Elysia sp. #10
|Maximum size: 5 mm.
This is a small, highly variable and cryptic species. The parapodia are
proportionately thick with two broad, low chimneys. The rhinophores are
short and there is no visible pericardium – rather, two prominent veins
emerge from a shallow depression near the anterior origin of the
parapodia. The body is usually mottled in cream and brown with peach
blotches but may be chalky white or cream with a narrow, submarginal
white line. Rarely, there may be black pigment on the parapodia. (see photo) The body surface ranges from nearly smooth to strongly
papillate and strongly papillate animals usually have three pairs of
enlarged tubercles on
the interior of their parapodia.
Elysia sp. #10 is
moderately common. It's been found in
rocky habitats from < 1 to 13 m (< 3 to 43 ft) and
moderately protected to moderately exposed locations. Mature
animals are diurnally active. When resting at night, the parapodia are
held in a widely spread, but elevated, posture giving the animal a
profile reminiscent of an aircraft carrier. The egg mass is a tightly
coiled, pale yellow spiral contained within a flattened mucous sheath.
A longitudinal line of opaque cream pigment may be present on the outer
whorl. Hatching occurs in about four days in the laboratory.
Big Island, Maui and Kauai: widely distributed in the Pacific
It was first recorded in Hawaii from Maluaka,
Maui by CP on Nov. 15, 1995.
light, papillate; 5
mm: found by PF; Whaler's Village, Maui; April 22, 2007.
Observations and comments:
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