Life Cycle Stage Cerebral Ganglion Apical Organ Neurite Bundle Dwarf Male 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.



AW thanks the Faculty of Life Sciences, University of Vienna, for generous support while establishing his group during his first years in Vienna. The Danish Research Agency (FNU) and the Carlsberg Foundation as well as the European Commission are thanked for the support of his research during the Copenhagen years. Marion Hüffel provided invaluable support during this entire project and beyond. AW particularly thanks his coauthor, Ricardo Neves, for utmost productive years of cooperation into cycliophoran research.


  1. Baker JM, Giribet G (2007) A molecular phylogenetic approach to the phylum Cycliophora provides further evidence for cryptic speciation in Symbion americanus. Zool Scr 36:353–359CrossRefGoogle Scholar
  2. Baker JM, Funch P, Giribet G (2007) Cryptic speciation in the recently discovered American cycliophoran Symbion americanus; genetic structure and population expansion. Mar Biol 151:2183–2193CrossRefGoogle Scholar
  3. Funch P (1996) The chordoid larva of Symbion pandora (Cycliophora) is a modified trochophore. J Morphol 230:231–263CrossRefGoogle Scholar
  4. Funch P, Kristensen RM (1995) Cycliophora is a new phylum with affinities to Entoprocta and Ectoprocta. Nature 378:711–714CrossRefGoogle Scholar
  5. Funch P, Kristensen RM (1997) Cycliophora. In: Harrison FW, Woollacott RM (eds) Microscopic anatomy of invertebrates, vol 13, Lophophorates, Entoprocta and Cycliophora. Wiley-Liss, New York, pp 409–474Google Scholar
  6. Funch P, Kristensen RM (1999) Cycliophora. In: Knobil E, Neill JD (eds) Encyclopaedia of reproduction, vol 1. Academic, New York, pp 800–808Google Scholar
  7. Giribet G, Distel DL, Polz M, Sterrer W, Wheeler WC (2000) Triploblastic relationships with emphasis on the acoelomates and the position of Gnathostomulida, Cycliophora, Plathelminthes, and Chaetognatha: a combined approach of 18S rDNA sequences and morphology. Syst Biol 49:539–562PubMedCrossRefGoogle Scholar
  8. Hejnol A, Obst M, Stamatakis A, Ott M, Rouse GW, Edgecombe GD, Martinez P, Baguñà J, Bailly X, Jondelius U, Wiens M, Müller WEG, Seaver E, Wheeler WC, Martindale MQ, Giribet G, Dunn CW (2009) Assessing the root of bilaterian animals with scalable phylogenomic methods. Proc R Soc B 276:4261–4270PubMedCentralPubMedCrossRefGoogle Scholar
  9. Nedvěd O (2004) Occurrence of the phylum Cycliophora in the Mediterranean. Mar Ecol Prog Ser 277:297–299Google Scholar
  10. Neves RC, Kristensen RM, Wanninger A (2009a) Three-dimensional reconstruction of the musculature of various life cycle stages of the cycliophoran Symbion americanus. J Morphol 270:257–270PubMedCrossRefGoogle Scholar
  11. Neves RC, Sørensen KJK, Kristensen RM, Wanninger A (2009b) Cycliophoran dwarf males break the rule: high complexity with low cell-numbers. Biol Bull 217:2–5PubMedGoogle Scholar
  12. Neves RC, Cunha MR, Kristensen RM, Wanninger A (2010a) Comparative myoanatomy of cycliophoran life cycle stages. J Morphol 271:596–611PubMedGoogle Scholar
  13. Neves RC, Kristensen RM, Wanninger A (2010b) Serotonin immunoreactivity in the nervous system of the Pandora larva, the Prometheus larva and the dwarf male of Symbion americanus (Cycliophora). Zool Anz 249:1–12CrossRefGoogle Scholar
  14. Neves RC, Cunha MR, Funch P, Wanninger A, Kristensen RM (2010c) External morphology of the cycliophoran dwarf male: a comparative study of Symbion pandora and S. americanus. Helgol Mar Res 64:257–262CrossRefGoogle Scholar
  15. Neves RC, Cunha MR, Kristensen RM, Wanninger A (2010d) Expression of synapsin and co-localization with serotonin and RFamide-like immunoreactivity in the nervous system of the chordoid larva of Symbion pandora (Cycliophora). Invertebr Biol 129:17–26CrossRefGoogle Scholar
  16. Neves RC, Kristensen RM, Funch P (2012) Ultrastructure and morphology of the cycliophoran female. J Morphol 273:850–869PubMedCrossRefGoogle Scholar
  17. Neves RC, Bailly X, Reichert R (2014) Are copepods secondary hosts of Cycliophora? Org Divers Evol 14:363–367Google Scholar
  18. Neves RC, Reichert H (2015) Microanatomy and development of the dwarf male of Symbion pandora (Phylum Cycliophora): new insights from ultrastructural investigation based on serial section electron microscopy. PLoS ONE 10: e0122364 10.1007/s13127-014-0179-1
  19. Obst M, Funch P (2003) Dwarf male of Symbion pandora (Cycliophora). J Morphol 255:261–278PubMedCrossRefGoogle Scholar
  20. Obst M, Funch P, Kristensen RM (2006) A new species of Cycliophora from the mouthparts of the American lobster, Homarus americanus (Nephropidae, Decapoda). Org Div Evol 6:83–97Google Scholar
  21. Obst M, Funch P (2006) The microhabitat of Symbion pandora (Cycliophora) on the mouthparts of its host Nephrops norvegicus (Decapoda: Nephropidae). Mar Biol 148:945–951CrossRefGoogle Scholar
  22. Obst M, Funch P, Giribet G (2005) Hidden diversity and host specificity in cycliophorans: a phylogeographic analysis along the North Atlantic and Mediterranean Sea. Mol Ecol 14:4427–4440PubMedCrossRefGoogle Scholar
  23. Paps J, Baguña J, Riutort M (2009) Lophotrochozoan internal phylogeny: new insights from an up-to-date analysis of nuclear ribosomal genes. Proc R Soc B 276:1245–1254PubMedCentralPubMedCrossRefGoogle Scholar
  24. Wanninger A (2005) Immunocytochemistry of the nervous system and the musculature of the chordoid larva of Symbion pandora (Cycliophora). J Morphol 265:237–243PubMedCrossRefGoogle Scholar
  25. Winnepenninckx B, Backeljau T, Kristensen RM (1998) Relations of the new phylum Cycliophora. Nature 393:636–638CrossRefGoogle Scholar

Copyright information

© Springer-Verlag Wien 2015

Authors and Affiliations

  1. 1.Department of Integrative ZoologyUniversity of ViennaViennaAustria
  2. 2.Biozentrum – Molecular ZoologyUniversity of BaselBaselSwitzerland

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