Marsenina(?) sp. #1
|Maximum size: 18 mm.
with a finely papillate dorsal
surface. The dorsum is decorated with variably developed radiating bands
opaque-white and variably developed blood-red patches. The edges of
the patches often have a few contrasting white flecks and the papillae
in violet-brown. In some animals dendritic brown lines are present in
the lateral red spots. There are a few variably developed, translucent
tubercles in the center of the dorsum.
The only Marsenina(?)
sp. #1 we've found on Maui was on a
waxy, white tunicate on which it was well camouflaged (and, possibly
feeds?). It was under a rock in
a highly protected rocky habitat at 3-5 m (10-16 ft). In contrast, it
appears to be fairly common in protected, rocky habitats on Oahu. Unlike
Hawaiian velutinids, it temporarily roles it's mantle into a tube when
Maui and Oahu.
It was first
recorded in Hawaii from Kahului Harbor, Maui by CP on April 8, 2010. We've tentatively assigned it to Marsenina because of its morphological similarity to some photos of the west coast species, Marsenina stearnsii.
Photo: CP: 15
mm: Kahului Harbor, Maui; April 8, 2010.
Observations and comments: