Polydora cornuta Bosc., 1802 (= P. l i g n i Webster, 1880)

Type species for the genus.

Type locality: Charleston Harbour, South Carolina, USA.

Type material: Lost. Neotype: USNM 98587 designated by Blake and Maciolek (1987).

Location and author of most recently described material: Canada Atlantic coast, USA Atlantic Coast, USA Pacific coast, Gulf of Mexico, Brazil, Argentina, Germany (North Sea), Romania (Black Sea), Russia (Sea of Japan), Korea (Yellow Sea), Taiwan (Taiwan Province), off Mainland China (Fuchien Province) (Radashevsky 2005); Australian material not examined.

Recorded distribution: Australia: Victoria, New South Wales (in prep.).

East west, and gulf coasts of North America; Caribbean Sea; Argentina; northern and southern Europe; China; Korea; Japan; India; Brazil; the gulf coast of Mexico; Pacific coast of Russia; Black Sea.