Brookula prognata

Taxobox
name = "Brookula prognata"


image_caption =
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
subclassis = Orthogastropoda
superordo = Vetigastropoda
superfamilia = Trochoidea
familia = Cyclostrematidae
genus = "Brookula"
species = "B. prognata"
binomial = "Brookula prognata"
binomial_authority = Finlay, 1927
synonyms =

"Brookula prognata" is a species of minute sea snail, a marine gastropod mollusc in the family Cyclostrematidae.

Distribution

This species is endemic to New Zealand, found around the Three Kings Islands.

Habitat

This snail is found at depths of about 180 m.

hell description

The shell is minute, , thin, and umbilicate, sculptured with numerous, narrow, crisp, axial ribs, 36 to 40 on the last whorl terminated rather suddenly at about the lower third of the base, which is smooth from there into the deep rather narrow umbilicus. The spiral sculpture is of fine but distinct lirae, and it also terminates on the base, together with the axials.

Shell height is up to 0.9 mm, and the width is up to 0.95 mm.

References

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