Description of a new genus and species of Chrysopetalidae (Annelida: Polychaeta) from the NE Atlantic, with some further records of related species

  • Ascensão Ravara Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro
  • M. Teresa Aguado Centro de Investigacíon en Biodiversidad y Cambio Global (CIBC-UAM), Departamento de Biologia, Universidad Autónoma de Madrid, Cantoblanco, 28049 Madrid
  • Clara F. Rodrigues Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro
  • Luciana Génio Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro
  • Marina R. Cunha Departamento de Biologia & CESAM, Universidade de Aveiro, 3810-193 Aveiro
Keywords: deep-sea, Bay of Biscay, Horseshoe Abyssal Plain, Gulf of Cadiz, symbiotic species


Five chrysopetalid species are reported from samples collected at bathyal depths in three NE Atlantic regions: the Bay of Biscay, the Horseshoe Abyssal Plain and the Gulf of Cadiz. Arichlidon reyssi (Katzmann et al., 1974), Dysponetus caecus (Langerhans, 1880) and D. profundus Böggemann, 2009 are free-living forms found mainly on biogenic substrates (e.g., coral and sunken wood). A brief description and taxonomical remarks are given for each of these species and their geographical distributions and habitat records were updated accordingly. Natsushima bifurcata Miura & Laubier, 1990 and Craseoschema thyasiricola gen. et sp. nov. are symbionts inhabiting the mantle cavity of chemosynthesis-based bivalves known from four mud volcanoes from the Gulf of Cadiz. Craseoschema thyasiricola gen. et sp. nov. was found inside a thyasirid bivalve and presents mixed morphological characteristics of free-living and symbiotic forms within Calamyzinae Hartmann-Schröder, 1971. A full description of the new species is given together with DNA sequences of the genes COI, 16S and H3 that were used in a phylogenetic analysis to indicate the position of the new genus within the family.


Aguado M.T. & Rouse G. 2011. Nautiliniellidae (Annelida) from Costa Rican cold seeps and a western Pacific hydrothermal vent, with description of four new species. Systematics and Biodiversity 9 (2): 109–131.

Aguado M.T., Nygren A. & Rouse G. 2013. Two apparently unrelated groups of symbiontic annelids, Nautiliniellidae and Calamyzidae (Phyllodocida, Annelida), are a clade of derived chrysopetalid polychaetes. Cladistics 29: 610–628.

Aguirrezabalaga F., Altuna A., Arraras M. D., Miguel I., Romero A., Ruiz de Ocenda M. J., San Vicente D. & Ibañez M. 1986. Contribucion al conocimiento de la fauna marina en la costa vasca. IV. Lurralde 9: 133–158.

Becker E.L., Cordes E.E., Macko S.A., Lee R.W. & Fisher C.R. 2013. Using stable isotope compositions of animal tissues to infer trophic interactions in Gulf of Mexico lower slope seep communities. PLoS ONE 8: e74459.

Böggemann M. 2009. Polychaetes (Annelida) of the abyssal SE Atlantic. Organisms Diversity & Evolution 9 (4–5): 252–428. Available from [accessed 5 Jul. 2019].

Carr C.M., Hardy S.M., Brown T.M., Macdonald T.A. & Hebert P.D.N. 2011. A tri-oceanic perspective: DNA barcoding reveals geographic structure and cryptic diversity in Canadian polychaetes. PLoS ONE 6: e22232.

Colgan D.J., Ponder W.F. & Eggler P.E. 2000. Gastropod evolutionary rates and phylogenetic relationships assessed using partial 28S rDNA and histone H3 sequences. Zoologica Scripta 29 (1): 29–63.

Cunha M.R., Matos F.L., Génio L., Hilário A., Moura C.J., Ravara A. & Rodrigues C.F. 2013a. Are organic falls bridging reduced environments in the deep sea? – Results from colonization experiments in the Gulf of Cadiz. PLoS One 8 (10): e76688.

Cunha M.R., Rodrigues C.F., Génio L., Hilário A., Ravara A. & Pfannkuche O. 2013b. Macrofaunal assemblages from mud volcanoes in the Gulf of Cadiz: abundance, biodiversity and diversity partitioning across spatial scales. Biogeosciences 10: 2553–2568.

Dahlgren T.G. & Pleijel F. 1995. On the generic allocation of Chrysopetalum caecum Langerhans, 1880 (Polychaeta, Chrysopetalidae). Mitteilungen aus dem Hamburgischen Zoologischen Museum und Institut 92: 159–173. Available from [accessed 5 Jul. 2019].

Dahlgren T.G., Glover A.G., Baco A. & Smith C.R. 2004. Fauna of whale falls: systematics and ecology of a new polychaete (Annelida: Chrysopetalidae) from the deep Pacific Ocean. Deep-Sea Research I 51: 1873–1887.

Dreyer J., Miura T. & Van Dover C.L. 2004. Vesicomyicola trifurcatus, a new genus and species of commensal polychaete (Annelida: Polychaeta: Nautiliniellidae) found in deep-sea clams from the Blake Ridge cold seep. Proceedings of the Biological Society of Washington 117 (1): 106–113. Available from [accessed 5 Jul. 2019].

Hensen C., Scholz F., Nuzzo M., Valadares V., Gràcia E., Terrinha P., Liebetrau V., Kaul N., Silva S., Martínez-Loriente S., Bartolome R., Piñero E., Magalhães V.H., Schmidt M., Weise S.M., Cunha M., Hilário A., Perea H., Rovelli L. & Lackschewitz K. 2015. Strike-slip faults mediate the rise of crustal-derived fluids and mud volcanism in the deep sea. Geology 43 (4): 339–342.

Jimi N., Moritaki T. & Kajihara H. 2019. Polychaete meets octopus: symbiotic relationship between Spathochaeta octopodis gen. et sp. nov. (Annelida: Chrysopetalidae) and Octopus sp. (Mollusca: Octopodidae). Systematics and Biodiversity 17 (1): 1–6.

Katoh K., Misawa K., Kuma K. & Miyata T. 2002. MAFFT: a novel method for rapid multiple sequence alignment based on fast Fourier transform. Nucleic Acids Research 30: 30593066. Available from [accessed 5 Jul. 2019].

Katzmann W., Laubier L. & Ramos J. 1974. Une nouvelle espèce Mediterranéenne de Chrysopetalidae (Annélides Polychètes). Annalen des Naturhistorischen Museums in Wein 78: 313–317.

Kück P. & Longo G.C. 2014. FASconCAT-G: extensive functions for multiple sequence alignment preparations concerning phylogenetic studies. Frontiers in Zoology 11: e81.

Langerhans P. 1880. Die Wurmfauna Madeiras. II. Zeitschrift für wissenschaftliche Zoologie 33 (1−2): 271−316. Available from [accessed 5 Jul. 2019].

Laubier L. 1964. Contribution à la faunistique du coralligène. VI. Présence de Chrysopetalum caecum Langerhans dans l’endofaune coralligène. Vie et Milieu 15 (1): 125–138.

Martin D. & Britayev T.A. 1998. Symbiotic polychaetes: review of known species. Oceanography and Marine Biology: An Annual Review 36: 217−340. Available from [accessed 5 Jul. 2019].

Martin D. & Britayev T.A. 2018. Symbiotic polychaetes revisited: an update of the known species and relationships (1998−2017). Oceanography and Marine Biology: An Annual Review 56: 371−448. Available from [accessed 5 Jul. 2019].

Miura T. & Hashimoto J. 1996. Nautiliniellid polychaetes living in the mantle cavity of bivalve molluscs from cold seeps and hydrothermal vents around Japan. Publications of the Seto Marine Biological Laboratory 37 (3−6): 257−274. Available from [accessed 5 Jul. 2019].

Miura T. & Laubier L. 1990. Nautiliniellid polychaetes collected from the Hatsushima cold-seep site in Sagami Bay with descriptions of new genera and species. Zoological Science 7: 319−325. Available from [accessed 5 Jul. 2019].

Oliver G., Rodrigues C.F. & Cunha M.R. 2011. Chemosymbiotic bivalves from the mud volcanoes of the Gulf of Cadiz, NE Atlantic, with descriptions of new species of Solemyidae, Lucinidae and Vesicomyidae. Zookeys 113: 1−38.

Ravara A., Cunha M.R. & Rodrigues C. 2007. The occurrence of Natsushima bifurcata (Polychaeta: Nautiliniellidae) in Acharax hosts from mud volcanoes in the Gulf of Cadiz (south Iberian and north Moroccan margins). Scientia Marina 71 (1): 95−100. Available from [accessed 5 Jul. 2019].

Read G. & Fauchald K. (eds) 2018. World Polychaeta Database. Chrysopetalidae Ehlers, 1864. Available from [accessed 9 Apr. 2018].

Rodrigues C.F., Oliver P.G. & Cunha M.R. 2008. Thyasiroidea (Mollusca: Bivalvia) from the mud volcanoes of the Gulf of Cadiz (NE Atlantic). Zootaxa 1752: 41−56. Available from [accessed 5 Jul. 2019].

Rodrigues C.F., Hilário A. & Cunha M.R. 2013. Chemosymbiotic species from the Gulf of Cadiz (NE Atlantic): distribution, life styles and nutritional patterns. Biogeosciences 10: 2569−2581.

Rullier F. 1964. Résultats scientifiques des campagnes de la “Calypso“. Campagne aux îles du Cap Vert 1959. Annélides polychètes. Annales de l’Institut océanographique 41: 113–218.

San Martín G. 2004. Familia Chrysopetalidae Ehlers, 1864. In: Viéitez J.M., Alós C., Parapar J., Besteiro C., Moreira J., Nuñez J., Laborda J. & San Martín G. (eds) Fauna Ibérica. Vol. 25: 105−209. Museo Nacional de Ciencias Naturales, CSIC, Madrid.

Sellanes J., Quiroga E. & Neira C. 2008. Megafauna community structure and trophic relationships at the recently discovered Concepción Methane Seep Area, Chile, ~36º S. ICES Journal of Marine Science 65 (7): 1102−1111.

Sjölin E., Erséus C. & Källersjö M. 2005. Phylogeny of Tubificidae (Annelida, Clitellata) based on mitochondrial and nuclear sequence data. Molecular Phylogenetics and Evolution 35 (2): 431−441.

Stamatakis A. 2014. RAxML version 8: a tool for phylogenetic analysis and post-analysis of large phylogenies. Bioinformatics 30: 1312−1313.

Stamatakis A., Hoover P. & Rougemont J. 2008. A rapid bootstrap algorithm for the RAxML web servers. Systematic Biology 57: 758−771.

Turner R.D. 1978. Wood, mollusks and deep-sea food chains. Bulletin of the American Malacological Union (1977): 13−19.

Watson C. & Faulwetter S. 2017. Stylet jaws of Chrysopetalidae (Annelida). Journal of Natural History 51: 2863–2924.

Watson C., Chivers A.J. Narayanaswamy B.E., Lamont P. & Turnewitsch R. 2014. Chrysopetalidae (Annelida: Phyllodocida) from the Senghor Seamount, north-east Atlantic: taxa with deep-sea affinities and morphological adaptations. Memoirs of Museum Victoria 71: 311−325.

Watson C., Carvajal J.I., Sergeeva N.G., Pleijel F. & Rouse G.W. 2016. Free-living calamyzin chrysopetalids (Annelida) from methane seeps, anoxic basins, and whale falls. Zoological Journal of the Linnaen Society 177 (4): 700−719.

Watson Russell C. 1997. Patterns of growth and setal development in the deep-sea worm, Strepternos didymopyton (Polychaeta: Chrysopetalidae). Bulletin of Marine Science 60 (2): 405−426. Available from [accessed 5 Jul. 2019].

Watson Russell C. 1998. Description of Arichlidon new genus and two new species from Australia; Bhawania reyssi redescribed and assigned to Arichlidon (Chrysopetalidae: Polychaeta). The Beagle, Records of the Northern Territory Museum of Arts and Sciences 14: 159−176.

Watson Russell C. 2000a. Family Chrysopetalidae. In: Beesley P.L., Ross G.B. & Glasby C.J. (eds) Polychaetes and Allies: The Southern Synthesis: 121–125. CSIRO Publishing, Melbourne.

Watson Russell C. 2000b. Description of a new species of Arichlidon (Chrysopetalidae: Polychaeta) from the West Atlantic and comparison with the East Atlantic species Arichlidon reyssi. Bulletin of Marine Science 67 (1): 465−477. Available from [accessed 5 Jul. 2019].

Watson Russell C. 2001. New genus and species of Chrysopetalidae (Polychaeta) from hydrothermal vents (south-western Pacific). The Beagle, Records of the Northern Territory Museum of Arts and Sciences 17: 57–66.

Wiklund H., Glover A.G., Johannessen P.J. & Dahlgren T.G. 2009. Cryptic speciation at organic-rich marine habitats: a new bacteriovore annelid from whale-fall and fish farms in the North-East Atlantic. Zoological Journal of the Linnean Society 155 (4): 774−785.

How to Cite
Ravara, A., Aguado, M. T., Rodrigues, C. F., Génio, L., & Cunha, M. R. (2019). Description of a new genus and species of Chrysopetalidae (Annelida: Polychaeta) from the NE Atlantic, with some further records of related species. European Journal of Taxonomy, (539).