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Calendar scale, environmental variation preserved in the skeletal phenotype of a fossil bryozoan (Rhombopora blakei n. sp.), from the Mississippian of Ireland

  • Steven J. Hageman (a1), Patrick N. Wyse Jackson (a2), Aaron R. Abernethy (a1) and Margret Steinthorsdottir (a2) (a3)

Abstract

A single large colony (20 cm) of Rhombopora blakei n. sp. from the Hook Head Formation of Ireland (Tournaisian Stage, Mississippian) permits an analysis of within-colony variation associated with environmental change at a calendar scale (days to decades). Morphometric data for three external characters—apertures spacing along a branch and diagonal to a branch as well as lateral zooecial spacing—were collected as growth series (16–30 generations) from 13 segments within the colony. ANOVA, post-hoc means testing and graphical analysis of standardized data revealed nearest neighbor effects at the zooecial level and non-random distribution of variances across the colony. Parametric tests for sequential nonrandomness revealed cyclic variation through growth transects at three levels (23.3, 9.4 and 5.3 generations). Comparisons to growth rates of modern bryozoans suggests that the longer-term cycles are annual and that the shortest cycles may be related to lunar tidal cycles. The exceptional size and preservation of this single specimen, which is a new species of rhabdomesine Bryozoa, reinforces the importance of collecting individual morphological measurements from randomly selected and widely spaced parts of a colony for taxonomic, evolutionary and ecological applications.

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Abbott, M. 1973. Intra- and intercolony variation in populations of Hippoporina neviani (Bryozoa-Cheilostomata), p. 223245. In Boardman, R. S., Cheetham, A. H., and Oliver, W. A. Jr. (eds.), Animal Colonies: Development and Function Through Time. Dowden, Hutchinson and Ross, Stroudsburg.
Astrova, G. G. and Morozova, I. P. 1956. Systematics of Bryozoa of the order Cryptostomata. Doklady Akademii Nauk SSSR, n.s., 110: 661664.
Ausich, W. I. and Sevastopulo, G. D. 1994. Taphonomy of Lower Carboniferous crinoids from the Hook Head Formation, Ireland. Lethaia, 27: 245256.
Ausich, W. I. and Sevastopulo, G. D. 2001. The Lower Carboniferous (Tournaisian) crinoids from Hook Head, County Wexford, Ireland. Monographs of the Palaeontographical Society, London, 137 p.
Austin, T. and Austin, T. 1843-1849. A monograph on Recent and fossil Crinoidea, with figures and descriptions of some Recent and fossil allied genera. London and Bristol. 32 p.
Bader, B. 2000. Life cycle, growth rate and carbonate production of Cellaria sinuosa, p. 136144. In Herrera Cubilla, A. and Jackson, J. B. C. (eds.), Proceedings of the 11th International Bryozoology Conference, Smithsonian Tropical Research Institute, Balboa, Republic of Panama.
Bader, B. and Schäfer, P. 2004. Skeletal morphogenesis and growth check lines in the Antarctic bryozoan Melicerita obliqua. Journal of Natural History, 38: 29012922.
Bancroft, A. J. 1986a. The Carboniferous fenestrate bryozoan Hemitrypa hibernica M'Coy. Irish Journal of Earth Sciences, 7: 111124.
Bancroft, A. J. 1986b. The Carboniferous fenestrate bryozoan Ptylopora pluma M'Coy. Irish Journal of Earth Sciences, 7: 3545.
Bancroft, A. J. 1988. Ovicells in Rectifenestella from the Lower Carboniferous of Ireland. Irish Journal of Earth Sciences, 9: 1922.
Bancroft, A. J. and Wyse Jackson, P. N. 1995. Revision of the Carboniferous bryozoan Fistulipora incrustans (Phillips, 1836), with remarks on the type species of Fistulipora M'Coy, 1849. Geological Journal, 30: 129143.
Barnes, D. K. A. 1995. Seasonal and annual growth in erect species of Antarctic bryozoans. Journal of Experimental Marine Biology and Ecology, 188: 181198.
Barnes, D. K. A., Webb, K. E., and Linse, K. 2006a. Slow growth of Antarctic bryozoans increases over 20 years and is anomalously high in 2003. Marine Ecology Progress Series, 314: 187195.
Barnes, D. K. A., Webb, K. E., and Linse, K. 2007. Growth rate and its variability in erect Antarctic bryozoans. Polar Biology, 30: 10691081.
Barnes, D. K. A., Fuentes, V., Clarke, A., Schloss, I. R., and Wallace, M. I. 2006b. Spatial and temporal variation in shallow seawater temperatures around Antarctica. Deep-Sea Research II, 53: 853865.
Bartley, J. W. and Anstey, R. L. 1987. Growth of monilae in the Permian trepostome Tabulipora carbonaria: evidence for periodicity and a new model of stenolaemate wall calcification, p. 916. In Ross, J. R. P., (ed.), Bryozoa: Present and Past. Western Washington University, Bellingham, Washington.
Beklemishev, W. N. 1969. Principles of Comparative Anatomy of Invertebrates; vol. 1, Promorphology. English edition (based on 3rd Russian edition), Oliver and Boyd Ltd., Edinburg and University of Chicago Press, Chicago.
Berning, B. 2007. The Mediterranean bryozoan Myriapora truncata (Pallas, 1776): a potential indicator of (palaeo-) environmental conditions. Lethaia, 40: 221232.
Blake, D. B. 1973. Acanthopore morphology and function in the bryozoan family Rhabdomesidae. Journal of Paleontology, 47: 421435.
Blake, D. B. 1976. Functional morphology and taxonomy of branch dimorphism in the Paleozoic bryozoan genus Rhabdomeson. Lethaia, 9: 169178.
Blake, D. B. 1983. Systematic descriptions for the Suborder Rhabdomesina, p. 550592. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G, Bryozoa–Revised 1. Geological Society of America, Boulder, Coloradoand University of Kansas, Lawrence, Kansas.
Boardman, R. S., Cheetham, A. H., and Cook, P. L. 1970. Intracolony variation and the genus concept in Bryozoa, p. 294320. In Yochelson, E. L., (ed.), Proceedings of the North American Paleontological Convention, September 1969, Part C, Chicago.
Boardman, R. S., Cheetham, A. H., and Cook, P. L. 1983. Introduction to the Bryozoa, p. 348. In Robison, R. A. (ed.), Treatise on Invertebrate Paleontology, Part G, Bryozoa Revised. The Geological Society of America and the University of Kansas, Boulder, Colorado and Lawrence, Kansas.
Boardman, R. S., Cheetham, A. H., Oliver, W. A. Jr., Coates, A. G., and Bayer, F. M. 1973. Introducing coloniality, p. vix. In Boardman, R. S., Cheetham, A. H., and Oliver, W. A. Jr. (eds.), Animal Colonies: Development and Function Through Time. Dowden, Hutchinson and Ross, Stroudsburg.
Borg, F. 1926. Studies on Recent cyclostomatous Bryozoa. Zoologiska Bidrag från Uppsala, 10: 181507.
Brande, S. and Bretsky, S. S. 1982. Avoid improper statistical analysis in bryozoans: analysis of variance is suitable for study of hierarchical variation. Journal of Paleontology, 56: 12071212.
Brey, T., Gerdes, D., Gutt, J., Mackensen, A., and Starmans, A. 1999. Growth and age of the Antarctic bryozoan Cellaria incula on the Weddell Sea shelf. Antarctic Science, 11: 408414.
Brey, T., Gutt, J., Mackensen, A., and Starmans, A. 1998. Growth and productivity of the high Antarctic bryozoan Melicerata obliqua. Marine Biology, 132: 327333.
Buss, L. W. and Jackson, J. B. C. 1979. Competitive networks: nontransitive competitive relationships in cryptic coral reef environments. American Naturalist, 113: 223234.
Cheetham, A. H., Jackson, J. B. C., and Hayek, L. A. C. 1993. Quantitative genetics of bryozoan phenotypic evolution. I. Rate tests for random change versus selection in differentiation of living species. Evolution, 47: 15261538.
Cheetham, A. H., Jackson, J. B. C., and Hayek, L. A. C. 1995. Quantitative genetics of bryozoan phenotypic evolution. III. Phenotypic plasticity and the maintenance of genetic variation. Evolution, 49: 290296.
Cleary, D. M. and Wyse Jackson, P. N. 2007. Stenophragmidium Bassler, 1952 (Trepostomida: Bryozoa) from the Mississippian of Ireland and Britain. Irish Journal of Earth Sciences, 25: 125.
Cocito, S. and Ferdeghini, F. 1998. Marcatura con colorante ed etichettatura: due metodi per misurare la crescita in briozoi calcificati. Proceedings 12th Congresso Associazione ltaliana Oceanografia e Limnologia, Isola di Vulcano, 2: 351358.
Cocito, S., Novosel, M., Pasaric, Z., and Key, M. M. Jr. 2006. Growth of the bryozoan Pentapora fascialis (Cheilostomata, Ascophora) around submarine freshwater springs in the Adriatic Sea. Linzer Biologie Beiträge, 38: 1524.
Dresser, A. M. 1960. The Polyzoa of the Lower Carboniferous of Hook Head County Wexford and of Malahide County Dublin. Unpublished , University of Dublin.
Duncan, M. 2003. Early Carboniferous chondrichthyan Thrinacodus from Ireland, and a reconstruction of jaw apparatus. Acta Palaeontologica Polonica, 48: 113122.
Ehrenberg, C. G. 1831. Symbolae physicae, seu icones et descriptiones mammalium, avium, insectorum et animalium evertebratorum … Pars Zoologica. 4. Animalia evertebrate exclusis insectis. Decus Primula., Berlin.
Elias, M. K. 1964. Stratigraphy and paleoecology of some Carboniferous bryozoans, p. 375381. In Tome 1, Cinquième Congrès International de Stratigraphie et de Géologie du Carbonifère, Compte Rendu. Paris.
Falcon-Lang, H. J. 1999. The Early Carboniferous (Courceyan–Arundian) monsoonal climate of the British Isles: evidence from growth rings in fossil woods. Geological Magazine, 136: 177187.
Farmer, J. D. and Rowell, A. J. 1973. Variation in the bryozoan Fistulipora decora (Moore and Dudley) from the Beil Limestone of Kansas, p. 377394. In Boardman, R. S., Cheetham, A. H., and Oliver, W. A. Jr. (eds.), Animal Colonies: Development and Function Through Time. Dowden, Hutchinson and Ross, Stroudsburg.
Franco, M. 1986. The influence of neighbours on the growth of modular organisms with an example from trees. Philosophical Transactions of the Royal Society, London, B, 313: 209225.
Hageman, S. J. 1995. Observed phenotypic variation in a Paleozoic bryozoan. Paleobiology, 21: 314328.
Hageman, S. J. and Sawyer, J. A. 2006. Phenotypic variation in the bryozoan Leioclema punctatum (Hall, 1858) from Mississippian ephemeral host microcommunities. Journal of Paleontology, 80: 10471057.
Hageman, S. J., Needham, L. L., and Todd, C. D. 2009. Threshold effects of food concentration on the skeletal morphology of the marine bryozoan Electra pilosa (Linnaeus, 1767). Lethaia, 42: 438451.
Hageman, S. J., Bayer, M. M., and Todd, C. D. 1999. Partitioning phenotypic variation: genotypic, environmental and residual components from bryozoan skeletal morphology. Journal of Natural History, 33: 17131735.
Hageman, S. J., Bayer, M. M., and Todd, C. D. 2002. Partitioning phenotypic variation: implications for morphometric analyses (Bryozoa), p. 131140. In Wyse Jackson, P. N., Buttler, C. J., and Spencer Jones, M. E. (eds.), Bryozoan Studies 2001. Swets and Zeitlinger, Lisse.
Hayward, P. J. 1995. Antarctic Cheilostomatous Bryozoa. Oxford University Press, Oxford, New York, Tokyo. 355 p.
Hayward, P. J. and Ryland, J. S. 1998. Cheilostomatous Bryozoa. Part 1. Aeteoidea – Cribrilinoidea. In Barnes, R. S. K. and Crothers, J. H. (eds.), Synopses of the British Fauna (new series), No. 10, Shrewsbury, Field Studies Council, 366 p.
Hermansen, P., Larsen, P. S., and Riisgård, H. U. 2001. Colony growth rate of encrusting marine bryozoans (Electra pilosa and Celleporella hyalina). Journal of Experimental Marine Biology and Ecology, 263: 123.
Hickey, D. R. 1987. Skeletal structure, development, and elemental composition of the Ordovician trepostome bryozoan Peronopora. Palaeontology, 30: 691716.
Holdener, E. J. and Hageman, S. J. 1998. Implications of intracolonial variation in a Paleozoic bryozoan. Journal of Paleontology, 72: 809818.
Hunter, E. and Hughes, R. N. 1994. The influence of temperature, food ration and genotype on zooid size in Celleporella hyalina (L.), p. 8386. In Hayward, P. J., Ryland, J. S., and Taylor, P. D. (eds.), Biology and Palaeobiology of Bryozoans. Olsen and Olsen, Fredensborg, Denmark.
Jackson, J. B. C. and Cheetham, A. H. 1990. Evolutionary significance of morphospecies: a test with cheilostome Bryozoa. Science, 248: 579583.
Johnston, I. S. and Higgins, A. C. 1981. Conodont faunas from the Lower Carboniferous rocks at Hook Head, County Wexford. Journal of Earth Sciences, Royal Dublin Society, 4: 8396.
Key, M. M. Jr. 1987. Partitioning of morphological variation across stability gradients in Upper Ordovician trepostomes, p. 145152. In Ross, J. R. P. (ed.), Bryozoa: Present and Past. Western Washington University, Bellingham.
Key, M. M. Jr., Wyse Jackson, P. N., Miller, K. E., and Patterson, W. P. 2008. A stable isotope test for the origin of fossil brown bodies in Trepostome bryozoans from the Ordovician of Estonia, p. 7584. In Hageman, S. J., Key, M. M. Jr. and Winston, J. E. (eds.), Bryozoan Studies 2007. Virginia Museum of Natural History Special Publication Number 15.
Lombardi, C., Cocito, S., Occhipinti-Ambrogi, A., and Hiscock, K. 2006. The influence of seawater temperature on zooid size and growth rate in Pentapora fascialis (Bryozoa: Cheilostomata). Marine Biology, 149: 11031109.
M'Coy, F. 1844. A synopsis of the characteristics of the Carboniferous Limestone fossils of Ireland. Dublin University Press, Dublin, 207 p.
Meek, F. B. 1872. Report on the paleontology of eastern Nebraska, p. 81239. In Hayden, F. V. (ed.), Final Report of the United States Geological Survey of Nebraska and portions of the adjacent territories. U.S. Government Printing Office, Washington.
Miller, T. G. 1961. New Irish Tournaisian fenestellids. Geological Magazine, 98: 493500.
Mottequin, B. 2010. Mississippian (Tournaisian) brachiopods from the Hook Head Formation, County Wexford (south-east Ireland). Special Papers in Palaeontology, 84: 243285.
Nikiforova, A. I. 1948. Lower Carboniferous bryozoans of Karatau. Academiya Nauk Kazakhskoi SSR, Alma-Ata, 53 p.
Newton, G. B. 1971. Rhabdomesid bryozoans of the Wreford Megacyclothem (Wolfcampian, Permian) of Nebraska, Kansas, and Oklahoma. University of Kansas Paleontological Contributions, 56: 171.
Nudds, J. R. 1983. The Carboniferous coral Palaeacis in Ireland. Palaeontology, 26: 211225.
O'Dea, A. 2003. Seasonality and zooid size variation in Panamanian encrusting bryozoans. Journal of the Marine Biological Association of the United Kingdom, 83: 11071108.
O'Dea, A. and Okamura, B. 1999. Influence of seasonal variation in temperature, salinity, and food availability on module size and colony growth of the estuarine bryozoan Conopeum seurati. Marine Biology, 135: 581588.
O'Dea, A. and Okamura, B. 2000. Intracolony variation in zooid size in cheilostome bryozoans as a new technique for investigating palaeoseasonality. Palaeogeography, Palaeoclimatology, Palaeoecology, 162: 319332.
O'Dea, A. and Jackson, J. B. C. 2002. Bryozoan growth mirrors contrasting seasonal regimes across the Isthmus of Panama. Palaeogeography, Palaeoclimatology, Palaeoecology, 185: 7794.
Okamura, B. 1988. Seasonal changes in zooid size and feeding activity in epifaunal colonies of Electra pilosa, p. 197204. In Ross, J. R. P. (ed.), Bryozoa: Past and Present. Bellingham: Western Washington University.
Okamura, B. 1992. Microhabitat variation and patterns of colony growth and feeding in a marine bryozoan. Ecology, 73: 15021513.
Okamura, B. and Bishop, J. D. D. 1988. Zooid size in cheilostome bryozoans as an indicator of relative palaeotemperature. Palaeogeography, Palaeoclimatology and Palaeoecology, 66: 145152.
Osborn, R. 1940. Bryozoa of Porto Rico with a resume of West Indian Bryozoan fauna. Scientific Survey of Porto Rico and the Virgin Islands, 16: 321486.
Owen, D. E. 1966. New Carboniferous Polyzoa from Derbyshire. Geological Journal, 5: 135148.
Owens, R. M. 2000. The Carboniferous trilobites from Ireland described by Phillips, Portlock, M'Coy and Woodward. Irish Journal of Earth Sciences, 18: 132.
Pachut, J. F. 1982. Morphologic variation within and among genotypes in two Devonian bryozoan species: an independent indicator of paleostability? Journal of Paleontology, 56: 703716.
Pachut, J. F. and Anstey, R. L. 1979. A developmental explanation of stability-diversity-variation hypotheses: Morphogenetic regulation in Ordovician bryozoan colonies. Paleobiology, 5: 168187.
Pätzold, J., Ristedt, H., and Wefer, G. 1987. Rate of growth and longevity of a large colony of Pentapora foliate (Bryozoa) recorded in their oxygen isotope profiles. Marine Biology, 96: 535538.
Phillips, J. 1841. Figures and description of the Palaeozoic fossils of Cornwall, Devon, and West Somerset. Longman, Brown, Green and Longmans, London, 231 p.
Schopf, T. J. M. 1976. Environmental versus genetic causes of morphologic variability in bryozoan colonies from the deep sea. Paleobiology, 2: 156165.
Schopf, T. J. M. and Dutton, A. R. 1976. Parallel clines in morphologic and genetic differentiation in a coastal zone marine invertebrate. Paleobiology, 2: 255264.
Simpson, G. B. 1895. A handbook of the genera of North American Paleozoic Bryozoa; with an introduction upon the structure of living species. New York State Geology 14th Annual Report, 403669.
Sleeman, A. G. 1977. Lower Carboniferous transgressive facies in the Porter's Gate Formation at Hook Head, Co. Wexford. Proceedings of the Royal Irish Academy, 77B: 269285.
Sleeman, A. G., Johnston, I. S., Naylor, D., and Sevastopulo, G. D. 1974. The Stratigraphy of the Carboniferous rocks of Hook Head, Co. Wexford. Proceedings of the Royal Irish Academy, 74B: 227243.
Smith, A. M., Stewart, B., Key, M. M. Jr., and Jamet, C. M. 2001. Growth and carbonate production by Adeonellopsis (Bryozoa: Cheilostomata) in Doubtful Sound, New Zealand. Palaeogeography, Palaeoclimatology, Palaeoecology, 175: 201210.
Smyth, L. B. 1928. Salpingium palinorsum: a new Carboniferous coral. Scientific Proceedings of the Royal Dublin Society, 19: 3942.
Smyth, L. B. 1930. The Carboniferous rocks of Hook Head, Co. Wexford. Proceedings of the Royal Irish Academy, 39B: 523566.
Stebbing, A. R. D. 1971. Growth of Flustra foliacea (Bryozoa). Marine Biology, 9: 267273.
Tavener-Smith, R. 1969. Skeletal structure and growth in the Fenestellidae (Bryozoa). Palaeontology, 12: 281309.
Tavener-Smith, R. 1974. Early growth stages in rhabdomesoid bryozoans from the Lower Carboniferous of Hook Head, Ireland. Palaeontology, 17: 149164.
Taylor, P. D. and Furness, R. W. 1978. Astogenetic and environmental variation of zooid size within colonies of Jurassic Stomatopora (Bryozoa, Cyclostomata). Journal of Paleontology, 52: 10931102.
Tietzsch-Tyler, D. and Sleeman, A. G. 1994. A geological description of South Wexford and adjoining parts of Waterford, Kilkenny and Carlow to accompany the Bedrock Geology 1:100,000 scale map series, Sheet 23, South Wexford. Geological Survey of Ireland, Dublin.
Trizna, V. B. 1958. Early Carboniferous bryozoans of the Kuznetsk Basin. Trudy Vsesojuznyj nauchno-Issledovatel'skyj geologo-razvedocnyj Instituta, 122: 1436.
Udhayakumar, M. and Karande, A. A. 1989. Growth and breeding in cheilostome biofouler, Electra bengalensis Stoliczka in Bombay waters, west coast of India. Indian Journal of Marine Science, 18: 9599.
Urbanek, A. 2004. Morphogenetic gradients in graptolites and bryozoans. Acta Palaeontolgica Polonica, 49: 485504.
Vine, G. R. 1884. Fourth report of the committee, consisting of Dr. H.C. Sorby and Mr. G.R. Vine, appointed for the purpose of reporting on fossil Bryozoa. Report of the British Association for the Advancement of Science (Southport, 1883), 161209.
Winston, J. E. 1976. Experimental culture of the estuarine ectoproct Conopeum tenuissimum from Chesapeake Bay. Biological Bulletin, 150: 318335.
Winston, J. E. 1977. Feeding in marine bryozoans, p. 233271. In Woollacott, R. M. and Zimmer, R. L. (eds.), The Biology of Bryozoans. Academic Press, New York.
Winston, J. E. 1983. Patterns of growth, reproduction and mortality in bryozoans from the Ross Sea, Antarctica. Bulletin of Marine Sciences, 33: 688702.
Wyse Jackson, P. N. 1996. Bryozoa from the Lower Carboniferous (Visean) of County Fermanagh, Ireland. Bulletin of the Natural History Museum, London (Geology), 52: 119171.
Wyse Jackson, P. N., McKinney, F. K., and Bancroft, A. J. 2006. Fenestrate bryozoan genera based on species from Ireland originally described by Frederick M'Coy in 1844. Palaeontology, 49: 741767.
Zar, J. H. 1999. Biostatistical Analysis (4th edition). Prentice-Hall, Upper Saddle River, New Jersey, 929 p.

Calendar scale, environmental variation preserved in the skeletal phenotype of a fossil bryozoan (Rhombopora blakei n. sp.), from the Mississippian of Ireland

  • Steven J. Hageman (a1), Patrick N. Wyse Jackson (a2), Aaron R. Abernethy (a1) and Margret Steinthorsdottir (a2) (a3)

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