Berthella plumula | The Conchological Society of Great Britain and Ireland

<p><em>Berthella plumula</em> (Montagu, 1803)</p>

Berthella plumula with gill well exposed and oral veil expanded. Eastbourne, East Sussex, England. October 1988.

Species

Berthella plumula

Photographer / copyright holder

E. Jones

Berthella plumula. Length 28mm. m: underside of mantle. r: rhinophore. v: oral veil. c: cleft in foot. o: genital opening. g: single corrugated gill attached for two thirds of its length to the right side of body. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Length 28mm. Sole smooth, paler than dorsal surface of mantle. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Length of animal 28mm. Oral veil expanded laterally into wide flat bilaminate oral tentacles slit open at the sides. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Internal shell; height (longest dimension) 1.5mm, from juvenile animal 2mm long. Spire, apart from final whorl, about a third of shell height, and aperture less than height, at this early growth stage. LWS. Menai Strait, April 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula.Length 28mm. Mantle conceals most of foot. Reticulation on mantle resembles lobules of Oscarella (encrusting sponge); not as distinct as on translucent white specimens. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Length 28mm. g : gill protruding from below mantle. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Length 28mm. Mantle, lacking tubercles, covers whole body except protruding rhinophores, large oral veil and small portions of foot. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Internal shell; height (longest dimension) 5.5mm, from animal 13mm long. Large final whorl; rest of spire relatively very small. Yellowish shell mostly covered by white layer. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

Berthella plumula. Length 13mm. Pair of enrolled rhinophores project forwards between mantle and oral veil. LWS. Menai Strait, Wales. March 2011.

Species

Berthella plumula

Photographer / copyright holder

I.F. Smith

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