Mediomastus Hartman, 1944

Magalhães, Wagner F. & Bailey-Brock, Julie H., 2012, Capitellidae Grube, 1862 (Annelida: Polychaeta) from the Hawaiian Islands with description of two new species, Zootaxa 3581, pp. 1-52 : 25

Genus Mediomastus Hartman, 1944

Type species: Mediomastus californiensis Hartman, 1944

Diagnosis (after Green 2002). Body small, thread-like. Proboscis papillated. Thorax with 9–11 chaetigers, usually 10. Chaetigers 1–4 with capillary chaetae in both rami. Remaining thoracic and abdominal chaetigers with hooded hooks. Sometimes, paddle-like chaetae may occur in the thorax and sometimes capillary chaetae may occur in notopodia of posterior abdominal segments. Pygidium terminal with mid-ventral caudal cirrus.