Berthella martensi

(Pilsbry, 1896)

Berthella martensi
Photographed by: Edward Blackshaw

Kingdom:Animalia
Phylum:Mollusca
Class:Gastropoda
Subclass:Opisthobranchia
Order:Pleurobranchida
Family:Pleurobranchidae
Species:Berthella martensi

Comment from Nathalie Yonow on photo #27191
You can see the gill on the right side where the mantle came off - great shot.

Comment from Nathalie Yonow on photo #4831
Good view of the gill.

Comment from Nathalie Yonow on photo #9188
... missing its posterior part.

Comment from Richard Willan on photo #24520
This individual is a most unusual pale colour form, but the indentation between the two anteriormost preformed sheer zones, which characterise this species, is easily visible immediately behind the rhinophores.

Comment from Richard Willan on photo #10367
This is definitely Berthella martensi. It’s easy to see the 3 preformed sheer zones on the mantle which are absolutely characteristic of Berthella martensi.

Comment from Richard Willan on photo #11112
This is an atypical individual with an unusually dark brown body and just a few white spots.

Comment from Richard Willan on photo #9087
A juvenile individual

Comment from Richard Willan on photo #7768
Detail of the head of a dark-coloured individual from face-on. The front of the foot is lifted up off the ground like a funnel.

Comment from Richard Willan on photo #4630
This individual (of the very dark colour form) has cast off all three sections of its mantle, so only the very small central section is remaining and the gill is completely exposed.

Comment from Richard Willan on photo #4629
This individual (of the very dark colour form) has cast off all three sections of its mantle, so only the very small central section is remaining and the gill is completely exposed.

Comment from Richard Willan on photo #1914
This species is incredibly variable in terms of coloration, but all individuals have the 3 “shear zones” on the mantle. I cannot make out if these shear zones are present on this individual and, furthermore, it is unusual in having raised pustules, so it might be an undescribed species.

Comment from Richard Willan on photo #749
Berthella martensi has an extraordinarily large intraspecific variation in colour. If it weren’t for the ‘preformed shear zones’ on the mantle it would be easy to think there were many species.

Comment from Nathalie Yonow on photo #2586
Berthella martensi comes in a range of colours, but this one is typical, but they can be almost colourless with brown spots. They can also lose parts of their mantle when threatened, so the result is some very odd looking sea slugs.

Locality:

 

Pictures of Berthella martensi

Berthella martensi from MalaysiaIdentification reviewed by Richard Willan
Location: Malaysia
Posted 9 years ago
Viewed 1638 times
 
 
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