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Pleurobranchus
mamillatus
Quoy & Gaimard, 1832
 
Pleurobranchus mamillatus
Maximum size:  ( )

Identification:  This is a large species with tall, conical tubercles that may be largely retracted. There are irregular arcs or circles of small flattened tubercles surrounding the bases of the larger ones. All, or most, animals have bright violet-white spots on the notum, a trait that distinguishes them from Pleurobranchus grandis.

Natural history:  Pleurobranchus mamillatus has been dredged from about 100 m (328 ft) and photographed from HURL submersibles at 92-289 m (302-948 ft).

Distribution:  Maui, Molokai, Oahu, St. Rogatien Bank, Raita Bank and Pioneer Bank: widely distributed in the Indo-Pacific.

Taxonomic notes:  It was first recorded in Hawaii from Oahu by Terry Gosliner. It's misspelled in some sources as "Pleurobranchus mammalatus".

Photo:  Terry Gosliner: dredged from about 100 m (328 ft); Oahu.

Observations and comments:

Note 1:  ( )
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