This species has been observed on Rodrigues Island
Superfamily : Oxynooidea
Distribution : Ceylan, Chagos and Rodrigues
Maximal size :
Species characteristics :
It has a large, weakly calcified, bulloid-shaped shell. At its posterior end, the shell narrows into a funnel or spout
The shell is more overlap than in Volvatella cf. vigourouxi and the funnel or spout shorter.
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Photo Raymond Huet
Rodrigues, Shell size : 11 mm, 2015
Identification confirmed by Raymond Huet
The identity of species from the Indo-West Pacific is difficult to resolve as many of the early descriptions are very brief.
For some author, this species from Ceylon is also most probably a synonym of V. vigourouxi, which would indicate that it has a wide distribution in the Indian and Pacific Oceans.
Synonymous (according worms):
- No other name
Bibliographic data :
The foot is relatively short and the head bears a pair of rounded oral lobes and a pair of somewhat flattened, rounded rhinophores.
Species are found in association with their food, the green siphonaceous algae, Caulerpa, on which they are well camouflaged.
When disturbed a sticky white secretion is released from a gland in the mantle cavity
The egg mass is a flattened disk laid on seaweed.
In South West Indian Ocean, we found two different kind of shell, so probably two different species : Volvatella cf. cincta and Volvatella cf. vigourouxi
Volvatella cf. cincta
Volvatella cf. vigourouxi
At its posterior end, the shell narrows into a short (a) funnel or spout.
Important overlapping (b) on the ventral face of the shell
At its posterior end, the shell narrows into a long (a) funnel or spout.
No overlapping (b) on the ventral face of the shell
Gastropod.com Volvatella cincta
Sheppard, A (1984). The molluscan fauna of Chagos (Indian Ocean) and an analysis ot its broad distribution patterns. Coral Reefs 3: 43-50
Other photos of Volvatella cf. cincta :
More photos from Indian Ocean
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