Abstract
Sampling in shallow sediments of Bay of Biscay up to 70 m has yielded three undescribed capitellids. Mediomastus biscayensis sp. nov. is distinct from its congeners by a combination of characters that includes the presence of bilimbate thoracic capillaries, thoracic and abdominal hooks similar in shape and length and distinct Methyl Green staining pattern with chaetigers 5–9 having sparse green speckles and chaetigers 10–11 with dense green speckles. Notomastus hutchingsae sp. nov. is a very distinct Notomastus species because of the presence of two achaetous segments in the thoracic region and the shape of the thoracic segments with a constriction after segment 4, and after segment 6 segments becoming distinctly separated and bi-annulated. The newly proposed Peresiella ellae sp. nov. is most similar to its Atlantic congener P. spathulata Ewing, 1984 by the absence of eyespots and presence of modified spatulate chaetae on chaetiger 4–11, but differing by the presence of two peristomial annuli, shape of thoracic and abdominal segments, number of spatulate chaetae per tori and dentition of hooded hooks. All species are fully described, illustrated and commented on according to their closest congeners.
References
- Allen, E.J. (1915) Polychaeta of Plymouth and the South Devon coast including a list of the Archiannelida. Journal of the Marine Biological Association of the United Kingdom, 10, 592–646. https://doi.org/10.1017/S002531540000919X
- Bachelet, G. & Dauvin, J.C. (1993) Distribution quantitative de la macrofaune benthique des sables intertidaux du bassin d'Arcachon. Oceanologica Acta, 16, 83–97.
- Blake, J.A. (2000) Chapter 4. Family Capitellidae Grube, 1862. In: Blake, J.A., Hilbig, B. & Scott, P.V. (Eds.), Taxonomic Atlas of the Benthic Fauna of the Santa Maria Basin and Western Santa Barbara Channel. Vol. 7. Annelida Part 4. Polychaeta: Flabelligeridae to Sternaspidae. Santa Barbara Museum of Natural History, Santa Barbara, California, pp. 47–96.
- Capaccioni-Azzati, R. (1985) Sobre la presencia de Mediomastus fragilis Rasmussen, 1973 (Polychaeta, Capitellidae) en el Mediterráneo. Investigaci6n Pesquera, 49, 47–53.
- Claparède, É. (1864) Glanures zootomiques parmi les annélides de Port-Vendres (Pyrénées Orientales). Mémoires de la Société de Physique et d'Histoire Naturelle de Genève, 17 (2), 463–600. https://doi.org/10.5962/bhl.title.14827
- Claparède, É. (1870) Les Annélides Chétopodes du Golfe de Naples. Supplément. Mémoires de la Société de physique et d'histoire naturelle de Genève, 20 (2), 365–542. https://doi.org/10.5962/bhl.title.2142
- Day, J.H. (1955) The Polychaeta of South Africa. Part 3. Sedentary species from Cape shores and estuaries. Journal of the Linnean Society of London, Zoology, 42 (287), 407–452. https://doi.org/10.1111/j.1096-3642.1955.tb02216.x
- Day, J.H. (1961) The Polychaet Fauna of South Africa. Part 6. Sedentary species dredged off Cape coasts with a few new records from the shore. Journal of the Linnean Society of London, 44 (299), 463–560. https://doi.org/10.1111/j.1096-3642.1961.tb01623.x
- Eisig, H. (1887) Monographie der Capitelliden des Golfes von Neapel und der angrenzenden meeres-abschnitte nebst untersuchungen zur vergleichenden anatomie und physiologie. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeres-Abschnitte, 16, 1–906. https://doi.org/10.5962/bhl.title.11542
- Ewing, R.M. (1984) Generic revision of Mastobranchus and Peresiella (Polychaeta: Capitellidae) with descriptions of two new species from the Gulf of Mexico and Atlantic Ocean. Proceedings of the Biological Society of Washington, 97 (4), 792–800.
- Fabricius, O. (1780) Fauna Groenlandica, systematice sistens animalia groenlandiae occidentalis hactenus indagata, quoad nomen specificium, triviale, vernaculumque, synonyma auctorum plurimum, descriptionem, locum, victum, generationem, mores, usum capturamque singuli, pro ut detegendi occasio fuit, maximaque parte secundum proprias observationes. Ioannis Gottlob Rothe, Hafniae and Lipsiae, 452 pp. https://doi.org/10.5962/bhl.title.13489
- Fauvel, P. (1907) Première note préliminaire sur les Polychètes provenant des campagnes de l'Hirondelle et de la Princesse-Alice ou déposées dans le Musée Océanographique de Monaco. Bulletin de l'Institute océanographique, 107, 1–34.
- Fauvel, P. (1913) Quatrième note préliminaire sur les Polychètes provenant des campagnées de l’Hirondelle et de la Princesse-Alice, ou deposées dans le Musée Océanographique de Monaco. Bulletin de l’Institut Océanographique de Monaco, 270, 1–80.
- Fauvel, P. (1927) Polychètes sédentaires. Addenda aux errantes, Arachiannélides, Myzostomaires. Faune de France Vol. 16. Paul Lechevalier, Paris, 494 pp.
- García-Garza, M.E. & de León-González, J.A. (2015) The genus Notomastus (Polychaeta: Capitellidae) in the Gulf of California, Mexico, with the description of three new species. Proceedings of the Biological Society of Washington, 128 (2), 176–189. https://doi.org/10.2988/0006-324X-128.2.176
- García-Garza, M.E., de León-González, J.A. & Tovar-Hernández, M.A. (2019) Catalogue of Notomastus M. Sars, 1851 (Annelida, Capitellidae) and the description of a new species from the Gulf of California. Zootaxa, 4577 (2), 249–273. https://doi.org/10.11646/zootaxa.4577.2.2
- Green, K.D. (2002) Capitellidae (Polychaeta) from the Andaman Sea. Phuket Marine Biological Center Special Publication, 24, 249–343.
- Grube, A.E. (1850) Die Familien der Anneliden. Archiv für Naturgeschichte, Berlin, 16 (1), 249–364.
- Grube, A.E. (1862) Noch ein Wort über die Capitellen und ihre Stelle im Systeme der Anneliden. Archiv für Naturgeschichte, Berlin, 28 (1), 366–378.
- Harmelin, J.-G. (1968) Note sur trois Capitellidae (Annélides Polychètes) récoltés en Méditerranée, avec description d'un nouveau genre: Peresiella. Recueil des Travaux de la Station Marine d' Endoume, 43 (59), 253–259.
- Hartman, O. (1944) Polychaetous annelids from California, including the descriptions of two new genera and nine new species. Allan Hancock Pacific Expeditions, 10 (2), 239–307.
- Hartman, O. (1947) Polychaetous annelids. Part VII. Capitellidae. Allan Hancock Pacific Expeditions, 10 (4), 391–481.
- Hartman, O. (1961) Polychaetous annelids from California. Allan Hancock Pacific Expeditions, 25, 1–226.
- Hartmann-Schröder, G. (1965) Zur Kenntnis des Sublitorals der chilenischen Küste unter besonderer Berücksichtigung der Polychaeten und Ostracoden. II Die Polychaeten des Sublittorals. Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut, 62 (Supplement), 59–305.
- Hutchings, P.A. & Rainer, S. (1982) Designation of a neotype of Capitella filiformis Claparède, 1964, type species of the genus Heteromastus (Polychaeta: Capitellidae). Records of the Australian Museum, 34 (4), 373–380. https://doi.org/10.3853/j.0067-1975.34.1982.295
- Keferstein, W. (1862) Untersuchungen über niedere Seethiere. Zeitschrift für wissenschaftliche Zoologie, 12 (1), 1–147. https://doi.org/10.5962/bhl.title.47031
- Langerhans, P. (1880) Die Wurmfauna von Madeira. III. Zeitschrift für wissenschaftliche Zoologie, 34 (1), 87–143.
- Lin, J., Wang, J. & Zheng, F. (2018) Mediomastus chinensis sp. nov., a new species of Capitellidae (Annelida: Polychaeta) from the southeast coast of China. Acta Oceanologica Sinica, 37 (10), 126–129. https://doi.org/10.1007/s13131-018-1316-z
- Magalhães, W.F. & Bailey-Brock, J.H. (2012) Capitellidae Grube, 1862 (Annelida: Polychaeta) from the Hawaiian Islands with description of two new species. Zootaxa, 3581 (1), 1–52. https://doi.org/10.11646/zootaxa.3581.1.1
- Magalhães, W.F. & Blake, J.A. (2020) 7.6.4 Capitellidae Grube, 1862. In: Purschke, G., Böggemann, M. & Westheide, W. (Eds.), Handbook of Zoology, Annelida, 2 (Pleistoannelida, Sedentaria II), pp. 349–403. https://doi.org/10.1515/9783110291681-011
- Mesnil, F. (1897) Note sur un capitellidien nouveau (Capitellides n.gen., giardi n.sp.). Zoologischer Anzeiger, 20, 441–443.
- de Montaudouin, X. & Sauriau, P.G. (2000) Contribution to a synopsis of marine species richness in the Pertuis Charentais Sea with new insights in soft-bottom macrofauna of the Marennes-Oléron Bay. Cahiers de Biologie Marine, 41, 181–222.
- Pillai, T.G. (1961) Annelida Polychaeta of Tambalagam Lake, Ceylon. Ceylon Journal of Science (Biological Sciences), 4 (1), 1–40.
- Read, G. & Fauchald, K. (Ed.) (2023) World Polychaeta Database. Capitellidae Grube, 1862. Available from: https://www.marinespecies.org/polychaeta/aphia.php?p=taxdetails&id=921 (accessed 27 November 2023)
- Saint-Joseph, A. (1906) Les Annélides Polychètes des côtes de France (Océan et côtes de Provence). Annales des sciences naturelles, Paris, Series 9, 3, 145–258.
- Sars, M. (1851) Beretning om i Sommeren 1849 Fortagen Zoologisk Reise i Lofoten og Finmarken. Nyt Magazin Naturvidenskaberne, 6 (2), 121–211.
- Silva, C.F. & Amaral, A.C.Z. (2022) Capitellidae (Annelida) from the Brazilian Continental Margin (SW Atlantic): new occurrences of three genera and description of new species. Zootaxa, 5104 (1), 89–110. https://doi.org/10.11646/zootaxa.5104.1.5
- Tomioka, S., Hiruta, S.F. & Kajihara, H. (2013) Description of Mediomastus opertaculeus sp. nov. (Annelida: Capitellidae) from Hokkaido, northern Japan. Species Diversity, 18 (1), 105–110. https://doi.org/10.12782/sd.18.1.105
- Tomioka, S., Nishi, E. & Kajihara, H. (2014) Two new species of Mediomastus (Annelida, Capitellidae) from Tokyo Bay, Japan. Zookeys, 422, 115–126. https://doi.org/10.3897/zookeys.422.7501
- Warren, L.M. (1976) A review of the genus Capitella (Polychaeta Capitellidae). Journal of Zoology, 180, 195–205. https://doi.org/10.1111/j.1469-7998.1976.tb04673.x
- Warren, L.M., Hutchings, P.A. & Doyle, S. (1994) A revision of the genus Mediomastus Hartman, 1944 (Polychaeta: Capitellidae). Records of the Australian Museum, 46 (3), 227–256. https://doi.org/10.3853/j.0067-1975.46.1994.6