Microphysula cookei
| Microphysula cookei | |
|---|---|
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| shell of Microphysula cookei from its original description | |
| Scientific classification | |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Order: | Pulmonata |
| Suborder: | Eupulmonata |
| Infraorder: | Stylommatophora |
| Superfamily: | Helicoidea |
| Family: | Thysanophoridae |
| Genus: | Microphysula |
| Species: | M. cookei |
| Binomial name | |
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Microphysula cookei (Pilsbry, 1922) |
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| Synonyms | |
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Zonitoides cookei Pilsbry, 1922 |
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Zonitoides cookei Pilsbry, 1922
Microphysula cookei, common name the Vancouver snail, is a species of air-breathing land snail, a terrestrial pulmonate gastropod mollusk in the family Thysanophoridae.
The species Microphysula cookei was originally described as Zonitoides cookei by Henry Augustus Pilsbry in 1922.
Pilsbry's original text (the type description) reads as follows:
Zonitoides cookei n. sp. Fig. 1.
The shell is discoidal, the spire very slightly convex, umbilicus regularly diminishing inward, very nearly one-fourth the diameter of the shell; whitish, glossy, smoothish, under the microscope showing faint growth lines and on the upper surface an excessively minute, close and shallow spiral striation on the last 2 or 3 whorls. The whorls increase slowly and are rather convex, the suture rather deeply impressed, last whorl rounded peripherally. The aperture is rather narrow, crescentic. Height 1.7, diam. 3.6 mm.; 4 whorls.
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