Phyllidia varicosa

Lamarck, 1801

Phyllidia varicosa
Photographed by: Erwin Kodiat

Kingdom:Animalia
Phylum:Mollusca
Class:Gastropoda
Subclass:Opisthobranchia
Order:Nudibranchia
Suborder:Doridina
Family:Phyllidiidae
Species:Phyllidia varicosa

Comment from Nathalie Yonow on photo #24362
With 4 black longitudinal lines and short perpendicular ones, I am presuming it has a line on the sole of the foot and is therefore P. varicosa.

Comment from Nathalie Yonow on photo #13539
This looks like a very untidy varicosa...

Comment from Nathalie Yonow on photo #16711
With many more perpendicular black lines around the margin than in elegans.

Comment from Nathalie Yonow on photo #18252
Rueppelii does not occur in Indonesia. the connecting dorsal black lines and perpendicular ones indicate varicosa, but not very clear photograph.

Comment from Nathalie Yonow on photo #20617
The tubercles in the central three rows are tending towards ridges, lots of perpendicular ones around the margin.

Comment from Nathalie Yonow on photo #11968
yes, a neat and tidy one! Three longitudinal rows of tubercles and perpendicular ones around the margin.

Comment from Nathalie Yonow on photo #1492
Yes, with 4 parallel longitudinal lines and perpendicular ones around the border. It has a broken black line along the sole of the foot if you turn it over.

Comment from Nathalie Yonow on photo #14308
Yes, looks very big!

Comment from Nathalie Yonow on photo #15526
yes; looks like a small specimen, the tubercles are not very developed.

Comment from Nathalie Yonow on photo #14606
I think its bum end is at the top of the photo.

Comment from Nathalie Yonow on photo #14669
You can see the anus at the bottom right.

Comment from Nathalie Yonow on photo #14767
You can see the anal opening at the bottom left of the photo, in the midline between orange tubercles 2 and 3.

Comment from Richard Willan on photo #10203
A juvenile individual.

Comment from Richard Willan on photo #9423
A very small juvenile individual

Comment from Richard Willan on photo #8661
This individual is typical of the Indian Ocean form

Comment from Richard Willan on photo #8345
This individual has its rhinophores withdrawn and just their tips are visible. They are located about one-sixth of the way back from the anterior end of the body (left hand side of this photo) on either side immediately in front of a tubercle (called the rhinotubercle).

Comment from Richard Willan on photo #7162
Phyllidia varicosa (2 animals at rear) plus Phyllidia coelestis (1 animal in foreground)

Comment from Richard Willan on photo #6230
Probably a very small juvenile individual.

Comment from Richard Willan on photo #6134
Comment from Nathalie Yonow: This appears to be a juvenile Phyllidia varicosa, very similar to one I have from the Red Sea. It doesn't have the bar between the rhinophores of Phyllidia alyta, with which it might be confused. Unless there is a photo of the ventral side, we can never be certain!

Comment from Nathalie Yonow on photo #5569
With lines of orange-tipped tubercles and black lines in-between. This is one of the interesting variations where there is a transverse black line behind the rhinophores.

Comment from Richard Willan on photo #5009
This identification would need to be checked by turning the specimen over to check it has a black stripe on the foot sole. Phyllidia varicosa is certainly known to be common in Hawaii.

Comment from Nathalie Yonow on photo #3348
I have seen a few specimens with that transverse black line anteriorly, like Phyllidia elegans. Very odd. But usually with four smooth black longitudinal lines lining three rows of orange tipped tubercles.

Comment from Richard Willan on photo #1876
This individual is characteristic of Indian Ocean populations of this species which have 3 parallel longitudinal rows of pustules on the centre of the mantle. In contrast, Pacific Ocean populations of this species have only 1 definite row mid-centrally.

Comment from Richard Willan on photo #2664
This image shows the dorsal location of the anal pore nicely as a black dot in the midline towards the rear.

Comment from Richard Willan on photo #1616
This individual has sustained serious damage on the centre of its notum, this disrupting the normally straight rows of pustules.

Comment from Richard Willan on photo #2581
A typical individual.

Comment from Richard Willan on photo #1821
The dorsal tubercles are arranged in definite longitudinal ridges, which is typical of Phyllidia varicosa. They would not be arranged so regularly like this in Phyllidia coelestis and also there are not enough small pustules close to the edge of the mantle to be Phyllidia coelestis.

Comment from Richard Willan on photo #2039
An unusual individual in which the pustules on the mantle are not clearly grouped into three longitudinal rows. But this could be an artefact of its posture. There is a single large pustule immediately behind each rhinophore (called a rhinotubercle). There is a series of prominent black longitudinal dashes forming a stripe on the foot sole.

Locality:

 

Pictures of Phyllidia varicosa

Phyllidia varicosa from Raja Ampat, IndonesiaIdentification reviewed by Richard Willan
Posted 9 years ago
Viewed 6384 times
Phyllidia varicosa from Raja Ampat, IndonesiaIdentification reviewed by Richard Willan
Posted 9 years ago
Viewed 5767 times
Phyllidia varicosa from Derawan, Indonesia
Posted 9 years ago
Viewed 5458 times
Phyllidia varicosa from Mabul, Malaysia
Location: Mabul, Malaysia
Posted 9 years ago
Viewed 5264 times
Phyllidia varicosa from Mabul, Malaysia
Location: Mabul, Malaysia
Posted 9 years ago
Viewed 5384 times
Phyllidia varicosa from Tenggol, Malaysia
Posted 9 years ago
Viewed 5110 times
Phyllidia varicosa from Lembeh, Indonesia
Posted 9 years ago
Viewed 5211 times
Phyllidia varicosa from Lankayan, MalaysiaIdentification reviewed by Richard Willan
Posted 9 years ago
Viewed 5278 times
Phyllidia varicosa from Manado, Indonesia
Posted 9 years ago
Viewed 5177 times
Phyllidia varicosa from Tioman, MalaysiaIdentification reviewed by Richard Willan
Posted 9 years ago
Viewed 5747 times
Phyllidia varicosa from Bali, IndonesiaIdentification reviewed by Richard Willan
Location: Bali, Indonesia
Posted 8 years ago
Viewed 5483 times
Phyllidia varicosa from Ambon, IndonesiaIdentification reviewed by Richard Willan
Posted 8 years ago
Viewed 5290 times
 
 

Similar Species

Author: Nila Murti

To untrained eye, Phyllidia coelestis can easily be mistaken for Phyllidia varicosa and vice versa. Understandable, as these two posses very similar basic form, coloration and pattern. Both have tubercles with blue bases and yellow caps.

To differentiate the two look at the dorsal pattern. If the nudibranch has a median ridge it's a Phyllidia varicosa. If it doesn't have a median ridge and the ridge forms a Y shape arrangement instead, it's a Phyllidia coelestis.

Phyllidia coelestis also shows a broader mantle margin with smaller tubercles that has no yellow caps.

And also juvenile form of sea cucumber, Pearsonothuria graffei, mimic Phyllidia varicosa

Phyllidia coelestis from Halmahera, IndonesiaIdentification reviewed by Richard Willan
(195 photos)
 
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