Cyclopoida Siphonostoma (Crustacea) von Banyuls (Frankreich, Pyrénées-Orientales) mit besonderer Berücksichtigung des Gast-Wirtverhältnisses

The sponges, Clathrina clathrus, Cl. lacunosa, Cl. primordialis, and Cl. contorta, as well as Oscarella lobularis, have been checked on the presence of associated siphonostome cyclopoids. Two new species have been found, Asterocheres simplex n. sp. and A. corneliae n. sp. Moreover, the hitherto unknown males of Asterocheres complexus and A. mucronipes have been described. Six species have been found on new hosts, for three species the hitherto unknown host has been discovered (Rhynchomyzon falco on Acontiophorus antennatus Clathrina contorta, on Cl. lacunosa and on Oscarella lobularis, Myzopontius pungens on Cl. primordialis and on Cl. contorta). Furthermore, evidence is provided that certain species of siphonostomes are predominantly found on certain hosts. So, it can be said that Asterocheres simplex frequents Clathrina clathrus and Cl. lacunosa, that Myzopontius pungens frequents Clathrina contorta, and that Asterocheres mucronipes frequents Oscarella lobularis. Asterocheres corneliae is most abundant on Clathrina primordialis, but on the same host one finds also numerous Myzopontius pungens. Finally, a list of all known hosts for siphonostomes is provided, based on an extensive (though certainly not complete) search in the literature.