Dendronotus sp. 1

Order: NUDIBRANCHIA
Suborder: DENDRONOTINA
Family: Dendronotidae

PHOTO

Karang Kaledupa, Tukang Besi Archipelago, SE Sulawesi, Indonesia, 52 ft. Size: 6 mm. August 1999. PHOTO: Lindsay Warren.

See messages below.

Authorship details
Rudman, W.B., 2000 (March 22) Dendronotus sp. 1 [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/dendron

Related messages


Dendronotus sp. 1 from Malaysia

March 30, 2010
From: Marcel Tanke


Concerning message #18621:

Dear Bill,

Could you please help to ID this nudibranch?
A Bornella?

Locality: Mabul Island, about 15 meters, Malaysia, 26 December 2009, Wall, sandy areas. Length: 1 cm. Photographer: Marcel Tanke.

Thanks,
Marcel

Marceltanke@cs.com

Tanke, M.A., 2010 (Mar 30) Dendronotus sp. 1 from Malaysia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23059

Dear Marcel,

It is quite close to Bornella. I am pretty sutre this is an unnamed species of Dendronotus which I have included in the Forum as Dendronotus sp. 1. It appears to have a white and a yellowish colour form.

Best wishes,
Bill Rudman

Rudman, W.B., 2010 (Mar 30). Comment on Dendronotus sp. 1 from Malaysia by Marcel Tanke. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/23059

Dendronotus sp. from Indonesia

October 6, 2008
From: Wolfgang Kraemer

Dear Bill,

Here is a photo of what I assume a Dendronotus. Can you please help in the identification?

Locality: South end of Siladen Island, Manado, 15 m, Indonesia, Celebes Sea, 6. September 2007, Wall. Length: approx. 25 mm. Photographer: Wolfgang Kraemer.

Thanks and regards,
Wolfgang

wolfgangkr@gmx.net

Kraemer, W., 2008 (Oct 6) Dendronotus sp. from Indonesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21382

Dear Wolfgang,

I agree that this is the 'tropical' Dendronotus I am calling Dendronotus sp. 1. Most animals we have photos of don't have the strong orange coloration seen in your animal, but in external anatomy I can't see any real differences, and even the 'whitest' example we have still has orange rhinophores.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Oct 6). Comment on Dendronotus sp. from Indonesia by Wolfgang Kraemer. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21382

Dendronotus from Sabah, Malaysia

October 2, 2008
From: Sylvie Grall

Dear Bill,
Is this seaslug a variant of Bornella stellifer? It doesn't look like it.
I've been through all the sources I know of but couldn't find this particular design.

Locality: Mabul reef, 12 m, Sabah, Malaysia, China Sea, August 2008, muddy. Length: 3 cm. Photographer: Sylvie Grall.

Thank you very much for your help.
Sylvie

sylvgrall@orange.fr

Sylvie Grall, 2008 (Oct 2) Dendronotus from Sabah, Malaysia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21909

Dear Sylvie,
This is a relative of Bornella which I have been calling Dendronotus? on the Forum because it looks like a species of Dendronotus but all the species I am familiar with are from cold northern waters. Now that I have two other unnamed species on the Forum I think I should br brave and start calling this tropical animal Dendronotus sp. 1. The brown spots on the body and orange rhinophores seem to be characteristic. Hopefully someone will look at its anatomy soon and sort out just what it is.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Oct 2). Comment on Dendronotus from Sabah, Malaysia by Sylvie Grall. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21909

Dendronotus from Bali

June 29, 2007
From: Eric Huang


Dear Bill,

Was diving in Bali and came across this individual. Looked in several books but could not seem to pin the name down.

Locality: Seraya Beach, Bali, 10 metres, Indonesia, Java Sea/Sulu Sea, 11 February 2007, Volcanic Sand and Rubble. Length: 20mm. Photographer: Eric Huang.

Thanks
Eric Huang

eric@adventure-x-change.com

Huang, F.W., 2007 (Jun 29) Dendronotus from Bali. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19490

Dear Eric,

Thanks for this excellent photo of this puzzling species which I have tentatively identified as a species of Dendronotus. If it does belong to that genus it is very strange because all the other species are from temperate or cold water.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jun 29). Comment on Dendronotus from Bali by Eric Huang. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/19490

Dendronotus? from Philippines

June 29, 2007
From: Ray Izumi

Concerning message #15362:

Here are some pictures of this interesting species from Kirby's Rock, Anilao, Philippines, taken at 27 meters in coral rubble in April, 2005. Water temp was 28 C, specimen was about one inch long.

Locality: Kirby's Rock, Anilao, 27 meters, Philippines, Pacific, April 2005, Coral rubble. Length: 1 inch. Photographer: Ray Izumi.

Ray Izumi

skeptic@centurytel.net

Izumi, R., 2007 (Jun 29) Dendronotus? from Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18994

Thanks Ray,

I must say, all the photos I have seen so far seem to confirm this is a Dendronotus. I guess we will need to know what it looks like inside before we can be sure.

Best wishes,
Bill Rudman

Rudman, W.B., 2007 (Jun 29). Comment on Dendronotus? from Philippines by Ray Izumi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18994

Re: Dendronotus? from Java Sea

December 11, 2006
From: Hengky Dotulong

Re: message #12692

I also found this Dendronotus sp. in Bali, similiar in different colour.

Locality: Drop Off, Tulamben, Depth: 20 meters. Bali, Indonesia, Lombok Strait. Length: 8 cm. 28 April 2004, Black Sand. Photographer: Hengky Dotulong

Hengky Dotulong

hengky@dotulong.net

Dotulong, H., 2006 (Dec 11) Re: Dendronotus? from Java Sea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15362

Thanks Hengky,
This is a useful addition to our knowledge of this species.

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Dec 11). Comment on Re: Dendronotus? from Java Sea by Hengky Dotulong. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/15362

Dendronotus sp. from Bali

December 11, 2006
From: Vincent Tomeno

Hi Bill.

I couldn't manage to identify this nudibranch in the attached picture. I guess it is a Bornella, but I couldn't find the exact species. The picture was taken in Bali, Indonesia, in September this year.

Vincent

vtom2@free.fr

Vincent Tomeno, 2006 (Dec 11) Dendronotus sp. from Bali. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18943

Dear Vincent,
The stalked rhinophores do give this the look of a Bornella, but it is another example of what I guess is a tropical species of the temperate water genus Dendronotus. Of course that identification  is based totally on photos and needs confirmation when someone has a chance to look at its anatomy.

Best wishes,
Bill Rudman

Rudman, W.B., 2006 (Dec 11). Comment on Dendronotus sp. from Bali by Vincent Tomeno. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/18943

Dendronotus? from Java Sea

February 9, 2005
From: Erwin Kodiat

A friend of mine, Budi Ramadi Jerry, took this picture in his dive at Sangiang Island, West Java, Indonesia. Do you think it is Dendronotus? He suspected it is a nudibranch, but I suspected it is a sea cucumber.
Erwin Kodiat

ungu@terong.com

Kodiat, E., 2005 (Feb 9) Dendronotus? from Java Sea. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/12692

Dear Erwin,
Although it looks quite like a sea cucumber, the black knob at the left end of the animal is its rhinophore, the chemosensory head tentacle found in sea slugs. It's almost certainly the same as the animal we already have a photo of on the Forum, which looks very like a Dendronotus, a genus usually found in temperate waters. As you suspect, it is the animal on the Forum labelled as Dendronotus ?
Best wishes
Bill Rudman

 

Rudman, W.B., 2005 (Feb 9). Comment on Dendronotus? from Java Sea by Erwin Kodiat. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/12692

Dendronotus? from Sulawesi

March 22, 2000
From: Lindsay Warren

Dear Bill
In 1998 I emailed you a photo of a similar specimen found in 1997.  In 1999 we found a further three and pictured here is the one found by Bryan Lee at 4 pm on 10 August 1999 at a depth of 52 ft on coraline algae off Karang Kaledupa  [Tukang Besi Archipelago, SE Sulawesi, Indonesia - Operation
Wallacea].  Size: 6 mm.

The body is creamy white with a pale orange on the notum and irregular dark brown patches down its length.  On either side are four cerata with branched tips.  The rhinophores are vivid orange, lamellate and can be
retracted into long sheaths.  There are two pairs or feathered processes at the anterior end, the lower pair being smaller than the upper pair.  Dark areas in the body going into the cerata look as if they might be digestive glands.   When in mid water it wriggles from side to side like a Bornella.

They tend to be quite sensitive to handling so one has to be quick to photograph and illustrate them.  Photo: Lindsay Warren.

I thought you might like to see this shot as it is conserably sharper than the first one and might help in its identification.

All the best
Lindsay Warren

100014.2112@compuserve.com

Warren, L., 2000 (Mar 22) Dendronotus? from Sulawesi. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2136

Dear Lindsay,
Thanks for the excellent description and the photo. All the evidence suggests a species of Dendronotus, which as I said before, is an unusual genus to find in tropical waters. I think all other species are from cooler temperate waters.

I feel I should recognise such a distinctive beast. Has anyone seen this animal before?

Best wishes,
Bill Rudman.

Rudman, W.B., 2000 (Mar 22). Comment on Dendronotus? from Sulawesi by Lindsay Warren. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/2136

Possible Dendronotus?

April 9, 1998
From: Lindsay Warren

Dear Bill
As with the others this possible Dendronotus was found around Pulau Hoga in the Tukang Besi islands of SE Sulawesi, Indonesia last September when Bernard Picton was also there. Most of the diving was on walls as previously described heavily covered in hard and soft corals, ascidians, coralline algae and small areas of green / brown algae with depths between 3-20m. Unfortunately I do not have the notes of exactly what surface it was each found on.
Many thanks for your help
All the best
Lindsay Warren

100014.2112@compuserve.com

Warren, L., 1998 (Apr 9) Possible Dendronotus?. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/162

I am not familiar with this animal. It certainly looks like a species of Dendronotus. which is puzzling because until now that genus seemed to be restricted to the temperate North Atlantic and North Pacific. A good picture of the European species Dendronotus frondosus (Ascanius, 1774) is on Bernard Picton's site and three species from the West Coast of North America are on Michael Miller's Pacific Coast Nudibranchs site...Bill Rudman

Rudman, W.B., 1998 (Apr 9). Comment on Possible Dendronotus? by Lindsay Warren. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/162