281. Mactrotoma janeiroensis (E. A. Smith, 1915) ★

Bathymetric distribution: 0–75 m —SW.

Geographical distribution: Brazil (AL) to Argentina (San José Gulf)—B/A.

Remarks: Signorelli (2019) refers to this species as Standella (Micromactra) janeiroensis .

References: Smith (1915), Cauqüoin (1967a), Rios (1994, 2009), Signorelli & Pastorino (2012b), Signorelli (2019).