Hypselodoris nigrostriata

(Eliot, 1904)

Hypselodoris nigrostriata
Photographed by: Erwin Kodiat

Kingdom:Animalia
Phylum:Mollusca
Class:Gastropoda
Subclass:Opisthobranchia
Order:Nudibranchia
Suborder:Doridina
Family:Chromodorididae
Species:Hypselodoris nigrostriata

Comment from Richard Willan on photo #18080
A typical individual.

Comment from Richard Willan on photo #8865
A very small juvenile individual

Comment from Richard Willan on photo #8676
A very small juvenile individual.

Comment from Richard Willan on photo #5206
A juvenile individual. Juvenile individuals do not have a yellow marginal band; this band develops and becomes continuous as the individual matures.

Comment from Richard Willan on photo #3878
This Hypselodoris individual is juvenile so I cannot decide whether it is Hypselodoris nigrostriata (because of the diagonal lines across the mantle) or Hypselodoris zephyra (because of the lack of a distinct yellow margin). That is assuming they are different species – as I have said several times before I think they are just colour forms of the same species.

Comment from Richard Willan on photo #2075
The striped Hypselodoris in your photo is Hypselodoris nigrostriata because the lines are more or less oblique. In the very similar species, Hypselodoris zephyra the lines are parallel. I thought they were the same species, but then Rudie Kuiter showed me a lot of his pictures from Bali where both species seem to occur together and he has made a strong argument that they are separate in the new book Nudibranchs of the World. So I haven’t made up my mind yet. One other character supposedly only possessed by Hypselodoris nigrostriata is a yellow border to the mantle. I really cannot see this yellow band in the animal in your picture, so maybe that character is no good?

Comment from Richard Willan on photo #1152
It is interesting to see an individual without any yellow spots between the obliquely-directed black lines. It rekindles the debate over whether Hypselodoris nigrostriata (with oblique lines) and Hypselodoris zephyra (with horizontal lines) are really different species.

Locality:

 

Pictures of Hypselodoris nigrostriata

Hypselodoris nigrostriata from Lembeh, IndonesiaIdentification reviewed by Richard Willan
Posted 10 years ago
Viewed 3590 times
Hypselodoris nigrostriata from Bali, Indonesia
Location: Bali, Indonesia
Posted 10 years ago
Viewed 3213 times
Hypselodoris nigrostriata from Lembeh, Indonesia
Posted 10 years ago
Viewed 3679 times
Hypselodoris nigrostriata from Bali, Indonesia
Location: Bali, Indonesia
Posted 10 years ago
Viewed 2896 times
Hypselodoris nigrostriata from Bali, IndonesiaIdentification reviewed by Richard Willan
Location: Bali, Indonesia
Posted 10 years ago
Viewed 3335 times
Hypselodoris nigrostriata from Bali, Indonesia
Location: Bali, Indonesia
Posted 10 years ago
Viewed 3139 times
Hypselodoris nigrostriata from Bali, Indonesia
Location: Bali, Indonesia
Posted 9 years ago
Viewed 3072 times
Hypselodoris nigrostriata from Bali, Indonesia
Location: Bali, Indonesia
Posted 9 years ago
Viewed 3431 times
Hypselodoris nigrostriata from Lembeh, Indonesia
Posted 9 years ago
Viewed 2915 times
Hypselodoris nigrostriata from Lembeh, Indonesia
Posted 9 years ago
Viewed 3028 times
Hypselodoris cf. nigrostriata from Lembeh, IndonesiaIdentification reviewed by Richard Willan
Posted 9 years ago
Viewed 3516 times
Hypselodoris nigrostriata from Bali, Indonesia
Location: Bali, Indonesia
Posted 9 years ago
Viewed 2870 times
 
 

Similar Species

Hypselodoris emmae: The body is a pale cream or yellow with a purple or bluish border to both the foot and the mantle. there are three purple longitudinal lines on the mantle and four brownish lines which vary in intensity in different individuals. The gills and rhinophores are a brilliant reddish orange and in Pacific specimens there is a white tip to the rhinophores.

Hypselodoris whitei has a whitish background color with a reddish purple submarginal line around the mantle edge and a series of five longitudinal lines covering the rest of the mantle. These lines are usually very crooked and joined by a series of lateral connections, breaking the mantle into rows of slightly raised whitish regions. The rhinophores are orange to orange-red with a distinctive white tip and the gills are similarly coloured with white on the inside and usually at the tip of each gill.

Hypselodoris maridadilus is yellow, with a purple border to the foot and the mantle, and a series of five longitudinal purple lines. the gills and rhinophores are bright orange-red.

The lines in Hypselodoris nigrostriata are more or less oblique. In the very similar species, Hypselodoris zephyra the lines are parallel.

Hypselodoris emma from Ambon, IndonesiaIdentification reviewed by Richard Willan
(111 photos)
Hypselodoris whitei from Lembeh, IndonesiaIdentification reviewed by Richard Willan
(189 photos)
 
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