Abstract
Argestes angolaensis sp. nov. (Copepoda, Argestidae) is described from the Angola Basin. Detailed comparison with the other Argestes species, A. mollis Sars, 1910 and A. reductus (Itô, 1983), which are redescribed in the present contribution, reveals autapomorphies for the genus, finally enabling the characterization of Argestes as a monophylum: 1) body densely covered with fine small cuticular spinules, 2) sensilla of cephalothorax and free thoracic somites arising from long tubercles, 3) antennula with very strong seta terminally on 6th segment in female (9th–10th in male). This investigation, concentrating on the systematic status of Argestes and first remarks on its relationships to Parargestes Lang, is the first in a series dedicated to the phylogeny of Argestidae Por, 1986.
References
Balzer, W., J. Alheit, K.-C. Emeis, H.U. Lass & M. Türkay (eds.) (2006) METEOR-Berichte 06-5. SouthEast Atlantic. Cruise No. 48, 6 July–3 November 2000, Walvis Bay – Walvis Bay. Leitstelle METEOR, Institut für Meereskunde der Universität Hamburg, 219 pp.
Bodin, P. (1997) Catalogue of the new marine harpacticoid Copepods. Documents de travail de l'Institut royal des Sciences naturelles de Belgique, Bruxelles, 304 pp.
Boxshall, G.A. & Halsey, S.H. (2004) An introduction to copepod diversity Vol. I and II. Ray Society Publications 166, London, 966 pp.
Fiers, F. (1987) Intercletodes interita n. gen., n. sp. and Orthopsyllus coralliophilus n. sp., two new copepods from the northern coast of Papua New Guinea (Copepoda, Harpacticoida). Bulletin de L’Institut Royal des Sciences Naturelles de Belgique, 57, 123–132.
George, K.H. (2004) Description of two new species of Bodinia, a new genus incertae sedis in Argestidae Por, 1986 (Copepoda, Harpacticoida), with reflections on argestid colonization of the Great Meteor Seamount plateau. Organisms, Diversity & Evolution, 4(4), 241–264.
George, K.H. (2006) New Ancorabolinae Sars, 1909 (Copepoda: Harpacticoida: Ancorabolidae) of the Atlantic Ocean. Description of Pseudechinopsyllus sindemarkae gen. et sp. nov. and Dorsiceratus ursulae sp. nov. from the Great Meteor Seamount, and redescription of D. octocornis Drzycimski, 1967, and D. triarticulatus Coull, 1973 (part.). Meiofauna Marina, 15, 123–156.
Gurney, R. (1932) British Fresh-Water Copepoda, 2. The Ray Society, London, 336 pp.
Huys, R. & Conroy-Dalton, S. (1997) Discovery of hydrothermal vent Tantulocarida on a new genus of Argestidae (Copepoda: Harpacticoida). Cahiers de Biologie Marine, 38, 235–249.
Huys, R.; Gee, J.M.; Moore, C.G. & Hamond, R. (1996) Marine and Brackish Water Harpacticoid Copepods, Part 1. Synopses of the British Fauna (New Series) 51, 1–352.
Itô, T. (1983) Harpacticoid copepods from the Pacific abyssal off Mindanao. II. Cerviniidae (cont.), Thalestridae, and Ameiridae. Publications of Seto Marine Biology Laboratory 28 (1/4), 151–254.
Lang, K. (1936a) Die Familie der Cletodidae Sars, 1909. Zoologische Jahrbücher, Abteilung 68/6, 445–480.
Lang, K. (1936b) Die während der schwedischen Expedition nach Spitzbergen 1898 und nach Grönland 1899 eingesammelten Harpacticiden. Kungl. Svenska Vetenskapsakademiens Handlingar., Ser. 3, 15/4, 1–55.
Lang, K. (1944) Monographie der Harpacticiden (Vorläufige Mitteilungen). Almqvist & Wiksells Boktryckeri Ab, Uppsala, 39 pp.
Lang, K. (1948) Monographie der Harpacticiden. Otto Koeltz Science Publishers, Königstein (reprint 1975), 1683 pp.
Por, F.D. (1986) A re-evaluation of the family Cletodidae Sars, Lang (Copepoda, Harpacticoida). Syllogeus, 58, 420–425.
Rose, A.; Seifried, S.; Willen, E.; George, K.H.; Veit-Köhler, G.; Bröhldick, K.; Drewes, J.; Moura, G.; Martínez Arbizu, P. & Schminke, H.K. (2005) A method for comparing within-core alpha-diversity values from repeated multicorer samplings, shown for abyssal Harpacticoida (Crustacea: Copepoda) from the Angola Basin. Organisms, Diversity & Evolution, 5 (suppl. 1), 3–17.
Sars, G.O. (1910) Copepoda Harpacticoida. Parts XXIX & XXX. Tachidiidae (concluded), Metidae, Balaenophilidae, supplement (part). An Account of the Crustacea of Norway, with short descriptions and figures of all the species. Bergen Museum, Bergen 5, 337–368, pls. 225–230, suppl. pls. 1–10.
Sars, G.O. (1921). Copepoda Supplement. Parts IX & X. Harpacticoida (concluded), Cyclopoida.. An Account of the Crustacea of Norway, with short descriptions and figures of all the species. Bergen Museum, Bergen 7, 93–121, pls. 65–76.
Seifried, S. (2003) Phylogeny of Harpacticoida (Copepoda): Revision of „Maxillipedasphalea“ and Exanechentera. Cuvillier Verlag Göttingen, 259 pp.
Wells, J.B.J. (1965) Copepoda (Crustacea) from the meiobenthos of some Scottish marine sub-littoral muds. Proceedings of the Royal Society of Edinburgh, Section B, Biological Sciences, 69/1, 1–33.
Wells, J.B.J. (1985) Keys to aid in the identification of marine harpacticoid copepods. Zoology Publications from Victoria University of Wellington, 80, 1–19.
Willen, E. (1996) Pseudomesochra T. Scott, 1902 as a member of the Paranannopidae Por, 1986 (Copepoda, Harpacticoida) with a description of three new species. Senckenbergiana maritima, 28, 81–109.