Abstract
Sensiava longiseta gen. et sp. nov. is described from male specimens collected at abyssal depths above the seabed in the Weddell Sea (Southern Ocean). Segmentation and setation of the swimming legs of the new species are typical of the superfamily Clausocalanoidea. Although the new genus shares the presence of sensory setae on the maxilla with the Bradfordian families of the Clausocalanoidea, it does not fit the diagnosis of any of these families. Sensiava longiseta shares with the ancestral group of Bradfordian genera a 1,2,3 setal pattern on the praecoxal endites of the maxilliped and, therefore is provisionally placed within Diaixidae. Sensiava longiseta shows marked asymmetry in the antennule; the right limb is geniculated with ancestral segments XIX–XXIII morphologically modified. The presence of this well pronounced, geniculated antennule is up to now the most striking example of this feature and regarded as an ancestral character in the advanced superfamily Clausocalanoidea.References
Andronov, V.N. (1981) Xantharus formosus gen. et sp. n. (Copepoda, Calanoida) iz severo-zapadnoi Atlantiki. [Xantharus formosus gen. et sp. n. (Copepoda, Calanoida) from the north-west Atlantic]. Zoologicheskii Zhurnal, 60, 1719–1722.
Andronov, V.N. (2002) Veslonogie rachki rodov Diaixis Sars, 1902, Parundinella Fleminger, 1957, Undinella Sars, 1900 i Tharybis Sars, 1902 Copepoda: Calanoida). [The calanoid copepods (Crustacea) of the genera Diaixis Sars, 1902, Parundinella Fleminger, 1957, Undinella Sars 1900 and Tharybis Sars, 1902]. Arthropoda Selecta, 11, 1–80. [in Russian with extensive English summary]
Boxshall, G.A. & Halsey, S.H. (2004) An Introduction to Copepod Diversity. Part I. The Ray Society, London, 421pp.
Bradford, J.M. (1969) New genera and species of benthic calanoid copepods from the New Zealand slope. New Zealand Journal of Marine and Freshwater Research, 3, 473–505.
Bradford, J.M. & Wells, J.B.J. (1983) New calanoid and harpacticoid copepods from beneath the Ross Ice Shelf, Antarctica. Polar Biology, 2, 1–15.
Bradford-Grieve, J.M. (2001) Two species of benthopelagic calanoid copepods of the genus Neoscolecithrix Canu, 1896 s.s. from New Zealand and the segregation of Cenognatha n. gen. New Zealand Journal of Marine and Freshwater Research, 35, 781–793.
Bradford-Grieve, J.M. (2004a) Two new species of Xanthocalanus and the first record of Brachycalanus (Copepoda: Calanoida: Phaennidae) from the upper slope, north-eastern New Zealand. New Zealand Journal of Marine and Freshwater Research, 38, 621–647.
Bradford-Grieve, J.M. (2004b) Deep-sea benthopelagic calanoid copepods and their colonization of the near-bottom environment. Zoological Studies, 43, 276–291.
Brandt, A. & Barthel, D. (1995) An improved supra- and epibenthic sledge for catching Peracarida (Crustacea, Malacostraca). Ophelia, 43, 15–23.
Brandt, A., De Broyer, C., Gooday, A.J., Hilbig, B. & Thomson, M.R.A. (2004) Introduction to ANDEEP (ANtarctic benthic DEEP-sea biodiversity: colonization history and recent community patterns) – a tribute to Howard L. Sanders. Deep-Sea Research 51, 1457–1465.
Brodsky, K.A. (1955) On the fauna of copepods (Calanoida) of the Kurile-Kamchatka Trench. Trudy Instituta Okeanologii Akademii Nauk SSSR, 135, 184–209 [in Russian]
Canu, E. (1896) Résultats Scientifiques de la Campagne du "Caudan" dans le Golfe de Gascogne—Aout-Septembre 1895—par R. Koehler. Copépodes. Annales de l'Université de Lyon, 26, 421–437.
Farran, G.P. (1905) Report on the Copepoda of the Atlantic slope off counties Mayo and Galway. Annual Report Fisheries Ireland 1902–1903. (2), Appendix 2, 23–52.
Ferrari, F.D. & Ivanenko, S. (2001) Interpreting segment homologies of the maxilliped of cyclopoid copepods by comparing stage-specific changes during development. Organisms, Diversity and Evolution, 1, 113–131.
Ferrari, F.D. & Markhaseva, E.L. (1996) Parkius karenwishnerae, a new genus and species of calanoid copepod (Parkiidae, new family) from benthopelagic waters of the eastern tropical Pacific. Proceedings of the Biological Society of Washington, 109 (2), 264–285.
Ferrari, F.D. & Markhaseva, E.L. (2000a) Brachycalanus flemingeri and B. brodskyi, two new copepods (Crustacea: Calanoida: Phaennidae) from benthopelagic waters of the tropical Pacific. Proceedings of the Biological Society of Washington, 113, 1064–1078.
Ferrari, F.D. & Markhaseva, E.L. (2000b) Grievella shanki, a new genus and species of scolecitrichid calanoid copepod (Crustacea) from a hydrothermal vent along the southern East Pacific Rise. Proceedings of the Biological Society of Washington, 113, 1079–1088.
Ferrari, F.D. & Markhaseva, E.L. (2000c) Griceus buskei, a new genus and species of calanoid copepod (Crustacea) from benthopelagic waters off Hawaii. Proceedings of the Biological Society of Washington, 113, 77–87.
Ferrari, F.D. & Markhaseva, E.L. (2005) Three new species of Tharybis (Crustacea: Copepoda: Calanoida: Tharybidae) from benthopelagic waters of the Pacific Ocean. Plankton Biology & Ecology, 52, 33–47.
Fosshagen, A. (1972) Neoscolecithrix farrani Smirnov (Copepoda, Calanoida) from North Norway. Astarte, 5, 1–6.
Giesbrecht, W. (1892) Systematik und Faunistik der pelagischen Copepoden des Golfes von Neapel und der angrenzenden Meeres-Abschnitte. Fauna und Flora des Golfes von Neapel und der angrenzenden Meeres-Abschnitte, 19, 1–831.
Grice, G.D. & Hulsemann, K. (1970) New species of bottom-living calanoid copepods collected in deep water by the DSRV "Alvin". Bulletin of the Museum of Comparative Zoology, 139, 185–230.
Koeller, P.A. & Littlepage, J.L. (1976) Azygokeras columbiae, a new genus and species of marine epibenthic copepod (Calanoida: Aetideidae) from British Columbia. Journal of the Fishery Research Board of Canada, 33, 1547–1552.
Markhaseva, E.L. & Dahms, H.-U. (2004) Plesioscolecithrix (Copepoda, Calanoida, Scolecitrichidae): new genus and new species from the high Antarctic Weddell Sea (Southern Ocean). Sarsia, 89, 326–337.
Markhaseva, E.L. & Ferrari, F.D. (2005) New benthopelagic bradfordian calanoids Crustacea: Copepoda) from the Pacific Ocean with comments on generic relationships. Invertebrate Zoology, 2, 111–168.
Markhaseva, E.L. & Semenova, T.N. (2005) Kirnesius groenlandicus (Copepoda, Calanoida): a new genus and species from the abyssal of the Greenland Sea. Mitteilungen aus dem hamburgischen zoologischen Museum und Institut, 102, 37–49.
Ohtsuka, S., Takeuchi, I. & Tanimura, A. (1998) Xanthocalanus gracilis and Tharybis magna (Copepoda, Calanoida) rediscovered from the Antarctic Ocean with baited traps. Journal of Natural History, 32, 785–804.
Ohtsuka, S., Nishida, S. & Nakaguchi, K. (2002) Three new species of the genus Macandrewella (Copepoda: Calanoida: Scolecitrichidae) from the Pacific Ocean, with notes on distribution and feeding habits. Journal of Natural History, 36, 531–564.
Ohtsuka, S., Boxshall, G.A. & Fosshagen, A. (2003) A new species of Neoscolecithrix (Crustacea; Copepoda; Calanoida) from off Okinawa, southwestern Japan, with comments on the generic position in the superfamily Clausocalanoidea. Bulletin of the National Science Museum, series A, 29, 53–63.
Park, T.S. (1980) Calanoid copepods of the genus Scolecithricella from antarctic and subantarctic waters. Antarctic Research Series, 31, 25–79.
Park, T.S. (1982) Calanoid copepods of the genus Scaphocalanus from antarctic and subantarctic waters. Antarctic Research Series, 34, 75–127.
Park, T. S. (1983a) Calanoid copepods of some scolecithricid genera from antarctic and subantarctic waters. Antarctic Research Series, 38, 165–213.
Park, T. S. (1983b). Calanoid copepods of the family Phaennidae from antarctic and subantarctic waters. Antarctic Research Series, 39, 317–368.
Park, T.S. (1986) Phylogeny of calanoid copepods. Syllogeus, 58, 191–196.
Roe, H.S.J. (1975) Some new and rare species of calanoid copepods from the northeastern Atlantic. Bulletin of the British Museum of Natural History, Zoology, 28, 295–372.
Sars, G.O. (1902) Copepoda: Calanoida. An Account of the Crustacea of Norway, 4, 26–144.
Schulz, K. (1981) Tharybis minor sp. n. (Copepoda: Calanoida: Tharybidae) aus dem nordwestafrikanischen Auftriebsgebiet mit Anmerkungen zur Gattung Tharybis Sars. Mitteilungen aus dem hamburgischen zoologischen Museum und Institut, 78, 169–177.
Schulz, K. (1996) Frigocalanus rauscherti, a new genus and species of hyperbenthic copepod (Calanoida: Clausocalanoidea) from the sublittoral of King George Island (Antarctica). Mitteilungen aus dem hamburgischen zoologischen Museum und Institut, 93, 73–82.
Schulz, K. (1998) A new species of Xantharus Andronov, 1981 (Copepoda: Calanoida) from the mesopelagic zone of the Antarctic Ocean. Helgolaender Meeresuntersuchungen, 52, 41–49.
Schulz, K. (2002) A new species of the hyperbenthic copepod genus Comantenna Wilson, 1924 (Calanoida: Aetideidae) from the eastern Weddell Sea. Mitteilungen aus dem hamburgischen zoologischen Museum und Institut, 99, 101–107.
Schulz, K. (2005) A new species of benthopelagic copepods (Crustacea, Calanoida) from the deep Southern Ocean. Mitteilungen aus dem hamburgischen zoologischen Museum und Institut, 102, 51–70.
Schulz, K. & Beckmann, W. (1995) New benthopelagic tharybids (Copepoda: Calanoida) from the deep North Atlantic. Sarsia, 80, 199–211.
Schulz, K. & Kwasniewski, S. (2004) New species of benthopelagic calanoid copepods from Kongsfjorden (Spitsbergen, Svalbard Archipelago). Sarsia, 89, 143–159.
Schulz, K. & Markhaseva, E.L. (2000) Parabradyidius angelikae, a new genus and species of benthopelagic copepod (Calanoida: Aetideidae) from the deep Weddell Sea (Antarctica). Mitteilungen aus dem hamburgischen zoologischen Museum und Institut, 97, 77–89.
Scott, A. (1909) The Copepoda of the Siboga Expedition. Part. I. Free-swimming, littoral and semi-parasitic Copepoda, Siboga-Expeditie, Monograph, 29a, 1–408.
Scott, T. (1892) Additions to the fauna of the Firth of Forth. Part III. Report of the Fishery Board for Scotland, 10, 244–272.
Scott, T. (1897) The marine fishes and invertebrates of Loch Fyne. Report of the Fishery Board for Scotland, 15, 107–174.
Scott, T. (1909) On some new and rare Entomostraca from the Scottish Seas. Annals and Magazin of Natural History, Zoology, Botany and Geology 3, 122–130.
Vyshkvartzeva, N.V. (2000) Two new genera of Scolecitrichidae and redefinition of Scolecithricella Sars and Amallothrix Sars (Copepoda, Calanoida). Zoosystematica Rossica, 8, 217–241.
Vyshkvartzeva, N.V. (2001) A key to the genera of Scolecitrichidae, with description of a new genus and redescription of two species (Crustacea, Calanoida). Zoosystematica Rossica, 9, 77–98.
Vyshkvartzeva, N.V. (2003) A new bathypelagic copepod Pseudoamallothrix paralaminata sp. n. from the Arctic basin and arguments for transfer of Xanthocalanus soaresmoreirai Bjornberg, 1975 to the genus Pseudoamallothrix (Calanoida: Scolecitrichidae). Zoosystematica Rossica, 12, 39–47.