Planorbis corinna
Encyclopedia
Planorbis corinna, is a species
of minute freshwater air-breathing snail
, an aquatic
pulmonate gastropod mollusk, or micromollusk
in the family
Planorbidae
, the ram's horn snails, or planorbids. All planorbids have sinistral or left-coiling shells.
The shell is very minute, discoidal, with four slowly increasing whorls. The shell coloration is greenish-white to light brown.
The width of the shell is up to 3.3 mm, and the height is up to 0.8 mm.
Species
In biology, a species is one of the basic units of biological classification and a taxonomic rank. A species is often defined as a group of organisms capable of interbreeding and producing fertile offspring. While in many cases this definition is adequate, more precise or differing measures are...
of minute freshwater air-breathing snail
Snail
Snail is a common name applied to most of the members of the molluscan class Gastropoda that have coiled shells in the adult stage. When the word is used in its most general sense, it includes sea snails, land snails and freshwater snails. The word snail without any qualifier is however more often...
, an aquatic
Aquatic animal
An aquatic animal is an animal, either vertebrate or invertebrate, which lives in water for most or all of its life. It may breathe air or extract its oxygen from that dissolved in water through specialised organs called gills, or directly through its skin. Natural environments and the animals that...
pulmonate gastropod mollusk, or micromollusk
Micromollusk
A micromollusk is a descriptive term for a shelled mollusk which is extremely small, even at full adult size. The word is usually, but not exclusively, applied to marine mollusks, although in addition, numerous species of land snails and freshwater mollusks also reach adult size at very small...
in the family
Family (biology)
In biological classification, family is* a taxonomic rank. Other well-known ranks are life, domain, kingdom, phylum, class, order, genus, and species, with family fitting between order and genus. As for the other well-known ranks, there is the option of an immediately lower rank, indicated by the...
Planorbidae
Planorbidae
Planorbidae, common name the ramshorn snails or ram's horn snails, is a family of air-breathing freshwater snails, aquatic pulmonate gastropod mollusks....
, the ram's horn snails, or planorbids. All planorbids have sinistral or left-coiling shells.
Distribution
This species is endemic to New Zealand.Shell description
This species, like all planorbids, has a sinistral shell.The shell is very minute, discoidal, with four slowly increasing whorls. The shell coloration is greenish-white to light brown.
The width of the shell is up to 3.3 mm, and the height is up to 0.8 mm.