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- Willems, Wim, et al.
(författare)
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Meiofauna of the Koster-area, results from a workshop at the Sven Lovén Centre for Marine Sciences (Tjärnö, Sweden)
- 2009
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Ingår i: Meiofauna Marina. - : Pfeil. - 1611-7557. ; 17, s. 1-34
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Tidskriftsartikel (refereegranskat)abstract
- During a two-week workshop held at the Sven Lovén Centre for Marine Sciences on Tjärnö, an island on the Swedish west-coast, meiofauna was studied in a large variety of habitats using a wide range of sampling tech- niques. Almost 100 samples coming from littoral beaches, rock pools and different types of sublittoral sand- and mudflats yielded a total of 430 species, a conservative estimate. The main focus was on acoels, proseriate and rhabdocoel flatworms, rotifers, nematodes, gastrotrichs, copepods and some smaller taxa, like nemertodermatids, gnathostomulids, cycliophorans, dorvilleid polychaetes, priapulids, kinorhynchs, tardigrades and some other flatworms. As this is a preliminary report, some species still have to be positively identified and/or described, as 157 species were new for the Swedish fauna and 27 are possibly new to science. Each taxon is discussed separately and accompanied by a detailed species list.
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- Willems, Wim R., et al.
(författare)
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First report on Rhabdocoela (Rhabditophora) from deep parts of Skagerrak, with the description of four new species
- 2007
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Ingår i: Zootaxa. - 1175-5326 .- 1175-5334. ; :1616, s. 1-21
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Tidskriftsartikel (refereegranskat)abstract
- In this contribution we report on 13 species of Rhabdocoela, found during a marine inventory of Skagerrak by the Swedish Taxonomy Initiative. Four new species are described, two of which are Kalyptorhynchia (Gnathorhychidae and Polycystididae) and two belong to Dalytyphloplanoida (Solenopharyngidae). Uncinorhynchus vorago sp. nov., (Gnathorhynchidae) has a triangular stylet consisting of a double-folded plate, which proximally forms a tube, but without a distal, needle-shaped tip. Austrorhynchus artoisi sp. nov. ( Polycystididae), has two prostate stylets. Prostate stylet type II consists of a distal tube and a short proximal funnel, which has a stirrup-shaped ornament, whereas the stylet type III shows an unpronounced foot and style connected to each other by a narrow clasp and a comb-bearing plate. The foot and plate are connected to a thread-like flagellum. Lenopharynx bathos sp. nov. (Solenopharyngidae) resembles Lenopharynx tubatus Schockaert & Martens, 1985, but differs in the detailed structure of the stylet and by the lack of colouration and eyes. Proceropharynx profundum sp. nov. has a unique combination of small spines and hard ridges on the cirrus. Additional data are given for the remaining nine species, three of which are new for the Swedish fauna. Espegrendia norvegica Westblad, 1954 ( Solenopharyngidae) is redescribed. For the sake of completeness, two more species are mentioned. One is identified as a new species of Acrumena Brunet, but lack of material prevents its formal description. The second one is probably a representative of the taxon Ceratopera Den Hartog, but cannot be identified with certainty because of the poor quality of the preserved material. This contribution is one of very few reports on Rhabdocoela collected from a depth exceeding 100 m and some preliminary biogeographical remarks are therefore given.
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