MICROPHTHALMUS-SIMPLICICHAETOSUS (ANNELIDA, POLYCHAETA), A NEW HESIONID FROM THE NORTHWESTERN AMERICAN PACIFIC COAST WITH EXCLUSIVELY SIMPLE CHAETAE

Abstract

The new hesionid species, Microphthalmus simplicichaetosus, is described from a sand beach in the Puget Sound, Washington. It differs from the known Microphthalmus species in completely lacking compound neurochaetae. The new species is the fourth Microphthalmus found on the American northwest Pacific coast.