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 Musandam, Oman
Location: Musandam, Oman
Posted 5 years ago
Viewed 1391 times
Ceratosoma trilobatum from Lembeh, Indonesia
Posted 5 years ago
Viewed 681 times
Ceratosoma trilobatum from Koh Phi Phi, Thailand
Posted 5 years ago
Viewed 804 times
Ceratosoma trilobatum from Koh Phi Phi, Thailand
Posted 5 years ago
Viewed 1188 times
Ceratosoma trilobatum from Kilifi Creek, Kenya
Posted 5 years ago
Viewed 1302 times
Ceratosoma trilobatum from Malapascua, Philippines
Posted 5 years ago
Viewed 874 times
Ceratosoma trilobatum from Timor-Leste
Location: Timor-Leste
Posted 5 years ago
Viewed 1011 times
Ceratosoma trilobatum from Koh Phi Phi, Thailand
Posted 5 years ago
Viewed 1795 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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