Calliostoma turnerarum

Taxobox
name = "Calliostoma turnerarum"


image_caption =
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
ordo = Archaeogastropoda
familia = Calliostomatidae
genus = "Calliostoma"
species = "C. selectum"
binomial = "Calliostoma selectum"
binomial_authority = Powell, 1964

"Calliostoma turnerarum" is a species of medium-sized deepwater sea snail, a marine gastropod mollusc.

Some authors have placed this genus in the family Calliostomatidae, the Calliostoma top snails, but most malacologists now prefer to leave the genus in the family Trochidae, the top snails.

Distribution

This species is endemic to New Zealand. It is found around Mayor Island in the Bay of Plenty in the North Island.

Habitat

This top shell lives at depths of about 200 m.

hell description

The shell is large, thin and broad, with a spire angle of between 80° and 95°. The upper whorls are lightly convex, but the last whorl is strongly convex, and with a sharp ridge at the periphery. A white parietal callus is broadly smeared over the umbilical area.

Coloration is pale brownish-buff above and whitish below, with a reddish-brown pattern, confined to the spiral cords, in the form of dashes, arranged roughly in radiate series.

Shell height is up to 42 mm, and width up to 56 mm.

References

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