299. Sphenia fragilis (H. Adams & A. Adams, 1854)

Bathymetric distribution: 0–2 m —SW.

Geographical distribution: USA (Georgia) to Brazil (CE to SC), Uruguay, Argentina; also, Eastern Pacific— WGD.

References: Domaneschi (1984), Narchi & Domaneschi (1993a), Rios (1994, 2009), Domaneschi & Narchi (1998), Coan (1999b), Barroso et al. (2013a).