pp 003-268 03-01-2007 08:16 Pagina 3 Atlantic Leptolida (Hydrozoa, Cnidaria) of the families Aglaopheniidae, Halopterididae, Kirchenpaueriidae and Plumulariidae collected during the CANCAP and Mauritania-II expeditions of the National Museum of Natural History, Leiden, the Netherlands CANCAP-project. Contributions, no. 125 J. Ansín Agís, F. Ramil & W. Vervoort Ansín Agís, J., F. Ramil & W. Vervoort. Atlantic Leptolida (Hydrozoa, Cnidaria) of the families Aglaopheniidae, Halopterididae, Kirchenpaueriidae and Plumulariidae collected during the CAN- CAP and Mauritania-II expeditions of the National Museum of Natural History, Leiden, the Nether- lands. Zool. Verh. Leiden 333, 29.vi.2001: 1-268, figs 1-97.— ISSN 0024-1652/ISBN 90-73239-79-6. J. Ansín Agís & F. Ramil, Depto de Ecoloxía e Bioloxía Animal, Universidade de Vigo, Spain; e-mail addresses: [email protected] & [email protected]. W. Vervoort, National Museum of Natural History, Leiden, The Netherlands; e-mail: vervoort@natu- ralis.nnm.nl. Key words: Cnidaria; Hydrozoa; Leptolida; Aglaopheniidae; Halopterididae; Kirchenpaueriidae; Plumulariidae; north-eastern Atlantic; geographical distribution. Forty-six species of the superfamily Plumularioidea (Hydrozoa, Cnidaria) and some material identi- fied to the generic level, collected by the CANCAP and Mauritania-II expeditions of the Rijkmuseum van Natuurlijke Historie (now Nationaal Natuurhistorisch Museum) in the period 1976-1988, are described, as well as two other species that were used in the present study. In addition to the descrip- tions, synonymy, variability and geographical distribution are discussed; autoecological data and measurements are also presented. The new species described here are: Aglaophenia svobodai spec. nov., Streptocaulus caboverdensis spec. nov., S. chonae spec. nov., Antennella confusa spec. nov. and Nemertesia anonyma spec. nov. All species are figured. The general classification used follows Bouillon (1985, 1995); nomenclature on the species level is as used by Svoboda & Cornelius (1991), Ramil & Vervoort (1992a, 1992b), Calder (1997) and Schuchert (1997). The material originates from the seas and coasts around the Azores, Madeira, Selvagens, Canary Islands and Cape Verde Islands, as well as the Atlantic off Morocco and Mauritania, at depths varying between 0 and 4000 m. All species discussed have a wider, usually Atlantic distribution, with the exception of Streptocaulus pulcherrimus Allman, 1883, endemic in the Cape Verde area and Nemertesia belini Bedot, 1916, known only from the Azores and Cape Verde Islands. Contents Introduction ............................................................................................................................. 5 List of the stations ................................................................................................................... 6 Taxonomic review ................................................................................................................ 26 Family Aglaopheniidae ....................................................................................................... 26 Genus Aglaophenia Lamouroux, 1812 .......................................................................... 26 Aglaophenia acacia Allman, 1883 ............................................................................. 26 Aglaophenia kirchenpaueri (Heller, 1868) ................................................................ 30 Aglaophenia latecarinata Allman, 1877 ................................................................... 35 Aglaophenia lophocarpa Allman, 1877 ..................................................................... 40 pp 003-268 03-01-2007 08:16 Pagina 4 4 Ansín Agís et al. Atlantic Leptolida. Zool. Verh. Leiden 333 (2001) Aglaophenia octodonta (Heller, 1868) ...................................................................... 48 Aglaophenia parvula Bale, 1882 ................................................................................ 53 Aglaophenia picardi Svoboda, 1979 ......................................................................... 57 Aglaophenia pluma (Linnaeus, 1758) ....................................................................... 60 Aglaophenia trifida L. Agassiz, 1862 ....................................................................... 65 Aglaophenia tubulifera (Hincks, 1861) ..................................................................... 68 Aglaophenia svobodai spec. nov. .............................................................................. 73 Aglaophenia spec. ...................................................................................................... 78 Genus Cladocarpus Allman, 1874 .................................................................................. 80 Cladocarpus alatus Jarvis, 1922 ................................................................................ 80 Genus Gymnangium Hincks, 1874 ................................................................................ 83 Gymnangium sinuosum (Fraser, 1925) .................................................................... 83 Genus Lytocarpia Kirchenpauer, 1872 .......................................................................... 86 Lytocarpia distans (Allman, 1877) ........................................................................... 86 Lytocarpia myriophyllum (Linnaeus, 1758) ............................................................. 88 Genus Macrorhynchia Kirchenpauer, 1872 ................................................................ 100 Macrorhynchia philippina (Kirchenpauer, 1872) .................................................. 100 Genus Nematophorus Clarke, 1879 .............................................................................. 104 Nematophorus clarkei (Nutting, 1900) ................................................................... 104 Genus Streptocaulus Allman, 1883 .............................................................................. 108 Streptocaulus corneliusi (Ramil & Vervoort, 1992) .............................................. 108 Streptocaulus dollfusi (Billard, 1924) ..................................................................... 112 Streptocaulus pectiniferus (Allman, 1883) ............................................................. 115 Streptocaulus pulcherrimus Allman, 1883 ............................................................. 119 Streptocaulus sinuosus (Vervoort, 1966) ............................................................... 124 Streptocaulus caboverdensis spec. nov. .................................................................. 127 Streptocaulus chonae spec. nov. ............................................................................. 133 Family Halopterididae ....................................................................................................... 135 Genus Antennella Allman, 1877 .................................................................................. 135 Antennella campanulaformis (Mulder & Trebilcock, 1909) ................................. 135 Antennella secundaria (Gmelin, 1791) ................................................................... 140 Antennella siliquosa (Hincks, 1877) ....................................................................... 145 Antennella confusa spec. nov. ................................................................................ 149 Genus Halopteris Allman, 1877 ................................................................................... 152 Halopteris alternata (Nutting, 1900) ...................................................................... 152 Halopteris carinata Allman, 1877 ........................................................................... 156 Halopteris catharina (Johnston, 1833) .................................................................... 159 Halopteris diaphana (Heller, 1868) ......................................................................... 163 Halopteris polymorpha (Billard, 1913) ................................................................... 167 Genus Monostaechas McCrady, 1859 .......................................................................... 171 Monostaechas quadridens (McCrady, 1859) .......................................................... 171 Family Kirchenpaueriidae ................................................................................................. 175 Genus Kirchenpaueria Jickeli, 1883 .............................................................................. 175 Kirchenpaueria bonnevieae (Billard, 1906) ............................................................. 175 Kirchenpaueria halecioides (Alder, 1859) ............................................................... 179 Kirchenpaueria pinnata (Linnaeus, 1758) .............................................................. 183 pp 003-268 03-01-2007 08:16 Pagina 5 Ansín Agís et al. Atlantic Leptolida. Zool. Verh. Leiden 333 (2001) 5 Family Plumulariidae ........................................................................................................ 189 Genus Monotheca Nutting, 1900 ................................................................................. 189 Monotheca margaretta Nutting, 1900 .................................................................... 189 Genus Nemertesia Lamouroux, 1812 .......................................................................... 193 Nemertesia antennina (Linnaeus, 1758) ...............................................................