 50: 277–283.
Gremigni, V. & M. Nigro, 1983. An ultrastructural study of oo-genesis in a marine triclad. Tiss. & Cell 15: 405–416.
Henley, C, 1974. Platyhelminthes (Turbellaria). In A. C. Giese & J. S. Pearse (eds), Reproduction of Marine Invertebrates, 1. Academic Press, N.Y.: 267–343.
Hyman, L. H., 1951. The invertebrates, 2. McGraw-Hill, N.Y., 550 pp.
Ishida, S. T, T. Gotoh & W. Teshirogi, 1981. Oogenesis and eggshell formation in polyclads. Rep. Fukaura Mar. Biol. Lab., Hirosaki Univ. 9: 32–48 (in Japanese).
Ishida, S. T. & W. Teshirogi, 1985. Eggshell formation in polyclads (Turbellaria). This volume.
Ivanov-Kasas, O. M., 1959. Entstehung und Evolution der Spiralfurchung. Sowjetwiss. Naturwiss. Beiträge 12: 1267–1279.
Ivanova-Kasas, O. M., 1981. Phylogenetic significance of spiral cleavage. Biol. Morya (Vladivost) 5: 3–14 (in Russian).
Karling, T. G., 1974. On the anatomy and affinities of the tur-bellarian orders. In N. W. Riser & M. P. Morse (eds), Biology of the Turbellaria. McGraw-Hill, N.Y.: 1–16.
Kato, K., 1940. On the development of some Japanese Polyclads. Jap. J. Zool. 8: 537–573.
Kato, K., 1968. Platyhelminthes. In M. Kumé & K. Dan (eds), J. C. Dan (trans.), Invertebrate embryology. NOLIT, Belgrade: 125–143.
Lang, A., 1884. Die Polycladen des Golfes von Neapel. Flora Fauna Golfes von Neapel 11: 1–688.
Newton, W. D., 1970. Gastrulation in the turbellarian Hydroli-max grisea (Platyhelminthes; Plagiostomidae): formation of the epidermal cavity, inversion and epiboly. Biol. Bull. 139: 539–548.
Okada, K., 1968. Annelida. In M. Kumé & K. Dan (eds), J. C. Dan (trans.) Invertebrate embryology. NOLIT, Belgrade: 192–241.
Papi, F., 1953. Beiträge zur Kenntnis der Macrostomiden (Tur-bellarien). Acta zool. fenn. 78: 2–32.
Reisinger, E., I. Cichocki, R. Erlach & T. Szyskowitz, 1974a. On-togenetische Studien an Turbellarien: ein Beitrag zur Evolution der Dotterverarbeitung im ektolecitalen Ei. I. Z. zool. Syst. Evolut.-forsch. 12: 161–195.
Reisinger, E., I. Cichocki, R. Erlach & T. Szyskowitz, 1974b. On-togenetische Studien an Turbellarien: ein Beitrag zur Evolution der Dotterverarbeitung im ektolecithalen Ei. II. Z. zool. Syst. Evolut.-forsch. 12: 241–278.
Rieger, R. M., 1981. Morphology of the Turbellaria at the ultra-structural level. Hydrobiologia 84: 213–229.
Rieger, R. M. & W. Sterrer, 1975a. New spicular skeletons in Turbellaria and the occurrence of spicules in marine meiofauna, I. Z. zool. Syst. Evolut.-forsch. 13: 207–248.
Rieger, R. M. & W. Sterrer, 1975b. New spicular skeletons in Turbellaria and the occurrence of spicules in marine meiofauna, II. Z. zool. Syst. Evolut.-forsch. 13: 249–278.
Schmidt, G. A., 1966. Evolutionäre Ontogenie der Tiere. Akademie-Verlag, Berlin, 364 pp.
Seilern-Aspang, F., 1957. Die Entwicklung von Macrostomum appendiculatum (Fabricius). Zool. Jb. Anat. 76: 311–330.
Siewing, R., 1980. Das Archicoelomatenkonzept. Zool. Jb. Anat. 103: 439–482.
Smyth, J. D. & J. A. Clegg, 1959. Egg-shell formation in trema-todes and cestodes. Exp. Parasit. 8: 286–323.
Surface, F. M., 1907. The early development of a polyclad, Planocera inquilina. Proc. Acad. nat. Sci. Philad. 59: 514–559.
Hofsten, N., 1912. Eischale und Dotterzellen bei Turbellarien und Trematoden. Zool. Anz. 39: 111–136.
v. Salvini-Plawen, L., 1978. On the origin and evolution of the lower Metazoa. Z. zool. Syst. Evolut.-forsch. 16: 40–87.
Wilson, E. B., 1892. The cell-lineage of Nereis. J. Morph. 6: 361–480.
Yanagita, Y. & T. S. Yamamoto, 1981. Formation and chemical property of the cocoon in a freshwater planarian Den-drocoelopsis ezensis Ichikawa et Okugawa (Turbellaria, Tricladida). Zool. Anz. 207: 130–142.
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© 1986 Dr W. Junk Publishers, Dordrecht
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Thomas, M.B. (1986). Embryology of the Turbellaria and its phylogenetic significance. In: Tyler, S. (eds) Advances in the Biology of Turbellarians and Related Platyhelminthes. Developments in Hydrobiology, vol 32. Springer, Dordrecht. https://doi.org/10.1007/978-94-009-4810-5_15
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DOI: https://doi.org/10.1007/978-94-009-4810-5_15
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