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Halgerda wasinensis
Eliot, 1904
Order: NUDIBRANCHIA
Suborder: DORIDINA
Superfamily: EUDORIDOIDEA
Family: Dorididae
DISTRIBUTION
East Africa (Kenya, Tanzania, South Africa)
PHOTO
UPPER RIGHT: Bahari Beach, Dar es Salaam, Tanzania, 22mm long alive, February 1974. LOWER LEFT, RIGHT: Pangavini, Dar es Salaam, Tanzania, 25mm long alive, November 1976. PHOTOS: Bill Rudman.
Grows to at least 50mm long. The mantle is dark brown or black with a band of white around the margin. The mantle is covered with a pattern of ridges except around the edge. These ridges are edged in bright yellow. There are blackish brown spots in the white band round the mantle edge. The underside of the mantle and the foot are white with large rounded dark purplish brown or black spots. The upper twothirds of the rhinophore clubs are black and the lower third is yellowish, especially on the anterior side. The white rhinophore stalk has a black band down the posterior side. The gills are more pinnate and compact than in other species of Halgerda. They are translucent white with black patching.
Specimens I have examined from Kenya and Tanzania have relatively sharply angled mantle ridges and narrow yellow lines. However a photo of a South African animal in Gosliner's South African nudibranch book suggests that specimens from there have more rounded ridges and subsequently wider yellow lines.
Reference:
• Rudman, W.B. (1978) The dorid opisthobranch genera Halgerda and Sclerodoris from the Indo-West Pacific. Zoological Journal of the Linnean Society, 62: 59-88.
Rudman, W.B., 2000 (May 18) Halgerda wasinensis Eliot, 1904. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/halgwasi
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