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Description

 A pyramidal top shell, similar in shape to Calliostoma zizyphinum but Jujubinus striatus is less broad and up to about 10 mm high and 8 mm broad. The shell has 6 whorls with 8-10 smooth concentric ridges between the keels of each whorl. The last whorl and the aperture are both relatively large and can be up to two thirds of the overall height of the shell. The aperture is obliquely oval and often pink. The outer colour of the shell can be extremely variable but is usually coffee or chocolate brown with cream or white areas of different sizes. Other colours include greyish-white, yellowish or greenish and the apical region can be a carmine red. Occasionally, individuals are all red. Broad bands of colour and white may alternate giving a chequered pattern. A small hole found on the underside in the centre of the whorls (umbilicus) is open in young shells and closed in adult shells. The foot has 3 pairs of epipodial tentacles.Jujubinus striatus is very similar to Jujubinus exasperatus which is one of three other species of Jujubinus recorded in Britain although none is common. Jujubinus striatus has apparently disappeared from many sites where it was formally common as there are no recent records.

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©  The Marine Biological Association of the United Kingdom

Source: Marine Life Information Network

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