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Unidentified Pleurobranchid
#3
 
Unidentified Pleurobranchid #3
Maximum size:  about 28 mm.

Identification:  This is a pale peach animal that may appear white in ambient light. It has a weakly pustulate notum and may be distinguished from Berthella stellata by its lack of translucent-white reticulation.

Natural history:  Unidentified pleurobranchid #3 is known from a single animal found in a lava tube at a depth of 8 m (25 ft).

Distribution:  Big Island.

Taxonomic notes:  Perhaps, this is a second Berthellina sp.? (Note 1) Alternatively, there's a chance that it might turn out to be a very pale Berthelina delicata. It was first recorded in Hawaii at "Kei Kei Caverns," Kohala Coast, Big Island by David Rafalovich on Aug. 1, 2013.

Photo:  David Rafalovich: about 28 mm: "Kei Kei Caverns," Kohala Coast, Big Island; Aug. 1, 2013.

Observations and comments:

Note 1:  By process of elimination, it's possible that this is the animal that "goes with" the shells illustrated as Unidentified Pleurobranchid #2. However, we're listing them separately pending an opportunity for direct comparison.
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