Two new “Incertae sedis” syllids (Annelida: Syllidae) from Brazilian oceanic islands

Oceanic islands present very interesting environments, known by possessing relatively distinct fauna and flora. However, taxonomic accounts from Brazilian oceanic islands focused on important groups, such as the family Syllidae, began to be published only in recent years. In this paper we provide descriptions and illustrations of two new species, Brevicirrosyllis sp. nov. from Trindade Islands and Westheidesyllis sp. nov. from Rocas Atoll, two incertae sedis genera previously included in the Eusyllinae subfamily. We also provide updated identification keys for both genera.