Janolus sp. 4

Order: NUDIBRANCHIA
Suborder: ARMININA
Family: Zephyrinidae

PHOTO

Honiara, Solomon Ids. Photo: Bruce Potter.

Authorship details
Rudman, W.B., 2001 (January 4) Janolus sp. 4 [In] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/janosp4

Related messages


Janolus sp. 4 from Lembeh

November 24, 2009
From: Zeineb Alhaidari

Concerning message #7100:

Dear Bill ,
Is this a Janolus, and if so, could it be Janolus sp. 4 ?

Locality: Dive site : Nudi Falls , Lembeh strait, 10 metres, North Sulawesi , Indonesia, Molucca sea, 05 October 2009, Sandy bottom with scattered reefs. Length: 3 cm. Photographer: Zeineb Alhaidari.

Many thanks for your answer,
kind regards,
Zeineb

z.alhaidari@wanadoo.fr

Alhaidari, Z., 2009 (Nov 24) Janolus sp. 4 from Lembeh. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22769

Dear Zeineb,

Yes this is Janolus sp. 4. Your photo nicely shows the branching bryozoan it lives and feeds on.

Best wishes,
Bill Rudman

Rudman, W.B., 2009 (Nov 24). Comment on Janolus sp. 4 from Lembeh by Zeineb Alhaidari. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22769

Janolus sp. 4? from Singapore.

December 15, 2008
From: Toh Chay Hoon

Concerning message #7100:

Dear Dr Bill,

This nudibranch was sighted on a sandy substrates while diving at Pulau Hantu, one of Singapore's southern islands. It looks similar to Janolus sp. 4.

It was moving pretty fast and I would say it's like how a big fat juicy caterpillar moves.

Locality: Pulau Hantu, 15 m , Singapore, South China Sea, 23 March 2008, Sandy Substrates. Length: 20 mm. Photographer: Toh Chay Hoon.

Toh Chay Hoon

sonnenflower@gmail.com

Toh C.H., 2008 (Dec 15) Janolus sp. 4? from Singapore.. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22081

Dear Chay Hoon,
It is often difficult to determine if these aeolid-looking nudibranchs are aeolids or something else - perhaps even sacoglossans. Fortunately, as we can see in a close-up of one of your photos, this animal has the wrinkled ridge [caruncle] between the rhinophores which shows it is indeed a species of Janolus. Bernard Picton [message #21950] wondered whether there were two species in the group I am calling Janolus sp 4, so there si the possibility that there is more than one species involved.  Your animal certainly falls into the range of colour pattern I am considering to be Janolus sp 4.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Dec 15). Comment on Janolus sp. 4? from Singapore. by Toh Chay Hoon. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/22081

Re: Janolus sp from Lambeh, Indonesia

October 9, 2008
From: Bernard Picton

Concerning message #20873:

Hi Bill,
I just noticed there seem to be two species within your Janolus sp.4 - one with red rhinophores with white tips and rings at the tip of the cerata, the other with white rhinophores with purple tips and purple caps to the rhinophores?

Bernard

Bernard.Picton@nmni.com

Picton, B. E., 2008 (Oct 9) Re: Janolus sp from Lambeh, Indonesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21950

Dear Bernard,
You could be right, but I think they are all part of a continuum. In fact the photo on the Fact Sheet shows an animal with cerata of both colour patterns. The rhinophores do look a bit starkly different but seeing the variability in the ceratal colour pattern makes variability in the rhinophores more reasonable.

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Oct 9). Comment on Re: Janolus sp from Lambeh, Indonesia by Bernard Picton. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/21950

Janolus sp from Lambeh, Indonesia

October 7, 2008
From: François Zylberman


Dear Bill,

Could you help me to identify this nudibranch?

It is interesting to see how it lays its eggs directly on the sand.

Locality: Lambeh strait, 15 m, Indonesia, North Sulawesi, Indopacific, april 2006, muck dive. Length: 70 mm. Photographer: François Zylberman.

Many thanks.

François Zylberman
www.geodia.com

francois@geodia.com

Zylberman, F., 2008 (Oct 7) Janolus sp from Lambeh, Indonesia. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20873

Dear François,

This is an unnamed species of Janolus I am calling Janolus sp. 4 on the Forum.It is certainly strange seeing it laying its eggs like this on a loose

Best wishes,
Bill Rudman

Rudman, W.B., 2008 (Oct 7). Comment on Janolus sp from Lambeh, Indonesia by François Zylberman. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/20873

Janolus sp.4 from the Philippines

September 25, 2003
From: Erwin Köhler


Dear Bill,
Here is Janolus sp.4 from the Philippines, Negros Oriental Island, Lipayo,
divesite, "Dauin".

Length: 44mm
Depth: 18m
Date: 07 May 2003

Cheers,
Erwin

Erwin@Philippine-Sea-Slugs.com

Köhler, E., 2003 (Sep 25) Janolus sp.4 from the Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/10309

Thanks Erwin,
The closeup of the head shows the shape of the rhinophores and the warty caruncle between them, very well
Best wishes
Bill Rudman

Janolus from Red Sea

May 2, 2003
From: Craig Copland

Hi
Please help me identify this nudibranch. We found it on the wreck of the Ulysses at Bluff Point, northwest Red Sea, Egypt on April 16, 2002 at appoximately 20 meters depth.
Thanks!
Craig Copland.
http://www.scubadv.com/gallery.htm

glugslug@scubadv.com

Dear Craig,
This is a species of Janolus which I have on the Forum as Janolus sp. 4. It seems to be widespread in the Indo-West Pacific. Species of Janolus are bryozoan feeders.
Best wishes,
Bill Rudman

Rudman, W.B., 2003 (May 2). Comment on Janolus from Red Sea by Craig Copland. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/9734

Janolus sp. 4 from Philippines

August 11, 2002
From: Jeff Rosenfeld

Bill,
Is this a known species or is it the species you are presently calling Janolus sp. 4? The photo was taken in Anilao, Luzon Island, Philippines in April, 2000.
Thanks.
Jeff

jhrosenfeld@seattleschools.org

Rosenfeld, J., 2002 (Aug 11) Janolus sp. 4 from Philippines. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/7100

Dear Jeff,
Yes this is 'Janolus sp. 4'
Cheers,
Bill Rudman

Janolus from Solomon Ids

January 11, 2001
From: Bruce Potter

Dear Bill,
While doing some filming of some anchor chains and attachments for some ship moorings in Honiara harbour, (Solomon Islands), I came across several of these. It was in a very muddy, silty harbour area, at about 12 meters. I have identified it as a Janolus. Are you able to add to that?
Thanks for your help.
Regards
Bruce Potter.

bruce.potter@adventist.org.sb

Potter, B., 2001 (Jan 11) Janolus from Solomon Ids. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3394

Dear Bruce
This species is found throughout the Indo-West Pacific but does not appear to be particularly common. It is unnamed at present.
Bill Rudman

Rudman, W.B., 2001 (Jan 11). Comment on Janolus from Solomon Ids by Bruce Potter. [Message in] Sea Slug Forum. Australian Museum, Sydney. Available from http://www.seaslugforum.net/find/3394