h Vol. 79, pp. 95-108 23 May 1966 PROCEEDINGS OF THE BIOLOGICAL SOCIETY OF WASHINGTON HETERAPHRODITA ALTONI, A NEW GENUS AND SPECIES OF POLYCHAETE WORM (POLYCHAETA, APHRODITIDAE ) FROM DEEP WATER OFF OREGON, AND A REVISION OF THE APHRODITID GENERA By Marian H. Pettibone Division of Worms, Smithsonian Institution Among some polychaetes collected off the mouth of the Columbia River, Oregon, by Mr. Miles S. Alton, were 11 speci-mens of a species of Aphroditidae collected at a single deep-water station in 900 fathoms. The aphroditid is herein described as a new species belonging to a new genus. I have taken this opportunity to review the genera in the family. Two genera, Pontogenia Claparede and Laetmonice Kinberg, have been emended and several others have been put into synonymy. In the diagnosis of the Aphroditidae and key to the genera, as herein revised, I have included neither Triceratia Haswell, based on the indeterminable and perhaps incomplete T. araeoceras Haswell, 1883, from Australia nor Hermionopsis Seidler, based on the doubtful H. levisetosa Seidler, 1923, from Kerguelen. This study was aided in part by a grant from the National Science Foundation (NSF GB-1269). FAMILY APHRODITIDAE Diagnosis: Body relatively large, short and broad, ovate, oblong, or spindle-shaped; flattened ventrally, arched dorsally; consisting of few segments (less than 60). Ventral surface of body and parapodia covered with minute spherical or conical papillae. Prostomium suboval, with single median antenna, comprised of ceratophore and terminal filament, and pair of long palps. Usually with a well-developed papillated facial tubercle ventral to median antenna and anterior to mouth. Peristomium consisting of first few segments around mouth. First or tentacular seg-ment projecting laterally and ventrally to prostomium, with 2 pairs of tentacular cirri; vmiramous setigerous lobes with numerous capillary setae. 14_Proc. Biol. Soc. Wash., Vol. 79, 1966 (95) SMITHSOf
Heteraphrodita altoni, a new genus and species of polychaete worm (Polychaeta, Aphroditidae) from deep water off Oregon, and a revision of the aphroditid genera
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