Moreira, J.; Parapar, J. (2012). Two new species of Sphaerodoropsis Hartman & Fauchald, 1971 (Polychaeta: Sphaerodoridae) from Iceland (BIOICE programme). Marine Biology Research. 8(7): 584-593.

163273

10.1080/17451000.2011.638929 [view]

Moreira, J.; Parapar, J.

2012

8(7): 584-593

Publication

World Polychaeta Database (WPolyD)

Two new species of Sphaerodoropsis Hartman & Fauchald, 1971 (Polychaeta: Sphaerodoridae), collected during the BIOICE programme on sedimentary bottoms off Iceland, are described. Sphaerodoropsis gudmunduri sp. nov. is a shelf species (<400 m) chiefly characterized by having one transverse row of up to 10-12 dorsal macrotubercles per chaetiger ('Sphaerodoropsis group 2') and body papillae present only on the prostomium, peristomium, parapodia and ventral surface. It also has up to 7-9 ventral papillae per chaetiger arranged following a non-random pattern and parapodia which bear one digitiform prechaetal lobe, 1-4 papillae and compound unidentate chaetae with blades with thin spinulation along their cutting edge. Sphaerodoropsis halldori sp. nov. has been found in deeper waters (>1000 m) and may be distinguished mostly by having up to 13 dorsal macrotubercles arranged in two transverse rows (6-7 macrotubercles, respectively) defining a zig-zag pattern ('group 3') and 7 dorsal papillae per chaetiger, up to 8-10 ventral papillae per chaetiger arranged in a non-random pattern and parapodia which bear one digitiform prechaetal lobe, one antero-lateral papilla and compound unidentate chaetae with blades with thin spinulation along their cutting edge. Both species show sexual dimorphism characterized by different arrangements of modified ventral cirri and/or special ventral structures in some mid-body chaetigers; a brief discussion about the presence of these structures on sphaerodorids and their possible importance on the systematics of the family is provided.

North Atlantic

Polychaeta

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