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Growth in encrusting cheilostome bryozoans: I. Evolutionary trends

Published online by Cambridge University Press:  08 April 2016

Scott Lidgard  and
Jeremy B. C. Jackson
Scott Lidgard
Affiliation:
Department of Geology, Field Museum of Natural History, Chicago, Illinois 60605
Jeremy B. C. Jackson
Affiliation:
Smithsonian Tropical Research Institute, Apartado 2072, Balboa, Republic of Panama
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Abstract

Growth of the colony is a basic element of morphological evolution and life history in cheilostome bryozoans. Here we consider the occurrence of different modes of growth in encrusting cheilostomes through geologic time and in well-studied living associations. We assess patterns of zooid formation by direct examination of skeletal characters in species from nearly all diverse fossil assemblages reported from North America and quantify within-assemblage diversities and abundance rankings for fossil encrusting species with different modes of growth. These data document macroevolutionary trends showing a transition from dominance of an apparently primitive mode of budding in the Early Cretaceous to derived modes through the Tertiary. The trends are characterized by their long duration and apparent convergence among systematic subgroups within the Cheilostomata. We then consider the validity of our observations as adaptive trends. Patterns of ecological dominance among living and fossil species indicate that different patterns of zooid formation are important determinants of success of colonies as reflected by their abundance, competitive ability, survivorship, and recovery from injury or predation. The consistency of the long-term trends and evidence for the existence of ecological mechanisms in fossil assemblages suggest a major evolutionary role for biotic interactions.

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Articles
Information
Paleobiology , Volume 15 , Issue 3 , Summer 1989 , pp. 255 - 282
Copyright
Copyright © The Paleontological Society 

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References

Literature Cited

Abbott, M. B. 1973. Seasonal diversity and density in bryozoan populations of Block Island Sound (New York, U.S.A.). Pp. 37–51. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press; London.Google Scholar
Alvarez, F., and Taylor, P. D. 1987. Epizoan ecology and interactions in the Devonian of Spain. Palaeogeography, Palaeoclimatology, Palaeoecology 61:17–31.CrossRefGoogle Scholar
Anstey, R. L. 1987. Astogeny and phylogeny: evolutionary heterochrony in Paleozoic bryozoans. Paleobiology 13:20–43.CrossRefGoogle Scholar
Bambach, R. K. 1977. Species richness in marine benthic habitats through the Phanerozoic. Paleobiology 3:152–167.Google Scholar
Banta, W. C. 1968. The body wall of cheilostome Bryozoa, I. The ectocyst of Watersipora nigra (Canu and Bassler). Journal of Morphology 125:497–508.CrossRefGoogle ScholarPubMed
Banta, W. C. 1969. The body wall of Cheilostome Bryozoa, II. Interzooidal communication organs. Journal of Morphology 129:149–170.Google Scholar
Banta, W. C. 1972. The body wall of Cheilostome Bryozoa, V. Frontal budding in Schizoporella unicornis floridana. Marine Biology 14:63–71.Google Scholar
Banta, W. C. 1973. The significance of areolae in Cheilostome Bryozoa. Pp. 209–220. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press; London.Google Scholar
Banta, W. C. 1975. Origin and early evolution of Cheilostome Bryozoa. Documents des Laboratoires de Géologie des Sciences de Lyon 3:565–582.Google Scholar
Berggren, W. A., Kent, D. V., and Flynn, J. J. 1985. Jurassic to Paleogene: Part 2. Paleogene geochronology and chronostratigraphy. Pp. 141–195. In Snelling, N. J. (ed.), The Chronology of the Geological Record. The Geological Society Memoir 10.Google Scholar
Bernstein, B. B., and Jung, N. 1979. Selective pressures and coevolution in a kelp canopy community in southern California. Ecological Monographs 49:335–355.Google Scholar
Best, B. A., and Winston, J. E. 1984. Skeletal strength of encrusting cheilostome bryozoans. Biological Bulletin 167:390–409.CrossRefGoogle ScholarPubMed
Best, M. A., and Thorpe, J. P. 1985. Autoradiographic study of feeding and colonial transport of metabolites in the marine bryozoan Membranipora membranaceae. Marine Biology 84:295–300.Google Scholar
Boardman, R. S., and Cheetham, A. H. 1969. Skeletal growth, intracolony variation, and evolution in Bryozoa: a review. Journal of Paleontology 43:205–233.Google Scholar
Boardman, R.S., and Cheetham, A. H. 1973. Degrees of colony dominance in stenolaemate and gymnolaemate Bryozoa. Pp. 121–220. In Boardman, R. S., Cheetham, A. H., and Oliver, W. A. Jr. (eds.) (q.v.).Google Scholar
Boardman, R. S., Cheetham, A. H., and Oliver, W. S. Jr. (eds.). 1973. Animal Colonies. Dowden, Hutchinson, and Ross; Stroudsburg, Pennsylvania.Google Scholar
Bobin, G. 1977. Interzooecial communications and the funicular system. Pp. 307–333. In Woollacott, R. M., and Zimmer, R. S. (eds.), Biology of Bryozoans. Academic Press; New York.Google Scholar
Bottjer, D. J., and Jablonski, D. 1989. Paleoenvironmental patterns in the evolution of post-Paleozoic benthic marine invertebrates. Palaios 3:240–260.Google Scholar
Braem, F. 1914. Die Knospung von Paludicella. Vorläufige Mitteilung. Archiv für Hydrobiologie und Planktonkunde 9:527–556.Google Scholar
Buss, L. W. 1981. Mechanisms of competition between Onychocella alula (Hastings) and Antropora tincta (Hastings) on an Eastern Pacific rocky shoreline. Pp. 37–49. In Larwood, G. P., and Nielsen, C. (eds.), Recent and Fossil Bryozoa. Olsen and Olsen; Fredensborg, Denmark.Google Scholar
Buss, L. W. 1987. The Evolution of Individuality. Princeton University Press; Princeton, New Jersey.Google Scholar
Cancino, J. M. 1986. Marine macroalgae as a substratum for sessile invertebrates: a study of Celleporella hyalina (Bryozoa) on fronds of Laminaria saccharina (Phaeophyta). Monografias Biologicas 4:279–308.Google Scholar
Canu, F., and Bassler, R. S. 1919. Fossil Bryozoa from the West Indies. Carnegie Institution of Washington 291:73–102.Google Scholar
Canu, F., and Bassler, R. S. 1920. North American Early Tertiary Bryozoa. United States National Museum Bulletin 106.Google Scholar
Canu, F., and Bassler, R. S. 1923. North American Later Tertiary and Quaternary Bryozoa. United States National Museum Bulletin 125.Google Scholar
Canu, F., and Bassler, R. S. 1926. The fauna of the Ripley Formation on Coon Creek, Tennessee: Molluscoidea. United States Geological Survey Professional Paper 137:32–38.Google Scholar
Canu, F., and Bassler, R. S. 1928. Fossil and Recent Bryozoa of the Gulf of Mexico region. United States National Museum Bulletin 165.Google Scholar
Canu, F., and Bassler, R. S. 1933. The bryozoan fauna of the Vincentown Limesand. United States National Museum Bulletin 165.Google Scholar
Carle, K. S., and Ruppert, E. E. 1983. Comparative ultrastructure of the bryozoan funiculus: a blood vessel homologue. Zeitschrift für Zoologische Systematik und Evolutionsforschung 21:181–193.CrossRefGoogle Scholar
Cheetham, A. H. 1963. Late Eocene zoogeography of the Eastern Gulf Coast Region. Geological Society of America Memoirs 91:1–119.Google Scholar
Cheetham, A. H. 1971. Functional morphology and biofacies distribution of Cheilostome Bryozoa in the Danian Stage (Paleocene) of southern Scandinavia. Smithsonian Contributions to Paleobiology 6.Google Scholar
Cheetham, A. H. 1975. Taxonomic significance of autozooid size and shape in some early multiserial cheilostomes from the Gulf Coast of the U.S.A. Documents des Laboratories de Géologie des Sciences de Lyon 3:547–564.Google Scholar
Cheetham, A. H. 1977. Notes on Vincentown Bryozoa. Cenozoic Field Trip Guide. Fourth Conference of the International Bryozoology Association; Woods Hole, Massachusetts.Google Scholar
Cheetham, A. H., and Cook, P. L. 1983. General feature of the class Gymnolaemata. Pp. 49–137. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G, Bryozoa, revised. University of Kansas and Geological Society of America; Lawrence, Kansas, and Boulder, Colorado.Google Scholar
Cheetham, A. H., and Sandberg, P. A. 1964. Quaternary Bryozoa from Louisiana mudlumps. Journal of Paleontology 38:1013–1046.Google Scholar
Coates, A. G., and Jackson, J. B. C. 1985. Morphological themes in the evolution of clonal and aclonal marine invertebrates. Pp. 67–106. In Jackson, J. B. C., Buss, L. W., and Cook, R. E. (eds.) (q.v.).Google Scholar
Colman, J. 1940. On the faunas inhabiting intertidal seaweeds. Journal of the Marine Biological Association of the United Kingdom 24:129–183.Google Scholar
Connell, J. H., and Keough, M. J. 1985. Disturbance and patch dynamics of subtidal marine animals on hard substrata. Pp. 125–151. In Pickett, S. T. A., and White, P. S. (eds.), The Ecology of Natural Disturbance and Patch Dynamics. Academic Press; New York.Google Scholar
Cook, P. L. 1977. The genus Tremogasterina Canu (Bryozoa, Cheilostomata). Bulletin of the British Museum of Natural History (Zoology) 35:103–165.Google Scholar
Cook, P. L. 1987. Bryozoa from Ghana—a preliminary survey. Annales. Musée Royal de l'Afrique Centrale 8:1–315.Google Scholar
Cook, P. L., and Chimonides, P. J. 1981. Morphology and systematics of some interior-walled Cheilostome Bryozoa. Bulletin of the British Museum of Natural History (Zoology) 41:53–89.Google Scholar
Cook, P. L., and Hayward, P. J. 1983. Notes on the family Lekythoporidae (Bryozoa, Cheilostomata). Bulletin of the British Museum of Natural History (Zoology) 45:55–76.Google Scholar
Crowley, T. J. 1983. The geologic record of climatic change. Reviews of Geophysics and Space Physics 21:828–877.Google Scholar
Culver, S. J., Buzas, M. A., and Collins, L. S. 1987. On the value of taxonomic standardization in evolutionary studies. Paleobiology 13:169–176.CrossRefGoogle Scholar
Cummings, S. G. 1975. Zooid regression in Schizoporella unicornis floridana (Bryozoa, Cheilostomata). Chesapeake Science 16:93–103.CrossRefGoogle Scholar
Dick, M. H., and Ross, J. R. P. 1986. Intertidal cheilostome bryozoans in rock-pile habitat at Narrow Strait, Kodiak, Alaska. Pp. 87–93. In Nielsen, C., and Larwood, G. P. (eds.), Bryozoa: Ordovician to Recent. Olsen and Olsen; Fredensborg, Denmark.Google Scholar
Driscoll, E. G. 1968. Sublittoral attached epifaunal development in Buzzards Bay, Massachusetts. Hydrobiologia 32:27–32.Google Scholar
Dzik, J. 1975. The origin and early phylogeny of the cheilostomatous Bryozoa. Acta Palaeontologica Polonica 20:395–423.Google Scholar
Eggleston, D. 1972. Factors influencing the distribution of sublittoral ectoprocts off the south of the Isle of Man (Irish Sea). Journal of Natural History 6:247–260.Google Scholar
Fresi, E., Chimenz, C., and Marchio, G. 1982. Zonazione di briozoi ed epifiti in una prateria di Posidonia oceanica (L.) delile. II Naturalista siciliano, Serie IV 6:499–508.Google Scholar
Fürsich, F. T. 1978. The influence of faunal condensation and mixing on the preservation of fossil benthic communities. Lethaia 11:243–250.Google Scholar
Gautier, Y. V. 1959. Essai d'étude quantitative sur les bryozoaires d'un fond coralligéne a Gorgones. Recueil des Travaux de la Station Marine d'Endoume 26:137–142.Google Scholar
Gleason, M. G., and Jackson, J. B. C.In preparation. Ecology of cryptic coral reef communities V. Abundance, distribution, and recruitment of encrusting organisms on insular substrata at Los Roques, Venezuela.Google Scholar
Gordon, D. P. 1971a. Colony formation in the cheilostomatous bryozoan Fenestrulina malusii var. thyreophora. New Zealand Journal of Marine and Freshwater Research 5:342–351.Google Scholar
Gordon, D. P. 1971b. Zooidal budding in the cheilostomatous bryozoan Fenestrulina malusii var. thyreophora. New Zealand Journal of Marine and Freshwater Research 5:453–460.Google Scholar
Gordon, D. P. 1972. Biological relationships of an intertidal bryozoan population. Journal of Natural History 6:503–514.Google Scholar
Gordon, D. P. 1984. The marine fauna of New Zealand: Bryozoa: Gymnolaemata from the Kermadec Ridge. New Zealand Oceanographic Institute Memoir 91.Google Scholar
Gordon, D. P., and Hastings, A. B. 1979. The interzooidal communications of Hippothoa sensu lato (Bryozoa) and their value in classification. Journal of Natural History 13:561–569.Google Scholar
Gould, S. J. 1988. Trends as changes in variance: a new slant on progress and directionality in evolution. Journal of Paleontology 62:319–329.Google Scholar
Gulliksen, B. 1980. The macrobenthic rocky-bottom fauna of Borgenfjorden, North-Tröndelag, Norway. Sarsia 65:115–136.Google Scholar
Gulliksen, B., Haug, T., and Sandness, O. K. 1980. Benthic macrofauna on new and old lava rounds at Jan Mayen. Sarsia 65:137–148.Google Scholar
Gustafson, J. P., Stebbing, G. L., and Ayala, F. J. (eds.). 1986. Genetics, Development, and Evolution. Plenum Press; New York.Google Scholar
Hakansson, E., and Winston, J. E. 1985. Interstitial bryozoans: unexpected life forms in a high energy environment. Pp. 125–134. In Nielsen, C., and Larwood, G. P. (eds.), Bryozoa: Ordovician to Recent. Olsen and Olsen; Fredensborg, Denmark.Google Scholar
Hallam, A. (ed.). 1984. Pre-Quaternary sea level changes. Annual Review, Earth and Planetary Sciences 12:205–243.CrossRefGoogle Scholar
Hallam, A., Channell, J. E. T., Hancock, J. M., LeBrecque, J. L., and Lowrie, W. 1985. Jurassic and Cretaceous geochronology and Jurassic to Paleogene magnetostratigraphy. Pp. 118–140. In Snelling, N. J. (ed.), The Chronology of the Geological Record, Geological Society of London Memoir 10.Google Scholar
Harmelin, J. G. 1976. Le sous-ordre des Tubuliporina (Bryozoaires, Cyclostomes) en Méditerranée: écology et systematique. Memoire Institute Oceanography (Monaco) 10.Google Scholar
Harmer, S. F. 1902. On the morphology of the Cheilostomata. Quarterly Journal of Microscopical Science 46:263–350.Google Scholar
Harper, J. L., Rosen, B. R., and White, J. (eds.). 1986. The growth and form of modular organisms. Philosophical Transactions of the Royal Society of London B 313:1–250.Google Scholar
Harvell, C. D. 1986. The ecology and evolution of inducible defenses in a marine bryozoan: cues, costs, and consequences. The American Naturalist 128:810–823.Google Scholar
Hayward, P. J. 1973. Preliminary observations on settlement and growth in populations of Alcyonidium hirsutum (Fleming). Pp. 107–113. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press; London.Google Scholar
Hayward, P. J. 1975. Observations on the bryozoan epiphytes of Posidonia oceanica from the island of Chios (Aegean Sea). Documents du Laboratoire de Géologie de la Faculté des Sciences de Lyon 3:347–356.Google Scholar
Hayward, P. J., and Ryland, J. S. 1975. Growth, reproduction, and larval dispersal in Alcyonidium hirsutum (Fleming) and some other Bryozoa. Pubblicazioni della Stazione Zoologica di Napoli 39:226–241.Google Scholar
Herrera, A. Y. 1985. Pliocene Cheilostomata in the Isthmus of the Tehuantepec Region (Mexico). Pp. 145–151. In Nielsen, C., and Larwood, G. P. (eds.), Bryozoa: Ordovician to Recent. Olsen and Olsen; Fredensborg, Denmark.Google Scholar
Holland, H. D., and Trendall, A. F. (eds.). 1984. Patterns of Change in Earth Evolution. Springer-Verlag; Berlin.Google Scholar
Hondt, J. L.D'. 1984. Bryozoaires épibiontes sur le brachiopode articulé Gryphus vitreus (Born, 1778) en Mer Méditerranée occidentale (Corse). Vie et Milieu 34:27–33.Google Scholar
Hondt, J. L.D'. 1986. État de connaissances sur la parition phylogénétique et l'évolution des Bryozoaires. Bolletino di Zoologia 53:247–269.Google Scholar
Hughes, D. J., and Hughes, R. N. 1986. Metabolic implications of modularity: studies on the respiration and growth of Electra pilosa. Philosophical Transactions of the Royal Society of London B 313:23–29.Google Scholar
Hughes, R. N., and Cancino, J. M. 1985. An ecological overview of cloning in Metazoa. Pp. 153–186. In Jackson, J. B. C., Buss, L. W., and Cook, R. E. (eds.) (q.v.).Google Scholar
Jablonski, D., and Lutz, R. A. 1983. Larval ecology of marine benthic invertebrates: paleobiological implications. Biological Reviews 58:21–99.Google Scholar
Jackson, J. B. C. 1977. Habitat area, colonization, and development of epibenthic community structure. Pp. 349–358. In Keegan, B. F., Ceidigh, P. O., and Boaden, P. J. S. (eds.), Biology of Benthic Organisms. Pergamon Press; New York.Google Scholar
Jackson, J. B. C. 1979a. Morphological strategies of sessile animals. Pp. 499–555. In Larwood, G. P., and Rosen, B. R. (eds.), Biology and Systematics of Colonial Organisms. Academic Press; London.Google Scholar
Jackson, J. B. C. 1979b. Overgrowth competition between encrusting cheilostome ectoprocts in a Jamaican cryptic reef environment. Journal of Animal Ecology 48:805–823.Google Scholar
Jackson, J. B. C. 1981. Competitive interactions between bryozoans and other organisms. Pp. 22–36. In Dutro, J. T., and Boardman, R. S. (eds.), Lophophorates: Notes for a Short Course. University of Tennessee Department of Geological Sciences Studies in Geology 5.Google Scholar
Jackson, J. B. C. 1983. Biological determinants of present and past sessile animal distributions. Pp. 39–120. In Tevesz, M. J. S., and McCall, P. L. (eds.), Biotic Interactions in Recent and Fossil Benthic Communities. Plenum Press; New York.Google Scholar
Jackson, J. B. C. 1984. Ecology of cryptic coral reef communities. III. Abundance and aggregation of encrusting organisms with particular reference to Cheilostome Bryozoa. Journal of Experimental Marine Biology and Ecology 75:37–57.Google Scholar
Jackson, J. B. C. 1985. Distribution and ecology of clonal and aclonal invertebrates. Pp. 297–355. In Jackson, J. B. C., Buss, L. W., and Cook, R. E. (eds.) (q.v.).Google Scholar
Jackson, J. B. C., and Buss, L. W. 1975. Allelopathy and spatial competition among coral reef invertebrates. Proceedings of the National Academy of Sciences, U.S.A. 72:5160–5163.Google Scholar
Jackson, J. B. C., Buss, L. W., and Cook, R. E. (eds.). 1985. Population Biology and Evolution of Clonal Organisms. Yale University Press; New Haven, Connecticut.Google Scholar
Jackson, J. B. C., and Coates, A. G. 1986. Life cycles and evolution of clonal (modular) animals. Philosophical Transactions of the Royal Society of London B 313:7–22.Google Scholar
Jackson, J. B. C., and McKinney, F. K.In press. Ecological processes and progressive macroevolution of marine clonal benthos. In Ross, R., and Allmon, W. (eds.), Biotic and Abiotic Factors in Evolution. University of Chicago Press; Chicago.Google Scholar
Jackson, J. B. C., and Wertheimer, S. 1985. Patterns of reproduction in five common species of Jamaican reef-associated bryozoans. Pp. 161–168. In Nielsen, C., and Larwood, G. P. (eds.), Bryozoa: Ordovician to Recent. Olsen and Olsen; Fredensborg, Denmark.Google Scholar
Jebram, D. 1986. Arguments concerning the basal evolution of the Bryozoa. Zeitschrift für Zoologische Systematik und Evolutionsforschung 24:266–290.Google Scholar
Karlson, R. 1978. Predation and space utilization patterns in a marine epifaunal community. Journal of Experimental Marine Biology and Ecology 31:225–239.Google Scholar
Kay, A. M., and Butler, A. J. 1983. “Stability” of the fouling communities on the pilings of two piers in South Australia. Oecologia 56:70–78.Google Scholar
Kay, A. M., and Keough, M. J. 1981. Occupation of patches in the epifaunal communities on pier pilings and the bivalve Pinna bicolor at Edithburgh, South Australia. Oecologia 48:123–130.Google Scholar
Keough, M. J. 1984a. Effects of patch size on the abundance of sessile marine invertebrates. Ecology 65:423–437.Google Scholar
Keough, M. J. 1984b. Dynamics of the epifauna of the bivalve Pinna bicolor: interactions among recruitment, predation, and competition. Ecology 65:677–688.Google Scholar
Keough, M. J., and Downes, B. J. 1982. Recruitment of marine invertebrates: the role of active larval choices and early mortality. Oecologia 54:348–352.Google Scholar
Kerneïs, A. 1960. Contribution a l'étude faunistique et écologique des herbiers de Posidonies de la region de Banyuls. Vie et Milieu XI:145–186.Google Scholar
Kidwell, S. M. 1986. Models for fossil concentrations: paleobiologic implications. Paleobiology 12:6–24.Google Scholar
Klekowski, E. S. Jr. 1988. Mutation, Development Selection and Plant Evolution. Columbia University Press; New York.Google Scholar
Koch, C. F. 1978. Bias in the published fossil record. Paleobiology 4:367–372.Google Scholar
Koch, C. F. 1987. Prediction of small sample size effects on the measured temporal and geographic distribution patterns of species. Paleobiology 13:100–107.Google Scholar
Koch, C. F., and Sohl, N. F. 1983. Preservational effects in paleoecological studies: Cretaceous mollusc examples. Paleobiology 9:26–34.Google Scholar
Kues, B. S. 1983. Bryozoan and crustacean from Fruitland Fm. (Upper Cretaceous) of New Mexico. New Mexico Geology 5:52–55.Google Scholar
Lagaaij, R. 1959. Some species of Bryozoa new to the Bowden Beds, Jamaica, B.W.I. Micropaleontology 5:482–486.Google Scholar
Lewbel, G. S., Howard, R. L., and Gallaway, B. J. 1987. Zonation of dominant fouling organisms on northern Gulf of Mexico petroleum platforms. Marine Environmental Research 21:199–224.Google Scholar
Liddell, W. D., and Brett, C. C. 1982. Skeletal overgrowths among epizoans from the Silurian (Wenlockion) Waldron Shale. Paleobiology 8:67–78.Google Scholar
Lidgard, S. 1985a. Budding process and geometry in encrusting cheilostome bryozoans. Pp. 135–142. In Nielsen, C., and Larwood, G. P. (eds.), Recent and Fossil Bryozoa. Olsen and Olsen; Fredensborg, Denmark.Google Scholar
Lidgard, S. 1985b. Zooid and colony growth in encrusting cheilostome bryozoans. Palaeontology 28:255–291.Google Scholar
Lidgard, S. 1986. Ontogeny in animal colonies: a persistent trend in the bryozoan fossil record. Science 232:230–232.Google Scholar
Lidgard, S., and Jackson, J. B. C. 1982. How to be an abundant encrusting bryozoan. Geological Society of America Abstracts with Programs 14:547.Google Scholar
Lord, E. M., and Hill, J. P. 1987. Evidence for heterochrony in the evolution of plant form. Pp. 47–70. In Raff, R. A., and Raff, E. C. (eds.), Development as an Evolutionary Process. Alan R. Liss; New York.Google Scholar
Lutaud, G. 1983. Autozooid morphogenesis in Anascan Cheilostomes. Pp. 208–237. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G, Bryozoa, revised. University of Kansas and Geological Society of America; Lawrence, Kansas, and Boulder, Colorado.Google Scholar
Lutaud, G. 1986. The construction and early stages of calcification in the zooidal bud of malacostregans. Pp. 153–160. In Ross, J. R. P. (ed.), Bryozoa: Present and Past. Western Washington University; Bellingham, Washington.Google Scholar
Maturo, F. J. S. 1968. The distributional pattern of the Bryozoa of the east coast of the United States exclusive of New England. Atti della Socieà Italiana di Scienze Naturali 108:261–284.Google Scholar
Maturo, F. J. S. 1973. Offspring variation from known maternal stocks of Parasmittina nitida. Pp. 577–584. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press; New York.Google Scholar
Maynard Smith, J., Burian, R., Kauffman, S., Alberch, P., Campbell, J., Goodwin, B., Lande, R., Raup, D., and Wolpert, L. 1985. Developmental constraints and evolution. The Quarterly Review of Biology 60:265–287.Google Scholar
McDougall, K. D. 1943. Sessile marine invertebrates of Beaufort, North Carolina. Ecological Monographs 13:321–374.Google Scholar
McGuirt, J. H. 1941. Louisiana Tertiary Bryozoa. Department of Conservation, Louisiana Geological Survey, Geological Bulletin 21:1–177.Google Scholar
McKinney, F. K., and Jackson, J. B. C. 1988. Bryozoan Evolution. Unwin Hyman; Winchester, Massachusetts.Google Scholar
McKinney, M. L. (ed.). 1988. Heterochrony in Evolution: A Multidisciplinary Approach. Plenum Press; New York.Google Scholar
Nye, O. B., Dean, D. A., and Hinds, R. W. 1972. Improved thin section techniques for fossil and Recent organisms. Journal of Paleontology 46:271–275.Google Scholar
Osman, R. W. 1977. The establishment and development of a marine epifaunal community. Ecological Monographs 47:37–63.Google Scholar
Palumbi, S. R., and Jackson, J. B. C. 1982. Ecology of cryptic coral reef communities. II. Recovery from small disturbance events by encrusting bryozoa: the influence of “host” species and lesion size. Journal of Experimental Marine Biology and Ecology 64:103–115.Google Scholar
Pohowsky, R. A. 1973. A Jurassic cheilostome from England. Pp. 447–461. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press; London.Google Scholar
Raff, R. A., and Raff, E. C. 1987. Development as an Evolutionary Process. Alan R. Liss; New York.Google Scholar
Raup, D. M. 1972. Taxonomic diversity during the Phanerozoic. Science 177:1065–1071.Google Scholar
Raup, D. M. 1976. Species diversity in the Phanerozoic: a tabulation. Paleobiology 3:279–288.Google Scholar
Ristedt, H., and Schumacher, H. 1985. The bryozoan Rhynchozoon larreyi (Audouin, 1826)—a successful competitor in coral reef communities of the Red Sea. Marine Ecology 6:167–179.Google Scholar
Rubin, J. A. 1982. The degree of intransitivity and its measurement in an assemblage of encrusting cheilostome bryozoa. Journal of Experimental Marine Biology and Ecology 60:119–128.Google Scholar
Russ, G. R. 1980. Effects of predation by fishes, competition, and structural complexity of the substratum on the establishment of a marine epifaunal community. Journal of Experimental Marine Biology and Ecology 42:55–69.Google Scholar
Russ, G. R. 1982. Overgrowth in a marine epifaunal community: competitive hierarchies and competitive networks. Oecologia 53:12–19.Google Scholar
Ryland, J. S. 1970. Bryozoans. Hutchinson University Press; London.Google Scholar
Ryland, J. S. 1975. Parameters of the lophophore in relation to population structure in a bryozoan community. Pp. 363–393. In Barnes, H. (ed.), Proceedings of the Ninth European Marine Biology Symposium. Aberdeen University Press; Aberdeen.Google Scholar
Ryland, J. S. 1976. Physiology and ecology of marine bryozoans. Advances in Marine Biology 14:285–443.Google Scholar
Ryland, J. S. 1982. Bryozoa. Pp. 743–769. In Parker, S. P. (ed.), Synopsis and Classification of Living Organisms. McGraw-Hill; New York.Google Scholar
Sandberg, P. A. 1973. Degree of individuality in cheilostome Bryozoa: skeletal criteria. Pp. 305–315. In Boardman, R. S., Cheetham, A. H., and Oliver, W. A. (eds.) (q.v.).Google Scholar
Sandberg, P. A. 1983. Ultrastructure and skeletal development in cheilostome Bryozoa. Pp. 238–286. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G, Bryozoa, revised. University of Kansas and Geological Society of America; Lawrence, Kansas, and Boulder, Colorado.Google Scholar
Schopf, T. J. M. 1969. Paleoecology of Ectoprocts (Bryozoans). Journal of Paleontology 43:234–244.Google Scholar
Scolaro, R. J. 1968. Paleoecologic interpretation of some Florida Miocene Bryozoa. Preliminary report. Atti della Societa Italiana di Scienze Naturali e Museo Civico di Storia Naturale di Milano 108:174–177.Google Scholar
Seed, R. 1976. Observations on the ecology of Membranipora (Bryozoa) and a major predator, Doridella steinbergae, along the fronds of Laminaria saccharina at Friday Harbor, Washington. Journal of Experimental Marine Biology and Ecology 24:1–17.Google Scholar
Sepkoski, J. J. Jr. 1988. Alpha, beta, or gamma—where does all the diversity go? Paleobiology 14:221–224.Google Scholar
Shaw, N. G. 1967. Cheilostomata from Gulfian (U. Cretaceous) rocks of southwestern Arkansas. Journal of Paleontology 41:1393–1432.Google Scholar
Signor, P. W. III. 1978. Species richness in the Phanerozoic: an investigation of sampling effects. Paleobiology 4:394–406.Google Scholar
Silén, L. 1944. On the formation of the interzooidal communications of the Bryozoa. Zoologica Bidrag fran Uppsala 22:433–488.Google Scholar
Silén, L. 1977. Polymorphism in marine bryozoans. Pp. 184–227. In Woollacott, R. M., and Zimmer, R. L. (eds.), The Biology of Bryozoans. Academic Press; New York.Google Scholar
Silén, L. 1987. Colony growth pattern in Electra pilosa (Linnaeus) and comparable encrusting cheilostome bryozoans. Acta Zoologica (Stockholm) 68:17–34.Google Scholar
Slatkin, M. 1981. A diffusion model of species selection. Paleobiology 7:421–425.Google Scholar
Stanley, S. M. 1973. An explanation for Cope's Rule. Evolution 27:1–26.Google Scholar
Stanley, S. M. 1975. A theory of evolution above the species level. Proceedings of the National Academy of Science 72:646–650.Google Scholar
Stanley, S. M. 1979. Macroevolution: Pattern and Process. W. H. Freeman; San Francisco.Google Scholar
Stebbing, A. R. D. 1971. Growth of Flustra foliacea (Bryozoa). Marine Biology 9:267–273.Google Scholar
Stebbing, A. R. D. 1973. Observations on colony overgrowth and spatial competition. Pp. 173–183. In Larwood, G. P. (ed.), Living and Fossil Bryozoa. Academic Press; London.Google Scholar
Steneck, R. S. 1986. The ecology of coralline algal crusts: convergent patterns and adaptive strategies. Annual Review of Ecology and Systematics 17:273–303.CrossRefGoogle Scholar
Sutherland, J. P., and Karlson, R. H. 1977. Development and stability of the fouling community at Beaufort, North Carolina. Ecological Monographs 47:425–446.Google Scholar
Taylor, P. D. 1979a. Functional significance of contrasting colony form in two Mesozoic encrusting bryozoans. Palaeogeography, Palaeoclimatology, Palaeoecology 26:151–158.Google Scholar
Taylor, P. D. 1979b. Palaeoecology of the encrusting epifauna of some British Jurassic bivalves. Palaeogeography, Palaeoclimatology, Palaeoecology 28:241–262.Google Scholar
Taylor, P. D. 1981. Bryozoa from the Jurassic Portland beds of England. Palaeontology 24:863–875.Google Scholar
Taylor, P. D. 1982. Probable predatory borings in late Cretaceous bryozoans. Lethaia 15:68–74.Google Scholar
Taylor, P. D. 1984. Adaptations for spatial competition and utilizaton in Silurian encrusting bryozoans. Special Papers in Palaeontology 32:197–210.Google Scholar
Taylor, P. D. 1986. Charixa Lang and Spinicharixa gen. nov., cheilostome bryozoans from the Lower Cretaceous. Bulletin of the British Museum of Natural History 40:197–222.Google Scholar
Taylor, P. D. 1988. Major radiation of cheilostome bryozoans: triggered by the evolution of a new larval type? Historical Biology 1:45–64.Google Scholar
True, M. A. 1970. Étude quantitative de quatre peuplements sciaphiles sur substrat rocheux dans la région Marseillaise. Bulletin de l'Institut Océanographique 69:1–41.Google Scholar
Turner, R. F. 1973. The Paleoecologic and Paleobiogeographic Implications of the Maastrichtian Cheilostomata (Bryozoa) of the Navesink. Unpublished Ph.D. thesis, Rutgers University.Google Scholar
Vance, R. R. 1979. Effects of grazing by the sea urchin, Centrostephanus coronatus, on prey community composition. Ecology 60:537–546.Google Scholar
Vermeij, G. J. 1987. Evolution and Escalation. Princeton University Press; Princeton, New Jersey.Google Scholar
Voigt, E. 1959. Le signification stratigraphique des Bryozoaires dans le Cretace superieur. Congès des Sociétés Savantes de Provence 84:701–707.Google Scholar
Voigt, E. 1980. Arachnidium longicauda n. sp. (Bryozoa Ctenostomata) aus der Maastrichter Tuffkriede (Oberen Krieck, Maa-strichtium). Neues Jahrbuch Geologie und Paläontologie 1980:738–746.Google Scholar
Voigt, E. 1983. Zur biogeographie der europäischen Ober-kriede-Bryozoenfauna. Zitteliana 10:317–347.Google Scholar
Walters, L. J., and Wethey, D. S. 1986. Surface topography influences competitive hierarchies on marine hard substrata: a field experiment. Biological Bulletin 170:441–449.Google Scholar
Wells, H. W., Wells, M. J., and Gray, I. E. 1964. The calico scallop community in North Carolina. Bulletin of Marine Science of the Gulf and Caribbean 14:561–593.Google Scholar
Wilson, M. A. 1985. Disturbance and ecologic succession in an Upper Ordovician cobble-dwelling hardground fauna. Science 228:575–577.Google Scholar
Winston, J. E. 1982. Marine bryozoans (Ectoprocta) of the Indian River Area (Florida). American Museum of Natural History Bulletin 173:99–176.Google Scholar
Winston, J. E. 1986. An annotated checklist of coral-associated bryozoans. American Museum Novitates 2859.Google Scholar
Winston, J. E., and Hakansson, E. 1986. The interstitial bryozoan fauna from Capron Shoal, Florida. American Museum Novitates 2865.Google Scholar
Winston, J. E., and Jackson, J. B. C. 1984. Ecology of cryptic coral reef communities. IV. Community development and life histories of encrusting cheilostome Bryozoa. Journal of Experimental Marine Biology and Ecology 76:1–21.Google Scholar
Yoshioka, P. M. 1982a. Predator-induced polymorphism in the bryozoan Membranipora membranaceae (L.). Journal of Experimental Marine Biology and Ecology 61:233–242.Google Scholar
Yoshioka, P. M. 1982b. Role of planktonic and benthic factors in the population dynamics of the bryozoan Membranipora membranaceae. Ecology 63:457–468.Google Scholar
Zavodnik, D. 1963. Pinna nobilis L. comme centre d'association. Rapport de la Commission Internationale pour l'Exploration Scientifique de la Mer Méditerranée 17:271–275.Google Scholar
Zimmer, R. L. 1973. Morphological and development affinities of the lophophorates. Pp. 593–599. In Larwood, G. P. (ed.) Living and Fossil Bryozoa. Academic Press; New York.Google Scholar
Zimmer, R. L., and Woollacott, R. M. 1977. Metamorphosis, ancestrulae, and coloniality in bryozoan life cycles. Pp. 91–142. In Woollacott, R. M., and Zimmer, R. L. (eds.), Biology of Bryozoans. Academic Press; New York.Google Scholar