Phyllidia carlsonhoffi

Brunckhorst, 1993

Phyllidia carlsonhoffi
Photographed by: Doug Beitz

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

Comment from Scott Johnson on photo #17066
Either Phyllidia carlsonhoffi or Phyllidia madangensis. It seems all the ones like this I have been seeing in the Marshalls lately are Phyllidia madangensis, since they have lacked the dark line running up the center of the foot bottom.

Comment from Scott Johnson on photo #16716
Probably Phyllidia carlsonhoffi, but it could be Phyllidia madangensis. You'd need to check the bottom of the foot for a black line (present in Phyllidia carlsonhoffi) to be sure.

Comment from Scott Johnson on photo #16721
Probably Phyllidia carlsonhoffi, but you would need to see the bottom of the foot to be sure. Its slightly compounded larger tubercles are I think more characteristic of Phyllidia madangensis, but the small tubercles interspersed between the larger ones more match the original description of Phyllidia carlsonhoffi.

Comment from Scott Johnson on photo #16727
I recently wrote up some of my frustrations identifying this group on my own web site at http://www.underwaterkwaj.com/nudi/nudi.htm. Yes, I think I would call this Phyllidia carlsonhoffi, although I have seen specimens of Phyllidia madangensis that look virtually identical dorsally. The only way to tell them apart sometimes is to look for a dark line running along the center of the bottom of the foot, present in Phyllidia carlsonhoffi and absent in Phyllidia madangensis.

Comment from Scott Johnson on photo #16402
Yes, I think these are Phyllidia carlsonhoffi. This is a difficult group. These "Phyllidia varicosa look-alikes" are often variable and there is frequently no good line of demarcation between what we currently consider different species. I'm sure there are identification errors on some of these species on all the web sites, including mine. Dorsally, these look like what I call Phyllidia carlsonhoffi here in the Marshalls.
However, I have seen Phyllidia madangensis that could not be distinguised dorsally from Phyllidia carlsonhoffi. You'd have to look at the bottom of the foot to be sure -- Phyllidia carlsonhoffi has a dark line running down the center of the foot bottom, while Phyllidia madangensis has no such line.

Comment from Nathalie Yonow on photo #14180
I think this may be carlsonhoffi and not tula, with the large and small tubercles.

Comment from Richard Willan on photo #9735
A juvenile individual.

Comment from Richard Willan on photo #4892
A nice photo of a typical individual. Note the alternating large conical orange-capped tubercles and small rounded white tubercles on the mantle.

Comment from Richard Willan on photo #4893
A juvenile individual.

Comment from Richard Willan on photo #1409
In having white patches connecting the pustules on the centre of the mantle, this individual is like the one from Saipan taken by Harry Blalock in the previous batch of images.

Comment from Richard Willan on photo #1376
This is a typical individual in that the white patches at the base of the tubercles on the central section of the mantle do not coalesce, in comparison with some of the other animals of this species on Nudi Pixel where the patches show considerable coalescing.

Comment from Richard Willan on photo #1356
An atypical individual in that the dorsal tubercles along the midline are united by white patches. Normally the white pigment is only present as a ring around the base of the tubercles.

Comment from Richard Willan on photo #1035
This individual has more white pigment on the mantle than I have seen before. To be absolutely sure this individual is indeed Phyllidia carlsonhoffi and not the similar looking Phyllidia madangensis, a detailed image would need to be taken of the head (Phyllidia madangensis has a small tubercle immediately in front of each rhinophoral pocket, whereas Phyllidia carlsonhoffi has none) and also of the under surface (Phyllidia madangensis has a median longitudinal black line, whereas Phyllidia carlsonhoffi has none).

Locality:

 

Pictures of Phyllidia carlsonhoffi

Phyllidia carlsonhoffi from Raja Ampat, Indonesia
Posted 8 years ago
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