Ferrissia neozelanica
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Ferrissia neozelanica, also known as Gundlachia neozelanica, is a species of small freshwater limpet, an aquatic pulmonate gastropod mollusk, or micromollusk, in the family Planorbidae.
As of 2014, this species was listed in the IUCN Red list twice: as Gundlachia neozelanica - data deficient[1] and as Ferrissia neozelanicus - least concern.[2]
Shell description
Shell depressed conoidal, oval-oblong, the sides straightened, subparallel, thin, semitransparent, horn-colour, with a blackish-green coating. Apex a little inclined to the right, situated at the posterior sixth of the length, flatly convex anteriorly; concentric lines of growth at regular intervals. Interior light brown, shining. Aperture is elongated oval, slightly broadened anteriorly. Specimens have been found with the septum partly formed, but not adult.[3]
The shell length is up to 3 mm, the width up to 2 mm, and height up to 0.75 mm.[4]
Anatomy
These animals have a pallial lung, as do all pulmonate snails, but they also have a false gill or "pseudobranch". This serves as a gill as these limpets may sometimes not be able to reach the surface for air.
Distribution
This freshwater limpet is endemic to the South Island of New Zealand.[4]
Habitat
These tiny limpets are found attached to stems and undersides of leaves of aquatic plants in quiet waters.
References
This article incorporates public domain text from the reference[3]
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- ↑ a b Suter H. (1913). Manual of the New Zealand Mollusca. Wellington.
- ↑ a b Powell A. W. B. (1979). New Zealand Mollusca. William Collins Publishers Ltd, Auckland, New Zealand, Template:ISBN
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