ABSTRACT
CONTENTS Introduction ............................................................................................................................................ 277 Materials and Methods .......................................................................................................................... 278 Results .................................................................................................................................................... 280 Discussion .............................................................................................................................................. 280
Carazziella hobsonae Blake, 1979 .............................................................................................. 284 Prionospio perkinsi Maciolek, 1985............................................................................................ 284 Paraprionospio pinnata (Ehlers, 1901) ....................................................................................... 284 Streblospio gynobranchiata Rice and Levin, 1998 ..................................................................... 289 Prionospio heterobranchia Moore, 1907..................................................................................... 289 Apoprionospio pygmaea (Hartman, 1961)................................................................................... 289 Spio pettiboneae Foster, 1971...................................................................................................... 289 Prionospio steenstrupi Malmgren, 1867 ..................................................................................... 290 Scolelepis texana Foster, 1971 and Scolelepis squamata (O. F. Müller, 1806) ......................... 290 Dipolydora socialis (Schmarda, 1861) ........................................................................................ 290 Polydora cornuta Bosc, 1802 and Polydora websteri Hartman, 1943 ....................................... 291
Conclusions ............................................................................................................................................ 291 Acknowledgments.................................................................................................................................. 292 References .............................................................................................................................................. 292
The polychaete family Spionidae is one of most ubiquitous benthic taxa (Fauchald, 1977; Johnson, 1984; Blake, 1996). This family is dominated by many cosmopolitan species (Foster, 1971; Johnson, 1984; Herrando-Perez et al., 2001) that tolerate a wide salinity range from tidal freshwater to hypersaline marine conditions (Foster, 1971; Taylor, 1971).
