Berthella aurantiaca
Berthella aurantiaca - frontal view
Berthella aurantiaca - head detail
Berthella aurantiaca - gill
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Berthella aurantiaca (Risso, 1818)
Medium sized species found under rocks. The general shape is oval with occasional folds on the notum. The oral veil is flattened and the rhinophores are folded. A foot is present extending slightly more than the notum. The overall colour is orange to orange-red without markings or other colour patches. A gill is present, visible on the right side of the body under the notum. A large internal shell is present.
Size range: 8-35mm

Specific characteristics: The distinct body colour is enough to identify this species from related Berthella species, however it may be difficult to separate from the paler coloured Berthellinia citrina, which may be distinguished by the small shell and the position of the anus relative to the gill.

Identification by Dr. A. Perrone
Links:
Marine species
Oral veil and rhinophores
35mm Ahrax point 3m depth 7/2/93
Lateral view showing gill
Frontal view of 35mm specimen
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PLEUROBRANCHOMORPHA
Pleurobranchidae