Ceratosoma trilobatum

(J. E. Gray, 1827)

Ceratosoma trilobatum
Photographed by: Erwin Kodiat

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

Comment from Terry Gosliner on photo #12313
Juvenile

Comment from Terry Gosliner on photo #12386
A juvenile. Great shot of mantle defensive glands.

Comment from Terry Gosliner on photo #12990
Juvenile

Comment from Richard Willan on photo #10751
A juvenile individual

Comment from Richard Willan on photo #10752
The mantle lobe in front of the gills on the right side is damaged in this individual

Comment from Richard Willan on photo #10927
This individual had a deformed (or damaged) lobe in front of the gills on the right side.

Comment from Richard Willan on photo #10845
A juvenile individual.

Comment from Richard Willan on photo #9335
A juvenile individual

Comment from Richard Willan on photo #5001
The angle from which this photo has been taken makes it a bit difficult to see if there is a sharp ridge in the neck region (which would make it Ceratosoma trilobatum) or no ridge (which would make it Ceratosoma gracillimum). However there is at least some indication of a ridge, so I am more inclined to call it Ceratosoma trilobatum.

Comment from Richard Willan on photo #5420
A juvenile individual.

Comment from Richard Willan on photo #4564
The most common colour form of this species in Queensland has a broad purple band at the mantle margin as in this photograph.

Comment from Richard Willan on photo #4393
Note the continuous mantle brim (outlined in purple) from the head to the lateral processes in front of the gills.

Comment from Richard Willan on photo #4228
Note the sharp ridge between the rhinophores and lateral lobes.

Comment from Richard Willan on photo #3569
It is just possible to make out a continuous marginal brim from the rhinophores to the lateral processes from this photo, so I am more inclined to call it Ceratosoma trilobatum than Ceratosoma gracillimum.

Comment from Richard Willan on photo #7
This species is so variable in colour that it is impossible to pick out a ‘typical’ individual

Locality:

 

Pictures of Ceratosoma trilobatum

Ceratosoma trilobatum from Lembeh, IndonesiaIdentification reviewed by Richard Willan
Posted 8 years ago
Viewed 1249 times
Ceratosoma trilobatum from Lembeh, Indonesia
Posted 8 years ago
Viewed 1091 times
Ceratosoma trilobatum from Perhentian, Malaysia
Posted 8 years ago
Viewed 1091 times
Ceratosoma trilobatum from Perhentian, Malaysia
Posted 8 years ago
Viewed 2454 times
Ceratosoma trilobatum from Bali, Indonesia
Location: Bali, Indonesia
Posted 8 years ago
Viewed 1065 times
Ceratosoma trilobatum from Lembeh, Indonesia
Posted 10 years ago
Viewed 2224 times
Ceratosoma trilobatum from Ambon, Indonesia
Posted 10 years ago
Viewed 2520 times
Ceratosoma trilobatum from Bali, Indonesia
Location: Bali, Indonesia
Posted 9 years ago
Viewed 2292 times
Ceratosoma trilobatum from Lembeh, IndonesiaIdentification reviewed by Richard Willan
Posted 9 years ago
Viewed 3576 times
Ceratosoma trilobatum from Davao, PhilippinesIdentification reviewed by Richard Willan
Posted 8 years ago
Viewed 2796 times
Ceratosoma trilobatum from Manado, Indonesia
Posted 10 years ago
Viewed 2571 times
Ceratosoma trilobatum from Manado, Indonesia
Posted 10 years ago
Viewed 2601 times
 
 

Similar Species

Ceratosoma gracillimum can be distinguished externally by the complete absence of the mantle edge between the head and the well-developed lateral lobes on each side.

Ceratosoma trilobatum has the mantle edge, edged in purple, between the head and the lateral lobes. Both species have a similar range of colour variations, as does Ceratosoma tenue, but they differ from each other externally by the lack of a mantle edge in Ceratosoma gracillimum and the extra pair of small lateral lobes in Ceratosoma tenue.

Ceratosoma tenue from Lembeh, IndonesiaIdentification reviewed by Nathalie Yonow
(136 photos)
 
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