Two new species of terebellid polychaetes are described, from material collected from the intertidal zone to 45 m deep off the State of São Paulo, southeastern Brazil. The thelepodine
Pseudostreblosoma brevitentaculatum sp. nov., is characterised by short, distally expanded tentacles, the presence of a mid-ventral lobe on segment 1 and short lateral lobes on segments 2–4, and by the arrangement of branchial filaments. The species is compared to both other known species of the genus. The terebelline
Phisidia rubra sp. nov. differs from its congeners by its smaller size, and by having up to four eyespots at each lateral margin of prostomium, close to the mouth, about 5 rows of secondary teeth above uncinial main fang, uncini arranged in double rows on segments 11–20, 14 pairs of notopodia and by anterior segments being dorsally inflated.
Phisidia rubra sp. nov. is compared to its closest congeners and a table comparing all known species of
Phisidia is provided.
