Fig. 1. Taxonomic characters used in identification of North American 

 freshwater polychaetes. Nereidae a-f: a- Dorsal view anterior end with 

 proboscis everted; b- Uniramous parapodium; c- Biramous parapodium; d- 

 Pharynx, dorsal and ventral views; e- Spiniger; f- Falciger. Sabellidae 

 g-h: g- Capillary seta; h- Hook. Serpulidae i-j : i- Capillary seta; j- 

 Hook. 



nt-notopodium; nr-neuropodium; Ig-ligules; ph-pharynx; j-jaw; pg-paragnath; 

 o-oral ring; m-maxillary ring. 



