Pinnixa White 1846

Female Pinnixa tubicola, found intertidally at March Point, Padilla Bay, by Sarah Bewley and Melissa Moxey along with terebellind tubeworms. Carapace width 7 mm. (Photo by: Dave Cowles, June 2012)

This closeup of the chelipeds shows the tooth on the inner margin of the dactyl

The legs are flattened, translucent with darker spots or reticulations, and are fringed with long, abundant plumose setae. It can also be seen that the dactyls and the propodus of the walking legs are of approximately equal length (though the dactyls are mostly extended downward in this photo and may appear shorter), and that the dactyls are nearly straight. Notice that the last leg is much shorter than the others.

This view of the underside shows how much lighter the abdomen is, and also reveals that this individual is a female.

Pinnixa eburna, carapace width 7 mm wide by 3.5 mm long. Found in a burrow of Abarenicola pacifica on the mudflats of Padilla Bay. (Photo by: Dave Cowles, June 2009)

The dactyl tips of the walking legs are curved.

There is no rostrum and no teeth between the eyes, and the outer margins of the eye sockets are rounded.

Here is another individual, with a bit more setae than the one above. This one is likely a female (not the same one as below), from Tresus capax. Photo by Dave Cowles, July 2008

Pinnixa faba, likely a male, from the mantle cavity of Tresus capax. Scale in background = mm (Photo by: Dave Cowles, July 2005)