Calliostoma blacki

Taxobox
name = "Calliostoma blacki"


image_caption =
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
ordo = Archaeogastropoda
familia = Calliostomatidae
genus = "Calliostoma"
species = "C. blacki"
binomial = "Calliostoma blacki"
binomial_authority = Powell, 1950
synonyms = "Venustas blacki" Powell, 1950

"Calliostoma blacki" is a medium-sized sea snail, a marine gastropod mollusc.

Some authors consider this genus to be in the family Calliostomatidae, other malacologists would place it simply in the family Trochidae, the top snails.

Distribution

This species is endemic to New Zealand. It is found off eastern Otago in the South Island.

Habitat

This top shell is found at depths of between 100 and 130 m.

hell description

The shell is large and solid, sculptured with numerous spiral cords. These cords are prominently granose over the upper part of the spire whorls and again, encircling the callus-filled umbilicus, but those in between are mostly smooth.

The external shell coloration is pink, which is a darker shade between the granules.

The shell height is up to 51 mm, and width is up to 51 mm.

References

* Powell A. W. B., "New Zealand Mollusca", William Collins Publishers Ltd, Auckland, New Zealand 1979 ISBN 0-00-216906-1