Janolus savinkini

Image courtesy of Jim Black
Raja Ampat, Indonesia

Image also courtesy of Jim Black
Anilao, Philippines

Janolus savinkini Martynov & Korshunova 2012

Terry Gosliner and I had always hoped to name this species. But sometimes when your collection contains nearly 1000 undescribed species, one or two tend to fall through the cracks.

Until now, about 15 species of the genus Janolus have been described. Indo-Pacific Nudibranchs and Sea Slugs contained eight undescribed species which includes Janolus. savinkini, as Janolus sp. 7.

The ground color of J. savinkini is creamy, yellow with a light orange hue. The cerata have the same color throughout most of their length, but apically they are covered with a broad variably colored, purplish ring and bright, opaque blue to brown apical spot. The rhinophores have similar color pattern to the papillae. In addition to showing the wide color range of this species (page 319) we included two closely related undescribed species (which we referred to as Janolus sp. 1 and Janolus sp. 2) which Martynov & Korshunova feel may also belong to Janolus savinkini. Maybe so, but internal anatomy and genetic workup will be necessary to determine this for sure.

Image also courtesy of Jim Black
Lembeh Straits, Indonesia

The image at left illustrates just how color variable this species really is.

Like other Janolids it can be found on arborescent bryozoans throughout the tropical Indo-West Pacific.

We are indebted to renown underwater photographer Jim Black for sharing his images.

Dave Behrens
Sammamish, WA 98074
June, 2014
Send Dave email at davidwbehrens@gmail.com

Jim on location at Anilao, Philippines, May 2013

Jim Black is retired from US Airways after 27 years as a pilot..., flying Captain on an Airbus 330 Internationally.

Diving since 1970...with over 7000 dives logged. Shoots Nikon D-300 in Subal Housing with Ikelite strobes. Macro Mate on 105mm for supermacro.

Jim's photography has been featured in a number of books and publications including Helmut Debelius' Nudibranchs and Sea Snails of Gosliner, Behrens and Williams Coral Reef Animals of the Indo-Pacific. A photo of Jim petting a shark in "Sleeping Shark Caves" off Isla Mujeres Island, Mexico, taken by Amy Foster his significant other, recently appeared in Dave Behrens' Diving Guide to Cozumel, Cancun & The Riviera Maja.

Jim has been a solid supporter of the Slug Site since day one. His countless contributions put him near the top of the list of photographers who have greatly expanded our knowledge of sea slugs. There are a lot of kids in the formative stage of their education who are getting their first introduction to our sea slug friends via the great photographs Jim and other contributors have made to the site. My hat is off to Jim for making this presentation possible!

Send Jim email at jim.black14@verizon.net

From left to right, Terry Gosliner, Angel Valdes, Dave Behrens La Jolla, Calif.

Send Dave email at davidwbehrens@gmail.com

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