Incisura lytteltonensis

Taxobox
name = "Incisura lytteltonensis"
status =
regnum = Animalia
phylum = Mollusca
classis = Gastropoda
subclassis = Prosobranchia
ordo = Archaeogastropoda
superfamilia = Fissurelloidea
familia = Fissurellidae
genus = "Incisura"
species = "I. lytteltonensis"
binomial = "Incisura lytteltonensis"
binomial_authority = (E. A. Smith, 1894)
synonyms = "Scissurella lytteltonensis" E. A. Smith, 1894

"Incisura lytteltonensis" is a species of keyhole limpet, a marine gastropod mollusc in the family Fissurellidae.

Distribution

This species is endemic to New Zealand, including The Snares and the Chatham Islands.

Habitat

This keyhole limpet is found on seaweeds.

hell description

The shell is minute, thin, sub, smooth and white. The protoconch is small, microscopically delicately radiately ribbed, and only one large, rapidly expanded post-nuclear whorl. The aperture is very large, the outer lip thin and sharp, the inner lip broadly spreading. The slit is very short, situated well above the periphery, and with an even shorter, tapered furrow, leading into it externally, but otherwise there is no fasciole. An operculum is absent.

The shell height is up to 1 mm, and length 1.3 mm.

References

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