2024-03-28T23:41:41Zhttp://digital.csic.es/dspace-oai/requestoai:digital.csic.es:10261/1380492021-12-27T15:51:25Zcom_10261_77com_10261_8col_10261_330
00925njm 22002777a 4500
dc
Capa, María
author
Osborn, Karen J.
author
Bakken, Torkild
author
2016-09-07
Sphaerodoridae (Annelida) is a seeming uncommon and minimally diverse group of polychaetes in the northwestern Atlantic, with only seven species reported from the United States, and none from the eastern coast of Canada, before the present study. Review of the large Smithsonian collection (National Museum of Natural History, Washington) revealed the presence of two morphologically extraordinary undescribed species and added a new record to the north-western Atlantic region. Euritmia carolensis sp. n. is characterised by bearing approximately 20 sessile spherical papillae arranged in three transverse rows per segment, ventrum with 4–6 larger papillae near the parapodial bases and parapodia without papillae; bearing 4–5 simple chaetae that are enlarged subdistally. Sphaerephesia amphorata sp. n. is distinguished from other congeners in the presence of four longitudinal rows of sessile, bottle-shaped macrotubercles with exceptionally long digitiform terminal papilla, and parapodia with four rounded and small papillae, bearing 4–7 compound chaetae, with blades 7–11 times as long as wide. Other encountered species are also herein re-described, including intraspecific variation and updated iconography. Comparison of material also allowed some systematic changes in the group, including the synonymisation of the genus Amacrodorum with Euritmia, and the transfer of Ephesiopsis shivae to Ephesiella. A key to the species reported from the Northwestern Atlantic is provided.
ZooKeys 615: 1-32 (2016)
1313-2989
http://hdl.handle.net/10261/138049
10.3897/zookeys.615.9530
1313-2970
http://dx.doi.org/10.13039/501100000780
27667938
Generic synonymy
Amacrodorum
Ephesiopsis
NW Atlantic
Shelf
Epithelial tubercles
Slope
Sphaerodoridae (Annelida) of the deep Northwestern Atlantic, including remarkable new species of Euritmia and Sphaerephesia