A new ascidian-dwelling species of Leucothoe Leach, 1814 (Amphipoda: Leucothoidae) from Ilha Grande Bay, Rio de Janeiro state, Brazil.

The Ilha Grande Bay is considered an area of extreme biological importance for the conservation of Brazilian biodiversity. While monitoring the macroinvertebrate ascidian-dwellers around Ilha Grande Bay, an undescribed commensal species of the amphipod family Leucothoidae was discovered. In this paper, we describe the new species of Leucothoe, associated with the ascidiacean Phallusia nigra. [ABSTRACT FROM AUTHOR]