Mikadotrochus beyrichii
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| Mikadotrochus beyrichii | |
|---|---|
 | |
| Drawing with an apertural view of Mikadotrochus beyrichii | |
Scientific classification  | |
| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Pleurotomariida |
| Family: | Pleurotomariidae |
| Genus: | Mikadotrochus |
| Species: | M. beyrichii |
| Binomial name | |
| Mikadotrochus beyrichii (Hilgendorf, 1877) [1] | |
| Synonyms | |
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Mikadotrochus beyrichii, common name Beyrich's slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae.[2]
It was discovered by Franz Martin Hilgendorf in an ancient Japanese collection.
The size of the shell varies between 50 mm and 100 mm. The shell has a trochiform shape. It is as high as broad. It has a flat base. It shows moderately numerous spiral lines. It is pale yellow, beautifully flamed with 11 red whorls that are regularly increasing. The penultimate whorl has 8 lirae above, 2 in and 2 under the slit fasciole. These lirae are beset with weak nodules, about 3 times as long (in the direction of the spiral) as high or broad. The body whorl has a blunt angle at its base. This base contains 20 concentric lirae, and in the middle a deep pit or "false umbilicus". On the outside it is white, on the inside it is pearly. The thick, pearly columellar margin is S-shaped.[3]
_-_Pleurotomariidae_-_Mollusc_shell.jpeg)
