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Onchidium verruculatum
(Cuvier, 1830)
 
Onchidium verruculatum
Maximum size:  about 35 mm.

Identification:  This is a grayish-black slug-like animal with a dorsal surface covered by variably sized tubercles. They resemble land slugs in that their eyes are on the tips of stalks.

Natural history:  Onchidium verruculatum is a common species in the high intertidal on rocky shorelines and on overhanging kiawi branches. It's nocturnal and feeds on micro-algae.

Distribution:  Maui, Oahu and Kauai.

Taxonomic notes:  It's listed as Peronia sp. in Edmondson, 1946 and referred to as the "warty slug" in Hoover, 1998 & 2006.

Photo:  CP: about 35 mm: Hekili Point, Maui; Nov. 19, 2007.

Observations and comments:

Note 1:  ( )
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