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Rhabdocoela (Platyhelminthes) from the Weddell Sea (Antarctica) with the description of eight new species
Artois, T.; Vermin, W.; Schockaert, E. (2000). Rhabdocoela (Platyhelminthes) from the Weddell Sea (Antarctica) with the description of eight new species. Belg. J. Zool. 130(2): 103-110
In: Belgian Journal of Zoology. Koninklijke Belgische Vereniging voor Dierkunde = Société royale zoologique de Belgique: Gent. ISSN 0777-6276; e-ISSN 2295-0451
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| Trefwoorden |
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| Author keywords |
Turbellaria; Rhabdocoela; Typhloplanoida; Trigonostomidae;Eukalyptorhynchia; Polycystididae; Weddell Sea; Antarctica |
| Auteurs | | Top |
- Artois, T.
- Vermin, W.
- Schockaert, E.
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| Abstract |
In this contribution we present eleven species of Rhabdocoela (Platyhelminthes) collected during the Antarktis VII/4 (Epos leg. 3) expedition. Six of them belong to the family Trigonostomidae (Typhloplanoida). Five of these are new to science: Trigonostomum messoplanoides n. sp., Proxenetes trispinosus n. sp., Messoplana globulifera n. sp., M minuta n. sp. and M. spiralis n. sp. AII the species can be recognised from congeneric species by the shapes of their stylets. Ceratopera axi (Riedl, 1954) Den Hartog, 1964 also was found and is discussed brief1y. The other five species belong to the family Polycystididae (Eukalyptorhynchia). Three of them are new to science and belong to the genus Austrorhynchus Karling, 1952 : A. magnificoides n. sp., A. antarcticus n. sp. and A. biserratus n. sp. They differ from other Austrorhynchus species in having a triangular shape of the accessory organ of the male system. Particular differences in shape of the stylet and accessory organ clearly distinguish each of the new species. Unlike the other two species, A. antarcticus lacks a hook on the stylet. The genus Austrorhynchus is brief1y ,discussed. The collected material of Gyratrix hermaphroditus Ehrenberg, 1831 and Porrocystis assimilis (Levinsen, 1879) Karling, 1952 is also brief1y discussed. |
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