Summary
Rhabdopleura has an overwintering stage that consists of two layers of cells surrounding a central yolk mass. This cellular part is surrounded by a thick electron dense capsule which is secreted by the bud itself. The capsule is probably impervious and protective to its contents.
Blood vessels join the buds to the zooids of the colony. They form the probable route of transfer of yolk from the zooids to the dormant bud.
The capsule of the dormant bud has some structural features in common with the black stolon of the adult zooids. The black stolon is probably formed in a manner similar to that which made the fusellar fabric of the periderm of fossil graptolities.
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References
Dilly, P. N.: The nerve fibres in the basement membrane and related structures in Saccoglossus horsti (Enteropneusta). Z. Zellforsoh. 97, 69–83 (1969)
Dilly, P. N.: Keratin-like fibres in the hemiohordate Rhabdopleura compacta. Z. Zellforsch. 117, 502–515 (1971)
Dilly, P. N.: The structure of the tentacles of Rhabdopleura compacta (Hemichordata) with special reference to neurociliary control. Z. Zellforsch. 129, 20–39 (1972)
Dilly, P. N.: The larva of Rhabdopleura compacta (Hemichordata). Marine Biol. 18, 69–86 (1973)
Kulicki, C.: New observations on Rhabdopleura kozlowski (Pterobranchial) from the bathonian of Poland. Acta palaeontologica polonica 16, 415–428 (1971)
Lankester, E. R.: A contribution to the knowledge of Rhabdopleura. Quart. J. micr. Sci. 24, 622–647 (1884)
Schepotieff, A.: Die Anatomie von Rhabdopleura. Zool. Jb. Abt. Anat. u. Ontolog. Tiere 23, 463–534 (1907a)
Schepotieff, A.: Knospungsprozeß und Gehäuse von Rhabdopleura. Zool. Jb. Abt. Anat. u. Ontolog. Tiere 24, 193–238 (1907b)
Southwood, E.: The phylogenetic position of the pogonophora. Symp. Zool. Soc. on Protochordates. (In press) (1974)
Stebbing, A. R. D.: The status and ecology of Rhabdopleura compacta (Hemichordata), from Plymouth. J. mar. biol. Ass. U.K. 50, 209–221 (1970a)
Stebbing, A. R. D.: Aspects of the reproduction and life cycle of Rhabdopleura compacta (Hemichordata). Marine Biol. 5, 205–212 (1970b)
Towe, K. M., Urbanek, A.: Collagen-like structures in ordovician graptolite periderm. Nature (Lond.) 237, 433–445 (1972)
Urbanek, A., Towe, K. M.: Ultrastructural studies on graptolites. 1. The periderm and its derivatives in the dendroidea and in Mastigograptus. Smithsonian Contr. Paleobiol. 20 (1974)
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I wish to thank Professor J. Z. Young FRS for continued advice and encouragement throughout my studies. Drs. Eve Southwood and A.R.D. Stebbing together with the staff of the Marine Biological Association's Laboratory at Plymouth gave freely of their time and expertise in obtaining the specimens for me. Mr. R. Moss and Miss D. Bailey gave much technical and photographic assistance. Miss P. Stephens skillfully produced the histological preparations.
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Dilly, P.N. The dormant buds of Rhabdopleura compacta (Hemichordata). Cell Tissue Res. 159, 387–397 (1975). https://doi.org/10.1007/BF00221785
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DOI: https://doi.org/10.1007/BF00221785