Cossuridae
Prostomium without appendages but a single filamentous dorsal palp is present on an anterior segment ; these are usually retained after all but the roughest sample treatment. Setae are simple but have fine serrations.
Prostomium without appendages but a single filamentous dorsal palp is present on an anterior segment ; these are usually retained after all but the roughest sample treatment. Setae are simple but have fine serrations.