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

Foot of Trivia arctica. Upper part of image split by surface refraction. Menai Strait, Wales, August 2010

Species

Photographer / copyright holder

I.F. Smith

Trivia arctica with mantle fully expanded. Dark marks near the yellow edges of the mantle should not be confused with the dark marks found on the dorsum of the shell of T. monacha.

Species

Photographer / copyright holder

I.F. Smith

Trivia arctica with mantle half retracted. Dark marks frequent on edge of mantle but never on the shell. Usually less common live on shore than T. monacha, but 100+ seen on a shore on Menai Strait, Wales August 2010.

Species

Photographer / copyright holder

I.F. Smith

Lamellaria latens. Upper surface of foot. Length 10mm. In Laminaria holdfast, LWS, Menai Strait, Wales. February 2011

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith

Dorsal view of L. latens head. Head has eyes, obliquely held smooth tentacles and no snout. Length 10mm. In Laminaria holdfast, LWS, Menai Strait, Wales. Feb.2011.

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith

Lamellaria latens. Sole of foot with slit across anterior. Underside of mantle and head with diagnostic opaque white marks , obliquely held tentacles and no snout. Length 10mm. In Laminaria holdfast, LWS, Menai Strait, Wales. Feb.2011

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith

Lamellaria latens. Mantle flexed up to expose side of head, underside of mantle with light grey stipple, and foot. Length 10mm. In Laminaria holdfast, LWS, Menai Strait, Wales. Feb.2011.

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith

Lamellaria latens. Mantle flexed upwards, and partly uncurled siphon. L. latens often holds its tentacles at an obtuse angle to each other. Length 10mm. In Laminaria holdfast, LWS, Menai Strait, Wales. Feb.2011

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith

Comparison of usual adult sizes of L. latens (10mm, on left ) and L. perspicua (20mm, on right) at same scale. L. latens often holds its tentacles at a more obtuse angle to each other than L. perspicua.

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith

Lamellaria latens.White markings with grey discs and fine sepia spots of this specimen resemble its compound ascidian prey, such as Trididemnum, with exhalent openings and small inhalent pores. Length 10mm. In Laminaria holdfast, LWS, Menai Strait, Wales.

Species

Lamellaria latens

Photographer / copyright holder

I.F. Smith