W. Vervoort

Species of Staurotheca Allman, 1888 (Cnidaria: Hydrozoa) from recent antarctic expeditions with R. V. Polarstern, with the description of six new species

Thirteen species of the genus Staurotheca Allman, six of which are new to science, have been studied. The material originates from the Weddell Sea region and was collected by several antarctic expeditions with the R. V. Polarstern. Each species is described and figured and its systematic position among allied species discussed. Current data concerning autecology and geographical distribution of each species are discussed. Re-definitions of the genera Staurotheca Allman and Thuiaria Fleming are presented. The species formerly referred to the genus Selaginopsis Allman and found in the southern hemisphere are included in Staurotheca, while the northern ones are sunk in Thuiaria.

On the species of Filellum Hincks, 1868 (Cnidaria: Hydrozoa) with the description of a new species

The species of the genus Filellum Hincks have been reviewed and a species new to science, Filellum disaggregatum sp. nov., is described and figured, the coppinia of this species being much different from those of the other members of the genus. The coppinia of Filellum serratum Clarke, hitherto unknown from the Mediterranean Sea, is also described and figured. A key for the identification of the species of the genus is also presented.

Species of Symplectoscyphus Marktanner-Turneretscher, 1890 (Cnidaria: Hydrozoa, Sertulariidae) from recent Antarctic expeditions with R.V. Polarstern , with the description of four new species

Fifteen species of the genus Symplectoscyphus Marktanner-Turneretscher have been studied, four of which are new to science (Symplectoscyphus anae sp. nov., S. frigidus sp. nov., S. sofiae sp. nov. and S. weddelli sp. nov.). The material studied originates from the Weddell Sea and was collected by several French and German Antarctic expeditions with R.V. Polarstern. Each species is described and figured, the systematic position amongst allied species discussed and available data concerning autecology and geographical distribution given. The type material of five poorly known species of Symplectoscyphus, S. aggregatus (Jäderholm), S. cumberlandicus (Jäderholm), S. glacialis (Jäderholm), S. hero Blanco and S. plectilis (Hickson and Gravely), has been re-examined, re-described and figured. Finally, a general survey of the bathymetrical and biogeographical distribution of the known Antarctic species is given.

Two new species of Staurotheca Allman, 1888 (Cnidaria, Hydrozoa, Sertulariidae) from the Scotia Sea (Antarctica)

Abstract Two new species of the genus Staurotheca Allman, 1888 have been studied (Staurotheca cornuta sp. nov. and Staurotheca multifurcata sp. nov). The material, from the Scotia Ridge area (Antarctica), was collected in 1986/1987 by the Spanish Antarctic expedition “Antártida 8611”. Each species is described and figured, and its systematic position among allied species is noted. Data concerning autecology and geographical distribution for each species are given. A comparative table listing the main features of the known species of the genus is included. Finally, a general survey of the geographical and bathymetrical distribution of the known species of the genus is presented.

Hydroids of the family Halopterididae (Cnidaria, Hydrozoa) collected in the western pacific by various French expeditions

Ansín Agís J., Vervoort W. & Ramil F. 2009. — Hydroids of the family Halopterididae (Cnidaria, Hydrozoa) collected in the western pacific by various French expeditions. Zoosystema 31 (1): 33-61. ABSTRACT This paper is the second result of the study of large collections of Plumularioidea (Cnidaria, Hydrozoa, Leptolida), collected in the seas surrounding New Caledonia, in the Philippines and in Indonesian waters by French expeditions. A total of 13 species belonging to the genera Antennella (five species), Cladoplumaria (one species), Halopteris (four species), Monostaechas (two species) and Corhiza (one species) are described or mentioned in the present report; most of which are illustrated. Three new species, Antennella sinuosa n. sp., Antennella megatheca n. sp. and Corhiza pauciarmata n. sp. are described and another, Halopteris concava (Billard, 1911) is recorded for the first time since the original description. Two species, Antennella sp. and Monostaechas sp. are only identified to the genus level.

Hydroids of the families Kirchenpaueriidae Stechow, 1921 and Plumulariidae McCrady, 1859 (Cnidaria, Hydrozoa) collected in the Western Pacific Ocean by various French Expeditions

ABSTRACT This publication is the third in a series of accounts on large collections of Plumularioidea McCrady, 1859 (Cnidaria, Hydrozoa, Hydroidolina) obtained during several French expeditions to the Philippines region, Vanuatu, New Caledonia, Fiji, and the Marquesas Islands. Additional material from Mozambique was also examined and is discussed. A total of 17 species, belonging to the families Kirchenpaueriidae Stechow, 1921 (two species) and Plumulariidae McCrady, 1859 (15 species), are scrutinized and illustrated in the present report. Three new species of the genus Plumularia Lamarck, 1816 are described (Plumularia bathyale n. sp., Plumularia contraria n. sp., Plumularia pseudocontraria n. sp.). The name Plumularia milsteinae n. nom., is proposed for Plumularia spiralis Milstein 1976, a permanently invalid junior homonym of Plumularia spiralis Billard, 1911. Polyplumaria kossowskae (Billard, 1911) is recorded for the first time since its original description. Two species of Plumularia are identified only to the genus level. Type materials of Plumularia habereri Stechow, 1909 and Dentitheca hertwigi Stechow, 1909, and the syntypes of all varieties of Plumularia habereri described by Billard (1913), have also been examined.