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Polar Biology

, Volume 32, Issue 9, pp 1251–1259 | Cite as

A new genus and three new species of Antarctic cheilostome Bryozoa

  • Piotr KuklinskiEmail author
  • David K. A. Barnes
Original Paper

Abstract

Three new cheilostome bryozoans species were discovered in the collections of the BIOPEARL I cruise to the Scotia Arc. The species were found on boulders from the continental slope and shelf-break of Powell Basin, South Georgia and Shag Rocks in Agassiz trawl catches from the RRS James Clarke Ross. Amphiblestrum henryi sp. nov. is characterised by a conspicuous avicularium acute to the frontal surface overarching more than half of the opesia. On the distobasal edge of the avicularium there are 1–4 processes pointed distally and distolaterally. Inferusia taylori gen. et sp. nov. is characterised by a reduced gymnocyst, extensive costate frontal shield, and an avicularium distal of the orifice. Antarctothoa haywardi sp. nov. has three types of zooids: autozooids, male and female, the males possessing a tiny orifice in relation to zooid size. The species is very similar to Antarcothoa alia but the shape of the autozooidal orifice, with its deeper and narrower sinus, as well as a lack of condyles in the proximal corners of the male orifice allow the species to be recognized as new.

Keywords

Antarctic Bryozoa Taxonomy New species Southern Ocean Biodiversity 

Notes

Acknowledgments

Mary Spencer Jones (Department of Zoology, NHM) is thanked for her assistance with collections. We would like also to thank Paul Taylor, Peter Hayward, Dennis Gordon, Juan Lopez Gappa, and Carlos López-Fé de la Cuadra for discussions leading to an improvement of manuscript. This study was supported by a grant from the Polish Ministry of Science and Higher Education (No N N304 270434).

References

  1. Bader B, Schäfer P (2004) Skeletal morphogenesis and growth check lines in the Antarctic bryozoan Melicerita oblique. J Nat Hist 38:2901–2922. doi: 10.1080/00222930310001657685 CrossRefGoogle Scholar
  2. Barnes DKA (2008) A benthic richness hotspot in the Southern Ocean: slope and shelf cryptic benthos of Shag Rocks. Antarct Sci 20:263–270Google Scholar
  3. Barnes DKA, Griffiths HJ (2008) Biodiversity and biogeography of southern temperate and polar bryozoans. Glob Ecol Biogeogr 17:84–99Google Scholar
  4. Barnes DKA, Webb K, Linse K (2007) Growth rate and its variability in erect Antarctic bryozoans. Polar Biol 30:1069–1081. doi: 10.1007/s00300-007-0266-2 CrossRefGoogle Scholar
  5. Griffiths HJ, Barnes DKA, Linse K (2008) Towards a generalized biogeography of the Southern Ocean benthos. J Biogeogr 36:162–177. doi: 10.1111/j.1365-2699.2008.01979.x CrossRefGoogle Scholar
  6. Hayward PJ (1995) Antarctic Cheilostomatous Bryozoa. Oxford University Press, Oxford, pp 355Google Scholar
  7. Hayward PJ, Taylor PD (1984) Fossil and recent Cheilostomata (Bryozoa) from the Ross Sea, Antarctica. J Nat Hist 18:71–94. doi: 10.1080/00222938400770091 CrossRefGoogle Scholar
  8. Hughes RN, Gomez A, Wright PJ, Moyano HI, Cancino JM, Carvalho GR, Lunt DH (2008) Molecular phylogeny supports division of the ‘cosmopolitan’ taxon Celleporella (Bryozoa; Cheilostomata) into four major clades. Mol Phylogenet Evol 46:369–374. doi: 10.1016/j.ympev.2007.08.014 PubMedCrossRefGoogle Scholar
  9. IPCC 2007 Climate change (2007) The Intergovermental Panel on Climate Change 4th assessment report. http://www.ipcc.ch
  10. Kuklinski P, Gulliksen B, Lønne OJ, Weslawski JM (2006) Substratum as a structuring influence on assemblages of Arctic bryozoans. Polar Biol 29:652–661. doi: 10.1007/s00300-005-0102-5 CrossRefGoogle Scholar
  11. López-Fé de la Cuadra CM, Garcia-Gomez JC (2000) The cheilostomate Bryozoa (Bryozoa: Cheilostomatida) collected by the Spanish ‘Antartida 8611’ expedition to the Scotia Arc and South Shetland Islands. J Nat Hist 34:755–772. doi: 10.1080/002229300299408 CrossRefGoogle Scholar
  12. Moyano HG (1987) Bryozoa marinos Chilenos VI Cheilostomata Hippothoidae: South Eastern Pacific species. Bol Soc Biol Concepcion 57:89–135Google Scholar
  13. Peck LS, Barnes DKA (2003) Metabolic flexibility: the key to long-term ecological success in Bryozoa? Proc R Soc Lond B Biol Sci 271(Suppl):18–21. doi: 10.1098/rsbl.2003.0053
  14. Peck LS, Webb K, Bailey D (2004) Extreme sensitivity of biological function to temperature in Antarctic marine species. Funct Ecol 18:625–630. doi: 10.1111/j.0269-8463.2004.00903.x CrossRefGoogle Scholar
  15. Rex MA, Etter RJ, Morris JS, Crouse J, McClain CR, Johnston NA, Stuart CT, Deming JW, Thies R, Avery R (2006) Global bathymetric patterns of standing stock and body size in the deep-sea benthos. Mar Ecol Prog Ser 317:1–8. doi: 10.3354/meps317001 CrossRefGoogle Scholar
  16. Smith AM (2007) Age, growth and carbonate production by erect rigid bryozoans in Antarctica. Palaeogeogr Palaeoclimatol Palaeoecol 256:86–98. doi: 10.1016/j.palaeo.2007.09.007 CrossRefGoogle Scholar
  17. Thatje S, Hillenbrand C-D, Larter RD (2005) On the origin of Antarctic marine benthic community structure. Trends Ecol Evol 20:534–540. doi: 10.1016/j.tree.2005.07.010 PubMedCrossRefGoogle Scholar
  18. Whitehouse MJ, Meredith MP, Rothery P, Atkinson A, Ward P, Korb RE (2009) Rapid warming of the ocean around South Georgia, Southern Ocean, during the 20th century: forcings, characteristics and implications for lower trophic levels. Deep Sea Res Part I Oceanogr Res Pap (in press). doi: 10.1016/j.dsr.2008.06.002
  19. Wright PJ, Hayward PJ, Hughes RN (2007) New species of Antarctothoa (Cheilostomata: Hippothoidae) from the Falkland Isles, South Shetland Isles and the Magellan Strait. J Mar Biol Assoc UK 87:1133–1140. doi: 10.1017/S0025315407056809 CrossRefGoogle Scholar

Copyright information

© Springer-Verlag 2009

Authors and Affiliations

  1. 1.Institute of Oceanology, Polish Academy of SciencesSopotPoland
  2. 2.British Antarctic Survey, Natural Environment Research CouncilCambridgeUK

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