Claus Nielsen

Claus Nielsen

Professor emeritus, Professor, emeritus

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    ORCID: 0000-0001-6898-7655

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    1. Published

      Phylum Entoprocta

      Nielsen, Claus, 2002, Atlas of Marine Invertebrate Larvae. Young, C. M. (ed.). London: Academic Press, p. 397-409

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

    2. Published

      Phylum Entoprocta: The Entoprocts (revised)

      Nielsen, Claus, 2023, Invertebrates. Brusca, R. C., Giribet, G. & Moore, W. (eds.). 4 ed. New York: Sinauer Associates, p. 312-317 6 p.

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Education › peer-review

    3. Pogonophora: Living species found off the coast of Florida

      Nielsen, Claus, 1965, In: Science. 150, 3702, p. 1475-1476

      Research output: Contribution to journal › Journal article › Research › peer-review

    4. Published

      Proposing a solution to the Articulata-Ecdysozoa controversy

      Nielsen, Claus, 2003, In: Zoologica Scripta. 32, p. 475-482

      Research output: Contribution to journal › Journal article › Research › peer-review

    5. Published

      Protostomia

      Nielsen, Claus, 2013, Spezielle Zoologie. Teil 1: Einzeller und Wirbellose Tiere, 3. Auflage. Westheide, W. & Rieger, G. (eds.). Berlin: Springer Science+Business Media, p. 180 1 p.

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Education › peer-review

    6. Published

      Protostomie-deuterostome origins

      Nielsen, Claus, 2002, Encyclopedia of Evolution vol. 2. New York: Oxford University Press, p. 961-963

      Research output: Chapter in Book/Report/Conference proceeding › Encyclopedia chapter › Research

    7. Published

      Putative sensory structures in marine bryozoans

      Shunatova, N. N. & Nielsen, Claus, 2002, In: Invertebrate Biology. 121, p. 262-270

      Research output: Contribution to journal › Journal article › Research › peer-review

    8. Published

      Review of: Zoological Catalogue of Australia, vol. 34: Hemichordata, Tunicata, Cephalochordata

      Nielsen, Claus, 2000, In: Quarterly Review of Biology. 75, 4, p. 465

      Research output: Contribution to journal › Review › Research

    9. Published

      Six major steps in animal evolution - are we derived sponge larvae ?

      Nielsen, Claus, 2008, In: Evolution & Development. 10, 2, p. 241-257 17 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    10. Published

      Some Loxosomatidae (Entoprocta) from the Atlantic coast of the United States

      Nielsen, Claus, 1966, In: Ophelia. 3, 1, p. 249-275

      Research output: Contribution to journal › Journal article › Research › peer-review

    11. Published

      Some aspects of spiralian development

      Nielsen, Claus, 2010, In: Acta Zoologica. 91, 1, p. 20-28 9 p.

      Research output: Contribution to journal › Conference article › Research › peer-review

    12. Published

      Structure and function of an entoproct tentacle with a discussion of ciliary feeding types

      Nielsen, Claus & Rostgaard, J., 1976, In: Ophelia: international journal of marine biology. 15, p. 115-140

      Research output: Contribution to journal › Journal article › Research › peer-review

    13. Published

      Structure and function of metazoan ciliary bands and their phylogenetic significance

      Nielsen, Claus, 1987, In: Acta Zoologica. 68, p. 205-262

      Research output: Contribution to journal › Journal article › Research › peer-review

    14. Published

      Structure and occurrence of cyphonautes larvae (Bryozoa, Ectoprocta)

      Nielsen, Claus & Worsaae, Katrine, 2010, In: Journal of Morphology. 271, 9, p. 1094-1109 16 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    15. Published

      Studies on Danish entoprocta

      Nielsen, Claus, 1964, In: Ophelia. 1, 1, p. 1-76

      Research output: Contribution to journal › Journal article › Research › peer-review

    16. Published

      Summary of the Thai-Danish biodiversity project on the Andaman Sea continental shelf and slope (1996-2000)

      Bussaravit, S., Tendal, O. S., Nielsen, Claus & Rasmussen, A. R., 2008, In: Phuket Marine Biological Center. Special Publications. 31, p. 75-81 7 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    17. Published

      Summary of the Thai-Danish biodiversity project on the Andaman Sea continental shelf and slope (1996-2000)

      Bussarawit, S., Tendal, O. S., Nielsen, Claus & Rasmussen, A. R., 2008, In: Phuket Marine Biological Center. Special Publications. p. 75-81 7 p.

      Research output: Contribution to journal › Conference article › Research

    18. Published

      Systematics: Sequences lead to trees of worms

      Nielsen, Claus, 1998, In: Nature. 392, p. 25-26

      Research output: Contribution to journal › Letter › Research

    19. Published

      Tail Evolution

      Nielsen, Claus, 1997, In: Science. 277, p. 1422

      Research output: Contribution to journal › Letter › Research

    20. Published

      Tentacle structure and filter-feeding in Crisia eburnea and other cyclostomatous bryozoans, with a review of upstream-collecting mechanisms

      Nielsen, Claus & Riisgård, H. U., 1998, In: Marine Ecology - Progress Series. 168, p. 163-186

      Research output: Contribution to journal › Journal article › Research › peer-review

    21. Published

      Testing the new animal phylogeny: A phylum level molecular analysis of the animal kingdom

      Nielsen, Claus, 2008, In: Molecular Phylogenetics and Evolution. 49, p. 23-31 9 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    22. Published

      The "new phylogeny". What is new about it?

      Nielsen, Claus, 2010, In: Palaeodiversity. 3, Supplement, p. 149-150 2 p.

      Research output: Contribution to journal › Conference abstract in journal › Research › peer-review

    23. Published

      The authorship of chordate taxa

      Nielsen, Claus, Jun 2012, In: Zoologica Scripta. 41, 4, p. 435-436 2 p.

      Research output: Contribution to journal › Comment/debate › Research › peer-review

    24. Published

      The development of the brachiopod Crania (Neocrania) anomala (O. F. Müller) and its phylogenetic significance.

      Nielsen, Claus, 1991, In: Acta Zoologica (Stockholm). 72, p. 7-28

      Research output: Contribution to journal › Journal article › Research › peer-review

    25. Published

      The early Cambrian Halkieria is a mollusc

      Vinther, J. & Nielsen, Claus, 2005, In: Zoologica Scripta. 34, p. 81-89

      Research output: Contribution to journal › Journal article › Research › peer-review

    26. Published

      The larvae of Loxosoma pectinaricola and Loxosomella elegans (Entoprocta)

      Nielsen, Claus, 1967, In: Ophelia. 4, 2, p. 203-206

      Research output: Contribution to journal › Journal article › Research › peer-review

    27. Published

      The magnitude of global marine species diversity

      Appeltans, W., Ahyong, S. T., Anderson, G., Angel, M. V., Artois, T., Bailly, N., Bamber, R., Barber, A., Bartsch, I., Berta, A., Blazewicz-Paszkowycz, M., Bock, P., Boxshall, G., Boyko, C. B., Brandao, S. N., Bray, R. A., Bruce, N. L., Cairns, S. D., Chan, T-Y., Cheng, L. & 101 others, Collins, A. G., Cribb, T., Curini-Galletti, M., Dahdouh-Guebas, F., Davie, P. J. F., Dawson, M. N., De Clerck, O., Decock, W., De Grave, S., de Voogd, N. J., Domning, D. P., Emig, C. C., Erseus, C., Eschmeyer, W., Fauchald, K., Fautin, D. G., Feist, S. W., Fransen, C. H. J. M., Furuya, H., Garcia-Alvarez, O., Gerken, S., Gibson, D., Gittenberger, A., Gofas, S., Gomez-Daglio, L., Gordon, D. P., Guiry, M. D., Hernandez, F., Hoeksema, B. W., Hopcroft, R. R., Jaume, D., Kirk, P., Koedam, N., Koenemann, S., Kolb, J. B., Kristensen, Reinhardt Møbjerg, Kroh, A., Lambert, G., Lazarus, D. B., Lemaitre, R., Longshaw, M., Lowry, J., Macpherson, E., Madin, L. P., Mah, C., Mapstone, G., McLaughlin, P. A., Mees, J., Meland, K., Messing, C. G., Mills, C. E., Molodtsova, T. N., Mooi, R., Neuhaus, B., Ng, P. K. L., Nielsen, Claus, Norenburg, J., Opresko, D. M., Osawa, M., Paulay, G., Perrin, W., Pilger, J. F., Poore, G. C. B., Pugh, P., Read, G. B., Reimer, J. D., Rius, M., Rocha, R. M., Saiz-Salinas, J. I., Scarabino, V., Schierwater, B., Schmidt-Rhaesa, A., Schnabel, K. E., Schotte, M., Schuchert, P., Schwabe, E., Segers, H., Self-Sullivan, C., Shenkar, N., Siegel, V., Sterrer, W., Stohr, S., Swalla, B., Tasker, M. L., Thuesen, E. V., Timm, T., Todaro, M. A., Turon, X., Tyler, S., Uetz, P., van der Land, J., Vanhoorne, B., van Ofwegen, L. P., van Soest, R. W. M., Vanaverbeke, J., Walker-Smith, G., Walter, T. C., Warren, A., Williams, G. C., Wilson, S. P. & Costello, M. J., 4 Dec 2012, In: Current Biology. 22, 23, p. 2189-2202 14 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    28. Published

      The neuromuscular system of the cyclostome bryozoan Crisia eburnea (Linnaeus, 1758)

      Worsaae, Katrine, Frykman, T. & Nielsen, Claus, 2020, In: Acta Zoologica. 101, 2, p. 133-146

      Research output: Contribution to journal › Journal article › Research › peer-review

    29. Published

      The nudibranch names mentioned as n.sp. in Bergh (1861) are almost all nomina nuda (Gastropoda: Heterobranchia: Nudibranchia)

      Jensen, Kathe & Nielsen, Claus, 2014, In: Zootaxa. 3753, 2, p. 146-154 9 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    30. Published

      The origin of metamorphosis

      Nielsen, Claus, 2000, In: Evolution & Development. 2, p. 127-129

      Research output: Contribution to journal › Journal article › Research › peer-review

    31. Published

      The origin of the Metazoa

      Nielsen, Claus, 1992, The Unity of Evolutionary Biology. Portland, Oregon, USA: Dioscorides Press, p. 445-446

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

    32. Published

      The phylogenetic position of Entoprocta and Ectoprocta

      Nielsen, Claus, 2000, Proceedings of the 11th International Bryozoology Association Conference. Balboa, Panama: Smithsonian Tropical Research Institute, p. 66-73

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

    33. Published

      The phylogenetic position of Entoprocta, Ectoprocta, Phoronida and Brachiopoda

      Nielsen, Claus, 2002, In: Integrative and Comparative Biology. 42, p. 685-691

      Research output: Contribution to journal › Journal article › Research › peer-review

    34. Published

      The phylogenetic position of ctenophores and the origin(s) of nervous systems

      Jékely, G., Paps, J. & Nielsen, Claus, 2015, In: EvoDevo. 6, 8 p., 1.

      Research output: Contribution to journal › Journal article › Research › peer-review

    35. Published

      The phylogenetic position of the Arthropoda

      Nielsen, Claus, 1997, Arthropod Relationships (Systematics Association special Volume Series) no. 55. London: Chapman, p. 11-22

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

    36. Published

      The rearticulation of annelids

      Eibye-Jacobsen, Danny & Nielsen, Claus, 1996, In: Zoologica Scripta. 25, p. 275-282

      Research output: Contribution to journal › Journal article › Research › peer-review

    37. Published

      The relationships of Entoprocta, Ectoprocta and Phoronida

      Nielsen, Claus, 1977, In: Integrative and Comparative Biology. 17, p. 149-150

      Research output: Contribution to journal › Journal article › Research › peer-review

    38. Published

      The tentacle cilia of Aglantha digitale (Hydrozoa, Trachylina) and their control

      Mackie, G. O., Nielsen, Claus & Singla, C. L., 1989, In: Acta Zoologica. 70, p. 132-141

      Research output: Contribution to journal › Journal article › Research › peer-review

    39. Published

      The triradiate sucking pharynx in animal phylogeny

      Nielsen, Claus, Mar 2013, In: Invertebrate Biology. 132, 1, p. 1-13 13 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    40. Published

      The trochaea theory: an example of life cycle phylogeny

      Nielsen, Claus & Nørrevang, A., 1985, The Origins and Relationships of Lower Invertebrates. Conway Morris, S., George, J. D., Gibson, R. & Platt, H. M. (eds.). Oxford: Oxford University Press, p. 28-41 (The Systematics Association Special Volume, Vol. 28).

      Research output: Chapter in Book/Report/Conference proceeding › Book chapter › Research

    41. Published

      Three new species of Loxosoma (Entoprocta) from Phuket, Thailand, with a review of the genus

      Nielsen, Claus, 1996, In: Zoologica Scripta. 25, p. 61-76

      Research output: Contribution to journal › Journal article › Research › peer-review

    42. Published

      Three new species of Entoprocta from West Norway

      Ryland, J. S. & Nielsen, Claus, 1961, In: Sarsia: North Atlantic marine science. 1, p. 39-45

      Research output: Contribution to journal › Journal article › Research › peer-review

    43. Published

      To sære 'orme'

      Nielsen, Claus, 2004, In: Dyr i Natur og Museum. 1, p. 27-29

      Research output: Contribution to journal › Journal article › Communication

    44. Published

      Trochophora larvae and adult body regions in annelids: some conclusions

      Nielsen, Claus, 2005, In: Hydrobiologia. 535/536, p. 23-24

      Research output: Contribution to journal › Journal article › Research › peer-review

    45. Published

      Trochophora larvae: Cell-lineages, ciliary bands and body regions. 2. Other groups and general discussion

      Nielsen, Claus, 2005, In: Journal of Experimental Zoology. Part B: Molecular and Developmental Evolution. 304B, p. 401-447

      Research output: Contribution to journal › Journal article › Research › peer-review

    46. Published

      Trochopora larvae: Cell-lineages, Ciliary bands, and body regions. 1. Annelida and Mollusca

      Nielsen, Claus, 2004, In: Journal of Experimental Zoology. Part B: Molecular and Developmental Evolution. 302B, p. 35-68

      Research output: Contribution to journal › Journal article › Research › peer-review

    47. Published

      Ultrastructure of spermiogenesis in Cristatella mucedo Cuvier (Bryozoa: Phylactolaemata: Cristatellidae)

      Lützen, J., Jespersen, Å. & Nielsen, Claus, 2009, In: Zoomorphology. 128, p. 275-283

      Research output: Contribution to journal › Journal article › Research › peer-review

    48. Published

      Was the ancestral panarthropod mouth ventral or terminal?

      Nielsen, Claus, 2019, In: Acta Zoologica. 49, p. 152-154 3 p.

      Research output: Contribution to journal › Journal article › Research › peer-review

    49. Published

      What cell lineage tell us about the evolution of Spiralia remains to be seen

      Nielsen, Claus & Meier, R., 2002, In: Evolution. 56, 12, p. 2554-2557

      Research output: Contribution to journal › Journal article › Research › peer-review

    50. Published

      Who came first, sponges or comb jellies?

      Nielsen, Claus, 2020, https://sciencenordic.com/researchers-zone.

      Research output: Other contribution › Net publication - Internet publication › Communication

    51. Published

      Why not 'EURYSTOMATA' ?

      Nielsen, Claus, 2018, In: IBA Bulletin. 14, 2, p. 12-13 2 p.

      Research output: Contribution to journal › Comment/debate › Research

    52. Published

      Yngelpleje hos mosdyr

      Nielsen, Claus, 1984, In: Dyr i Natur og Museum. p. 16-18

      Research output: Contribution to journal › Journal article › Communication

    53. Published

      Zoologi

      Nielsen, Claus, 2001, Danmarks Nationalleksikon. Vol. 20. p. 471-473

      Research output: Chapter in Book/Report/Conference proceeding › Encyclopedia chapter › Communication

    54. Published

      [Ciliated larvae: A reply to O.M. Ivanova Kazas] (In Russian, English summary)

      Nielsen, Claus, 1988, In: Zoologicheskii Zhurnal. 67, p. 776-777

      Research output: Contribution to journal › Journal article › Research › peer-review

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