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MarBEF Data System |
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ERMS taxon details
original description
Gofas S. (2007). Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts. <i>Journal of Natural History 41(13–16)</i>: 779–885
page(s): 784-787 [details]
original description
(of Pusillina (Pusillina) fuscapex Gofas, 2007) Gofas S. (2007). Rissoidae (Mollusca: Gastropoda) from northeast Atlantic seamounts. <i>Journal of Natural History 41(13–16)</i>: 779–885
page(s): 784-787 [details]
From editor or global species database
Biology Type of larval development: direct (non planktotrophic) [details]
Diagnosis Shell 2 to 2.4 mm high, with paucispiral protoconch and 3 to 4.5 moderately convex teleoconch whorls; faint sculpture of weak axial wrinkles and minute spiral striae, the latter absent on the periumbilical area. One spiral cord continuing the suture and marking a faint keel on the body whorl. Outer lip orthocline, with a thin edge, smooth and not thickened inside. Shell colour with a brown stain on the first protoconch whorl, the remainder entirely whitish of buff, translucent (on Atlantis seamount), with extremely faint brownish axial flames which become more definite near the abapical suture and along the periphery of the body whorl (on Hyères seamount), or uniformly a pale golden brown (some specimens from Meteor seamount).
This rather featureless species is easily recognized by the coloured apex, unusual among the seamount Rissoids. Its position in Pusillina, rather than in the look-alike Pseudosetia, is supported by the presence of a minute pallial tentacle on the right side and none on the left side. [details]
Distribution Great Meteor seamount, rare in 290-380 m; Hyères seamount, common in 310-480 m; Atlantis seamount, common in 280-420 m. Endemic to these seamounts, with some morphological differentiation between Meteor, Hyères and Atlantis. [details]
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