Syllidae (Annelida: Polychaeta) from Indonesia collected by the Siboga (1899-1900) and Snellius II (1984) expeditions

Abstract

Twenty seven samples of syllids (Annelida: Polychaeta) from Indonesia collected during the Siboga Expedition (1899– 1900) and five during the Snellius II Expedition (1984) have been examined. Material from several other museums and Institutions has also been included. Unpublished identifications of Siboga material by Augener have been checked and all specimens have been named according to current taxonomic knowledge. A total of 30 taxa have been identified, belonging to 10 different genera: Branchiosyllis, Haplosyllides, Eusyllis, Odontosyllis, Opisthosyllis, Paraehlersia, Pionosyllis, Sphaerosyllis, Syllis and Trypanosyllis. Four species are described as new: Opisthosyllis mariae, Syllis komodoensis, Syllis villenai and Syllis ypsiloides. One previously synonymised species, Syllis augeneri, is re-described herein as valid. Two more taxa are proposed as new combinations, and four are reported as cf. either due to lack of enough representative specimens or to variability in diagnostic characters or geographical distribution. Finally, two taxa are described but unnamed because of paucity of material. All new species and reports for the area are described and figured.