The Conchological Society of Great Britain and Ireland | Helping to understand, identify, record, and conserve molluscs

Rostanga rubra. Length 10mm. Digital oral tentacles. Mantle wider than foot, underside uniformly coloured with no markings. Foot anterior bilaminate, upper layer slit. Menai Strait, Wales. February 2013.

Species

Photographer / copyright holder

I.F. Smith

Rostanga rubra. Line of buoyant faeces being ejected from brown tubular anus. Erect gills arise from three prone brown arms originating from base of anus. Mantle orange with sparse scattered reddish brown spots. Menai Strait, Wales. February 2013.

Species

Photographer / copyright holder

I.F. Smith

Rostanga rubra rhinophore with 9 large lamellae, deeply and widely parted down posterior and anterior. Mottled opaque white with a few reddish brown spots. Large whitish caryophyllidia near rhinophore base. Menai Strait, Wales. Feb. 2013.

Species

Photographer / copyright holder

I.F. Smith

Rostanga rubra. Length 10mm. Sides almost parallel. Conspicuous transverse white stripe (incomplete on this specimen) from rhinophore to rhinophore. Protruding foot translucent yellowish white. Menai Strait, Wales. February 2013.

Species

Photographer / copyright holder

I.F. Smith

Rostanga rubra. Length 10mm. Perimeter of mantle beaded with white spots. Unipinnate gills rise to form narrow cylinder. Foot extends at posterior when moving. Rhinophores thickened by large lamellae. Menai Strait, Wales. February 2013.

Species

Photographer / copyright holder

I.F. Smith

Onchidoris bilamellata. Length 13mm. Head has large, curved, oral veil, often with wavy edge, white with slight yellow tint. Foot translucent white showing yellow or purple viscera, anterior smoothly curved, no indentation by mouth. Feb. 2013. Menai Str.

Species

Onchidoris bilamellata

Photographer / copyright holder

I.F. Smith

Onchidoris bilamellata. Length 13mm. Bulbous base of rhionophore recessed in pit. February 2013. Menai Strait, Wales.

Species

Onchidoris bilamellata

Photographer / copyright holder

I.F. Smith

Onchidoris bilamellata. Length 13mm. Round-headed, large and small club-shape tubercles cover mantle. Up to 16 oblique lamellae on rhinophores. Gills unipinnate. February 2013. Menai Strait, Wales.

Species

Onchidoris bilamellata

Photographer / copyright holder

I.F. Smith

Doto coronata. Body length 12mm. Dark crimson on head, body and subepidermally on lower half of mesial face of cerata. Anal papilla between first & second ceras on right. 6 pairs of cerata (fifth on right missing). February 2013. Menai Strait. Wales.

Species

Photographer / copyright holder

I.F. Smith

Doto coronata. Body length 12mm. p: pseudobranchs on mesial faces of cerata (often absent or indistinct). Five circles of tubercles on some cerata (often maximum is 4). Subepidermal dark crimson in lower mesial face. Feb. 2013. Menai Strait.

Species

Photographer / copyright holder

I.F. Smith