Unknown polychaete A

Unknown Polychaete A

Size under dissecting microscope: ~200µm
Size under compound microscope: same
Small nectochaete larva, generally found at the two-chaetiger stage. Chaetae about as long as the body is wide, angled toward the posterior end. No prostomial appendages or jaws. This group has been present in sampling prior to the 2005-2006 eruptions at 9°N, EPR, but was not distinguished from other unknown polychaetes. It may be a smaller version of a member of our nectochaete group, but because of consistent differences in morphology and color, we have listed it separately.
Pump EPR 1999-2000: Not distinguished from other unknown polychaetes
Pump EPR 2004: Not distinguished from other unknown polychaetes

Can be confused with

Ophryotrocha sp. is similar in general outline, but is larger (this two-chaetiger specimen is 280µm). In Ophryotrocha the parapodia stick straight out to the sides rather than being angled back to the posterior and it also has a jaw apparatus visible through the body wall. Unknown Polychaete A tends to be yellow or tan in color when preserved in ethanol rather than gray to white like Ophryotrocha.

Go to:
Gastropods by Size
Gastropods by Species
Other Taxa