Overview

Comprehensive Description

Description

 Calliostoma zizyphinum has a regularly conical, straight sided shell, up to 3 cm high and 3 cm broad, with a sharp apex and a flat base. The shell has regular spiral grooves and ridges and up to 12-13 whorls. The shell is very 'clean' and can be yellowish, pale pink or violet with streaks and blotches of brown, red or purple. Occasionally, individuals are white. The body tissue is also colourful and may be flecked with purple, crimson, reddish brown and yellow. The foot has 4-5 pairs of epipodial tentacles.The white morph Calliostoma zizyphinum, var. lyonsi, is sometimes considered a separate species (Fretter & Graham, 1994).
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Source: Marine Life Information Network

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Description

This topshell has a straight-sided conical shell, usually with markings in pink and red. A white form lyonsii is common at some localities, especially in strong tidal streams. Juveniles could be confused with other topshells such as Clelandella clelandi.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Distribution

Widely distributed all round the British Isles.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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Ecology

Habitat

Depth range based on 722 specimens in 1 taxon.
Water temperature and chemistry ranges based on 120 samples.

Environmental ranges
  Depth range (m): 0 - 141.35
  Temperature range (°C): 7.242 - 12.348
  Nitrate (umol/L): 2.892 - 8.618
  Salinity (PPS): 34.218 - 35.363
  Oxygen (ml/l): 6.013 - 6.665
  Phosphate (umol/l): 0.333 - 0.626
  Silicate (umol/l): 2.114 - 5.019

Graphical representation

Depth range (m): 0 - 141.35

Temperature range (°C): 7.242 - 12.348

Nitrate (umol/L): 2.892 - 8.618

Salinity (PPS): 34.218 - 35.363

Oxygen (ml/l): 6.013 - 6.665

Phosphate (umol/l): 0.333 - 0.626

Silicate (umol/l): 2.114 - 5.019
 
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 Calliostoma zizyphinum is found on seaweed covered rocky shores from extreme low water to 300 m depth in the sublittoral.
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Predominantly a sublittoral species, almost ubiquitous on rocky substrata where it feeds on a variety of sessile invertebrates, especially hydroids.
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Source: Encyclopedia of Marine Life of Britain and Ireland

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