Abstract
The integument of living lophophorates, which here includes all temporary and permanent covers secreted by a bounding “outer epithelium”, has not been studied in a comprehensively systematic way. Despite the cosmopolitan, if modest, distribution of all three lophophorate phyla, the secretory processes giving rise to their integuments are known for no more than a score or so species of Brachiopoda and Bryozoa (or Ectoprocta) and can only be inferred for the Phoronida. Indeed, the mineral parts of the exoskeletons of extinct brachio-pods and bryozoans have probably been more widely studied than those of living species. Yet all known fossilized integuments can be interpreted in terms of present-day secretory regimes which are, therefore, assumed to have operated in much the same way since the emergence of both phyla in early Phanerozoic times. This assumption underlies any observation made on the shell structure of fossil brachiopods and bryozoans. It does not hold for the phoronids which occur sporadically in post-Silurian rocks only as trace fossils.
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References
Emig CC (1982) The biology of Phoronida. Adv Mar Biol 19:1–89
Jaanusson V (1966) Fossil brachiopods with probable aragonitic shell. Geol Foeren Foerhandl 88:279–281
MacKinnon DI (1971) Perforate canopies to canals in the shells of fossil Brachiopoda. Lethaia 4:321–325
Owen G, Williams A (1969) The caecum of articulate Brachiopoda. Proc R Soc Lond [Biol] 172:187–201
Pourreau C (1979) Morphology, distribution and role of the epidermal gland cells in Phoronis psammophila Cori. Tethys 9:133–136
Söderqvist T (1968) Observations on extracellular body wall structures in Crista eburnea. Atti Soc Ital Sci Nat 108:115–118
Tavener-Smith R, Williams A (1970) Structure of the compensation sac in two ascophoran bryozoans. Proc R Soc Lond [Biol] 175:235–254
Tavener-Smith R, Williams A (1972) The secretion and structure of the skeleton of living and fossil Bryozoa. Philos Trans R Soc Lond 264:97–159
Williams A (1968) Significance of the structure of the brachiopod periostracum. Nature 218:551–554
Williams A (1970) Origin of laminar-shelled articulate brachiopods. Lethaia 3:329–342
Williams A (1973) The secretion and structural evolution of the shell of thecideidine brachiopods. Philos Trans R Soc Lond [Biol] 264:439–478
Williams A, Mackay S (1979) Differentiation of the brachiopod periostracum. Palaeontology 22:721–736
Williams A, Wright AD (1970) Shell structure of the Craniacea and other calcareous inarticulate Brachiopoda. Palaeontol Spec Pap 7:1–51
Williams A, Rowell AJ, Muir-Wood HM, Pitrat CW, Schmidt H, Stehli FG, Ager DV, Wright AD, Elliott GF, Amsden TW, Rudwick MJS, Hatai K, Biernat G, McLaren DJ, Boucot A, Johnson JG, Staton RD, Grant RE, Jope HM (1965) In: Moore RC (ed) Treatise on invertebratopaleontology. Brachiopoda. Lawrence Univ, Kansas, pp 1–927
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© 1984 Springer-Verlag Berlin Heidelberg
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Williams, A. (1984). Lophophorates. In: Bereiter-Hahn, J., Matoltsy, A.G., Richards, K.S. (eds) Biology of the Integument. Springer, Berlin, Heidelberg. https://doi.org/10.1007/978-3-642-51593-4_39
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DOI: https://doi.org/10.1007/978-3-642-51593-4_39
Publisher Name: Springer, Berlin, Heidelberg
Print ISBN: 978-3-642-51595-8
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