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Thordisa cf. oliva  Chan & Gosliner, 2007

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cf. is an abbreviation from a Latin word (confer) and means 'refer to' or 'compare with', here it means it could possibly be Thordisa oliva or perhaps something closely related, or at least similar in appearance. Let me quote the description of Thordisa oliva (Chan & Gosliner, (2007)):"The notum of the living specimens is a dark green mantle color with tan colored papillae and tubercles. The rhinophores and gill are opaque white."
The specimen #5 was misidentified by David W. Behrens as Thordisa oliva  Chan & Gosliner, 2007.
That is the reason why this species which was posted on 17 September 2010 at these websites a Discodorididae sp. A Family: Bergh, 1891 had been changed on 8 September 2011 into Thordisa oliva  Chan & Gosliner, 2007.
Thordisa cf. oliva differs in several points from Thordisa oliva: all tubercles are of the same colour as the mantle, not tan, the papillae are clear/ translucent, not tan. In most specimens are the rhinophores and gills tan, not opaque white, only specimen #5 has opaque white rhinophores and gills.
IPN writes on Thordisa oliva at page 171: "Known from tropical South Africa and the Kerama Islands of southern Japan."
The type locality of Thordisa oliva  Chan & Gosliner, 2007 is Sodwana Bay, South Africa, I doubt the records from Japan.
I changed it on 15 November 2019 into Thordisa cf. oliva  Chan & Gosliner, 2007.
References:
Gosliner, Terrence M., David W. Behrens & Ángel Valdés. 2008. Indo-Pacific Nudibranchs and Sea Slugs.
Sea Challengers Natural History Books. Gig Harbor, Washington. 426pp.
Chan, J. M.; Gosliner, T. M. (2007). Preliminary phylogeny of Thordisa (Nudibranchia: Discodorididae) with descriptions of five new species.
The Veliger. 48(4): 284 - 308. available online at http://biodiversitylibrary.org/page/50502455
How to cite:
Köhler, E. (2019), published 15 November 2019, Thordisa cf. oliva  Chan & Gosliner, 2007
available from https://www.Philippine-Sea-Slugs.com/Nudibranchia/Doridina/Thordisa_oliva.htm

 
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