Capaccioni-Azzati, Romana; Martin, Daniel. (1992). Pseudomastus deltaicus gen. et sp.n. (Polychaeta: Capitellidae) from a shallow water bay in the North-Western Mediterranean Sea. Zoologica Scripta. 21(3): 247-250.
Specimens of Pseudomastus deltaicus gen. et sp.n. (Capitellidae), were collected from muddy bottoms in Els Alfacs Bay (Ebre Delta), a semi-enclosed shallow water area. The main diagnostic characteristics are the possession of 12 thoracic setigers, of which the first 10 have only capillary setae and the last two have capillary notosetae and neuropodial hooded hooks, and presence of branchiae in the abdominal region. Pygidium bearing three anal cirri.