The geographic distribution of echiurans in the Atlantic Ocean (Phylum Echiura) Author Biseswar, Ramlall text Zootaxa 2009 2222 17 30 journal article 10.5281/zenodo.190138 5a2b24d7-5527-4650-96a4-1404035191d2 1175-5326 190138 Subfamily Echiurinae Description. Proboscis long and truncate. Two rings of anal setae at posterior end of trunk. Post-pharyngeal diaphragm almost divides coelom in two. Gonostomal lips not spirally coiled.