Fabia byssomiae (Say, 1818)

Pinnotheres byssomiae Say, 1818: 451 .

Material examined. Brazil, São Paulo: 1 ♂, CCDB 6434, Ubatuba, Ilha das Couves, coll. D. Alves, i.2019 .

Distribution. Western Atlantic—USA (Florida), Cuba, Brazil (Rio de Janeiro, São Paulo, Paraná, Santa Catarina, Rio Grande do Sul), and Argentina (Melo 1996, 1998, 2008; Felder et al. 2009; Alves et al. 2012a).

Remarks. Previous records to São Paulo include Ilha Vitória (Alves et al. 2012a). This species presents a truncated taxonomic history (see Almeida et al. 2010 for details), since it was previously referred as Fabia insularis (Melo, 1971), Pinnotheres emiliai (Martins & D’Incao 1996), and other combinations. It is always found associated with bivalves of the genera Glycymeris and Anadara (Melo 2008) . Sequence accession number (GenBank): CCDB 6434—16S (MT849289) (present study).