Acanthodoris hudsoni
MacFarland, 1905

Order: NUDIBRANCHIA
Suborder: DORIDINA
Superfamily: ANADORIDOIDEA
Family: Onchidorididae

PHOTO

Upper: Northern end of Vancouver Island the first week of October diving around Port Hardy and Browning Pass, British Columbia, Canada. October 2003. Photo: Bruce Wight.
Lower: Vancouver, Canada. divesite "Flemming Bay", August 12, 1997. Size about 3 cm, Depth 12 m. Photo: Frank Gloystein. Apparently this is a photo of a pale colour form in which yellow markings are a pale cream.

The body and mantle are translucent white. The mantle is covered with long pointed papillae. The rhinophores have a relatively short stalk and a long recurved lamellate club. Both the gills and rhinophores are translucent clear but the tips of the gills and rhinophore club are suffused with a yellow tinge. There is an opaque border to the mantle which is usually a milky yellow. The tips of the papillae are usually of the same colour. In some specimens the mantle border and tips of the papillae are cream white rather than yellow.

Reference:
• MacFarland, F.M. (1905). A preliminary account of the Dorididae of the Monterey Bay, California. Proceedings of the Biological Society of Washington, 18: 35-54

Authorship details
Rudman, W.B., 2000 (October 29) Acanthodoris hudsoni MacFarland, 1905. [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/factsheet/acanhuds

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