A new genus and five new species of acoel flatworms, found in marine sediments on San Juan Island, Washington, are described. These are: Ancylocirrus gen. nov. ornatus sp. nov. (Convolutidae); Haploposthia erythrocephala sp. nov. (Haploposthiidae); Mecynostomum torquens sp. nov., Eumecynostomum luridum sp. nov. (Mecynostomidae); Notocelis rubidocula sp. nov. (Otocelididae). Raphidophallus (Convolutidae) is removed from synonymy under Conaperta. Parotocelis luteopunctata (Otocelididae), described from the Galcpagos Islands, is transferred to Posticopora gen. nov., because the genus of which it is the type species is preoccupied. Notocelis gullmarensis subsp. maculata (Otocelididae), found in Hawaii, is raised to the rank of species. |
