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Two new species of Cossura (Cossuridae, Annelida) from the terminal lobes of the Congo River deep-sea fan

Published online by Cambridge University Press:  15 February 2017

Anna Zhadan
Anna Zhadan*
Affiliation:
Biological Faculty, M.V. Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow 19421, Russia
*
Correspondence should be addressed to: A. Zhadan, Biological Faculty, M.V. Lomonosov Moscow State University, Leninskie Gory 1-12, Moscow 19421, Russia email: [email protected]
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Abstract

Two new species of Cossura Webster & Benedict, 1887 were found in material collected during sampling from the terminal lobes of the Congo deep-sea fan. They were described using light and scanning electron microscopy. Cossura platypus sp. nov. has 15–17 thoracic chaetigers, a prostomium longer than it is wide, with a widely rounded anterior margin, an abruptly expanded posterior prostomial ring the same length as the peristomium, without a mid-ventral notch, a branchial filament attached to the midlength of chaetiger 3, and a pygidium with three anal cirri. Cossura platypus sp. nov. is similar to C. brunnea Fauchald, 1972 but differs in the shape of the prostomium, which is widely rounded anteriorly in C. platypus sp. nov. and is broadly triangular in C. brunnea; furthermore, C. platypus sp. nov.is uniformly pale, whereas C. brunnea has dark pigmentation. Cossura candida Hartman, 1955 differs from C. platypus sp. nov. in the conical shape of the prostomium and 24–35 thoracic chaetigers. Cossura flabelligera sp. nov. has 16–19 thoracic chaetigers, a conical prostomium, and a branchial filament arising from the posterior part of chaetiger 2; the entire body, including the chaetae, is covered by a thick mucous sheath similar to the tunic of flabelligerids. Cossura flabelligera sp. nov. resembles C. longocirrata Webster & Benedict, 1887 in the position of the branchial filament, the shape of the prostomium, and the number of thoracic chaetigers; it differs in having a thick mucous sheath. This character seems to be unique for the Cossuridae.

Keywords

AnnelidapolychaetesCossuridaeCossuraCossura platypusCossura flabelligeraWest AfricaCongo lobesdeep sea fan
Type
Research Article
Information
Journal of the Marine Biological Association of the United Kingdom , Volume 97 , Special Issue 5: Proceedings of the 12th International Polychaete Conference Amgueddfa Cymru - National Museum Wales Cardiff, Wales, UK, 1-5 August 2016 , August 2017 , pp. 881 - 888
Copyright
Copyright © Marine Biological Association of the United Kingdom 2017 

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Footnotes

Zoobank identifier:LSID urn:lsid:zoobank.org:pub:ED1510A9-8963-4B97-9F2F-B2E201526098

References

REFERENCES

Day, J.H. (1967) A monograph on the Polychaeta of Southern Africa. Part 2. Sedentaria. Trustees of the British Museum (Natural History), London 2, 459–878.Google Scholar
Fauchald, K. (1972) Benthic polychaetous annelids from deep water off western Mexico and adjacent areas in the Eastern Pacific Ocean. Allan Hancock Monographs in Marine Biology 7, 1–575.Google Scholar
Fournier, J.A. and Petersen, M.E. (1991) Cossura longocirrata: redescription and distribution, with notes on reproductive biology and a comparison of described species of Cossura (Polychaeta: Cossuridae). Ophelia Supplement 5, 63–80.Google Scholar
Hartman, O. (1955) Endemism in the North Pacific Ocean, with emphasis on the distribution of marine annelids, and descriptions of new or little known species. In Essays in the natural sciences in honor of Captain Allan Hancock. Los Angeles, CA: University of Southern California Press, pp. 39–57.Google Scholar
Hilbig, B. (1996) Family Cossuridae Day, 1963. In Blake, J.A. Hilbig, B. and Scott, P.H. (eds) Taxonomic atlas of the benthic fauna of the Santa Maria basin and Western Santa Barbara channel. 6 – the Annelida part 3. Polychaeta: orbiniidae to cossuridae. Santa Barbara, CA: Santa Barbara Museum of Natural History, pp. 385–402.Google Scholar
Kitamori, R. (1960) Two new species of cirratulid and Nephthydidae (Annelida: Polychaeta). Bulletin of the Japanese Society for Scientific Fisheries 26, 1082–1085.CrossRefGoogle Scholar
Lange, G., Darr, A. and Zettler, M.L. (2014) Macrozoobenthic communities in waters off Angola. African Journal of Marine Science 36, 313–321.Google Scholar
Orensanz, J.M. (1976) Los anélidos poliquetos de la provincia biogeográfica Argentina. IX. Poecilochaetidae y Cossuridae. Comunicaciones Zoológicas del Museo de Historia Natural de Montevideo 10, 1–8.Google Scholar
Rabouille, C., Olu, K., Baudin, F., Khripounoff, A., Dennielou, B., Arnaud, H.S., Babonneau, N., Bayle, C., Beckler, J., Bessette, S., Bombled, B., Bourgeois, S., Brandily, C., Caprais, J-C., Cathalot, C., Charlier, K., Corvaisier, R., Croguennec, C., Cruaud, P., Decker, C., Droz, L., Gayet, N., Godfroy, A., Hourdez, S., Le Bruchec, J., Le Saout, J., Lesaout, M., Lesongeur, F., Martinez, P., Mejanelle, L., Michalopoulos, P., Mouchel, O., Noel, P., Pastor, L., Picot, M., Pignet, P., Pozzato, L., Pruski, A.M., Rabiller, M., Raimonet, M., Ragueneau, O., Reyss, J.L., Rodier, P., Ruesch, B., Ruffine, L., Savignac, F., Senyarich, C., Schnyder, J., Sen, A., Stetten, E., Sun, M-Y., Taillefert, M., Teixeira, S., Tisnerat-Laborde, N., Toffin, L., Tourolle, J., Toussaint, F., Vetion, G., Jouanneau, J.M. and Bez, M. (2016) The Congolobe project, a multidisciplinary study of Congo deep-sea fan lobe complex: overview of methods, strategies, observations and sampling. Deep Sea Research Part II: Topical Studies in Oceanography. http://dx.doi.org.10.1016.j.dsr2.2016.05.006.Google Scholar
Reish, D.J. (1958) Description of a new species of Cossura (Annelida: Polychaeta) from the Mississippi Delta. Journal of the Washington Academy of Sciences 48, 53–55.Google Scholar
Tamai, K. (1986) Two new species of Cossura (Polychaeta, Cossuridae) from Western Japan. Bulletin of the National Science Museum, Tokyo, Series A 12, 155–161.Google Scholar
Webster, H.E. and Benedict, J.E. (1887) The Annelida Chaetopoda, from Eastport, Maine. United States Commission on Fish and Fisheries. Part 13. Report to the Commissioner of Fisheries 1885, 707–755.Google Scholar
Zhadan, A. (2015) Cossuridae (Annelida: Polychaeta: Sedentaria) from Australian and adjacent waters: the first faunistic survey. Records of the Australian Museum 67, 1–24.Google Scholar