and Peresiella spathulata
. Emended diagnoses for these genera are proposed. Two species currently assigned to Mastobranchus
, M. dollfusi
Fauvel, 1936, and M. indicus
Southern, 1921, are considered incertae sedis. Keys to the species of Mastobranchus
Eisig, 1887, and Peresiella
Harmelin, 1968, are presented.
Two new species of capitellid polychaetes from the Gulf of Mexico and Atlantic Ocean are described: