Okenia brunneomaculataGosliner, 2004
One of the other six new species described in Gosliner’s 2004 monograph on Indo-Pacific Okenia, Sakishimaia, Hopkinsiella and Hopkinsia, is Okenia brunneomaculata.
One of the more cryptic species of Okenia, O. brunneomaculata is small, 4-6 mm in length, translucent white with a lateral band of irregular chocolate brown spots and similar spots scattered over the notum. These brown spots are why Terry named the species, brunneomaculata. This species has 5-6 pairs of marginal papillae, the two anterior most which are in front of the rhinophores and pointed forward. There are also 4-7 medial dorsal papillae in front of the gill.
The species is known only from Luzon, Philippines and Bali, Indonesia. I am unaware of its photo being published anywhere in the literature. It bears some external similarity to Okenia mija from southern Australia, but is distinct from that temperate species.
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Gosliner, Terrance M. 2004. Phylogenetic systematics of Okenia, Sakishimaia, Hopkinsiella and Hopkinsia (Nudibranchia: Goniodorididae) with descriptions of new species from the tropical Indo-pacific. Proc. California Academy of Sciences 55(5): 125-161.
David W. Behrens
Pacific Coast Nudibranchs
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