Revision of some coastal species of bitentaculate Cirratulidae (Annelida, Cirratulida) from the North-East Atlantic

Keywords: integrative taxonomy, North Sea, Norwegian Sea, Skagerrak, polychaetes

Abstract

The family Cirratulidae is a diverse group of benthic polychaetes with about 400 species described worldwide. Fifty-eight nominal species are recorded in Europe, but recent DNA analyses have revealed that between 83 and 96 additional species inhabit European benthic environments and probably most of them are still undescribed. In this paper, two historical species are re-described due to the lack of details about some relevant morphological characters in the original descriptions: Aphelochaeta marioni (Saint-Joseph, 1894) and Aphelochaeta mcintoshi (Southern, 1914) comb. nov. Following these redescriptions, three new species of the genera Aphelochaeta and Tharyx are described: Aphelochaeta annae sp. nov., Aphelochaeta elinorae sp. nov. and Tharyx emmae sp. nov. Finally, new records of Tharyx maryae Blake & Göransson, 2015, Tharyx robustus Blake & Göransson, 2015 and Kirkegaardia serrata (Eliason, 1962) are presented along with a description of the material examined.

References

Bellan G. 2001. Annelida Polychaeta. In: Costello M.J., Emblow C.S. & White R. (eds) European Register of Marine Species: A check-list of the marine species in Europe and a bibliography of guides to their identification: 214–231. Patrimoines Naturels 50. Publications Scientifiques du MNHN.

Blake J.A. 1991. Revision of some genera and species of Cirratulidae (Polychaeta) from the western North Atlantic. Ophelia Supplement 5: 17–30. https://doi.org/10.1163/9789004629745_005

Blake J.A. 1996. Family Cirratulidae Ryckholdt, 1851. Including a revision of the genera and species from the eastern North Pacific. In: Blake J.A., Hilbig B. & Scott P.H. (eds) Taxonomic Atlas of the Benthic Fauna of the Santa Maria Bassin and Western Santa Barbara Channel. 6 – The Annelida Part 3. Polychaeta: Orbiniidae to Cossuridae. Santa Barbara Museum of Natural History. Santa Barbara.

Blake J.A. 2016. Kirkegaardia (Polychaeta, Cirratulidae), new name for Monticellina Laubier, preoccupied in the Rhabdocoela, together with new records and descriptions of eight previously known and sixteen new species from the Atlantic, Pacific, and Southern Oceans. Zootaxa 4166 (1): 1–93. https://doi.org/10.11646/zootaxa.4166.1.

Blake J.A. 2018. Bitentaculate Cirratulidae (Annelida, Polychaeta) collected chiefly during cruises of the R/V Anton Bruun, USNS Eltanin, USCG Glacier, R/V Hero, RVIB Nathaniel B. Palmer, and R/V Polarstern from the Southern Ocean, Antarctica, and off Western South America. Zootaxa 4537 (1): 1–130. https://doi.org/10.11646/zootaxa.4537.1.1

Blake J.A. & Göransson P. 2015. Redescription of Tharyx killariensis (Southern) from Ireland and description of two new species of Tharyx from the Kattegat, Sweden (Polychaeta, Cirratulidae). Zootaxa 4039 (4): 501–515. https://doi.org/10.11646/zootaxa.4039.4.1

Blake J.A. & Magalhães W.F. 2019. Family Cirratulidae Ryckholt, 1851. In: Westheide W. & Purschke G. (eds) Handbook of Zoology, a Natural History of the Phyla of the Animal Kingdom. Vol. 1 Annelida Basal Groups and Pleistoannelida, Sedentaria I: 339–391, De Gruyter Brill.

Borghese J., Musco L., Arduini D., Tamburello L., Del Pasqua M. & Giangrande A. 2023. A comparative approach to detect macrobenthic response to the conversion of an inshore mariculture plant into an IMTA system in the Mar Grande of Taranto (Mediterranean Sea, Italy). Water 15 (1): 68. https://doi.org/10.3390/w15010068

Caullery M. & Mesnil F. 1898. Les formes épitoques et l’évolution des cirratuliens. Annales de l’Université de Lyon 39: 1–200. Available from https://www.biodiversitylibrary.org/page/49056295 [accessed 11 Jul. 2024].

Eliason A. 1962. Die Polychaeten der Skagerak-Expedition 1933. Zoologiska bidrag från Uppsala 33: 207–293.

Gil J. 2011. The European Fauna of Annelida Polychaeta. PhD Thesis, University of Lisbon, Portugal.

Grosse M., Bakken T., Nygren A., Kongsrud J.A. & Capa M. 2020. Species delimitation analyses of NE Atlantic Chaetozone (Annelida, Cirratulidae) reveals hidden diversity among a common and abundant marine annelid. Molecular Phylogenetics and Evolution 149: e106852. https://doi.org/10.1016/j.ympev.2020.106852

Grosse M., Capa M. & Bakken T. 2021. Describing the hidden species diversity of Chaetozone (Annelida, Cirratulidae) in the Norwegian Sea using morphological and molecular diagnostics. ZooKeys 1039: 139–176. https://doi.org/10.3897/zookeys.1039.61098

Grosse M., Kongsrud J.A., Alvestad T., Eilertsen M.H. & Budaeva N. 2025a. A new species and a new record of Cirratulidae (Annelida, Cirratulida) from Loki’s Castle vent field. European Journal of Taxonomy 987: 1–25. https://doi.org/10.5852/ejt.2025.987.2855

Grosse M., Alvestad T., Nygren A. & Kongsrud J.A. 2025b. Phylogenetic analyses elucidate the identity and distribution of two species of Arctic Cirratulidae (Annelida, Sedentaria). European Journal of Taxonomy 987: 189–220. https://doi.org/10.5852/ejt.2025.987.2869

Grosse M., Nygren A., Meißner K., Struck T., Kongsrud J.A., Alvestad T., Bakken T., Pons J. & Capa M. 2025c. Molecular investigation of Cirratulidae (Annelida) doubles the number of known species in European waters. Zoologica Scripta 54: 672–683. https://doi.org/10.1111/zsc.12729

Hutchings P. & Kupriyanova E. 2018. Cosmopolitan polychaetes – fact or fiction? Personal and historical perspectives. Invertebrate Systematics 32 (1): 1–9. https://doi.org/10.1071/IS17035

Lezzi M., Çinar M.E. & Giangrande A. 2016. Two new species of Cirratulidae (Annelida: Polychaeta) from the southern coast of Italy. Marine Biodiversity 46: 681–686. https://doi.org/10.1007/s12526-015-0418-5

McIntosh W.C. 1911. Notes from the Gatty Marine Laboratory, St. Andrews. No. XXXII. 1. On the American Syllides verrilli, Percy Moore, from Woods Hole, Mass. 2. On Nevaya whiteavesi, a form with certain relationships to Sclerocheilus, Grube, from Canada. 3. On the British Cirratulidae. 4. On the Cirratulidae dredged by the H.M.S. ‘Porcupine’ in 1869 and 1870. 5. On the Cirratulidae dredged in the Gulf of St. Lawrence, Canada, by Dr. Whiteaves. 6. On the Cirratulidae dredged in Norway by Canon Norman, D.C.L., F.R.S. The Annals and Magazine of Natural History. Series 8 7 (38): 145–173. https://doi.org/10.1080/00222931108692919

Oug E., Bakken T., Kongsrud J.A. & Alvestad T. 2017. Polychaetous annelids in the deep Nordic Seas: Strong bathymetric gradients, low diversity and underdeveloped taxonomy. Deep Sea Research Part II: Topical Studies in Oceanography 137: 102–112. https://doi.org/10.1016/j.dsr2.2016.06.016

Read G. & Fauchald K. 2024. WoRMS. World Polychaeta Database. Cirratulidae Ryckholt, 1851. Available from https://www.marinespecies.org/aphia.php?p=taxdetails&id=919 [accessed 11 Jul. 2024].

Ryckholt P. 1851. Mélanges paléontologiques. Part 1. Mémoires Couronnes et Mémoires des Savants etrangers de l’Academie royale des Sciences, des Lettres et des Beaux-Arts de Belgique 24: 1–176. Available from https://www.biodiversitylibrary.org/page/2718124 [accessed 11 Jul. 2024].

Saint-Joseph A.A. 1894. Les Annélides polychètes des côtes de Dinard. Troisième Partie. Annales des Sciences naturelles, Zoologie et Paléontologie, Série 7 17: 1–395. Available from https://www.biodiversitylibrary.org/page/35662416 [accessed 11 Jul. 2024].

Solís-Weiss V., Bertrand Y., Helléouet M.-N. & Pleijel F. 2004. Types of polychaetous annelids at the Muséum national d’Histoire naturelle, Paris. Zoosystema 26 (3): 377–384.

Southern R. 1914. Clare Island Survey. Archiannelida and Polychaeta. Proceedings of the Royal Irish Academy 31 (47): 1–160. Available from https://www.biodiversitylibrary.org/page/34773787 [accessed 11 Jul. 2024].

Webster H.E & Benedict J.E. 1887. The Annelida Chaetopoda, from Eastport, Maine. U.S. Commission of Fish & Fisheries. Report of the United States Commissioner of Fisheries 1885 part 13, II. Appendix to report of commissioner, D.22: 707–758.

Wiley E.O. 1981. Remarks on Willis’ species concept. Systematic Biology 30: 86–87. https://doi.org/10.1093/sysbio/30.1.86

Published
2026-07-16
How to Cite
Grosse, M., Nygren, A., & Capa, M. (2026). Revision of some coastal species of bitentaculate Cirratulidae (Annelida, Cirratulida) from the North-East Atlantic. European Journal of Taxonomy, 1076(1), 1–46. https://doi.org/10.5852/ejt.2026.1076.3304
Section
Research article