Mikadotrochus beyrichii, common name Beyrich's slit shell, is a species of sea snail, a marine gastropod mollusk in the family Pleurotomariidae.[2]
| Mikadotrochus beyrichii | |
|---|---|
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| Drawing with an apertural view of Mikadotrochus beyrichii | |
Scientific classification 
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| Domain: | Eukaryota |
| Kingdom: | Animalia |
| Phylum: | Mollusca |
| Class: | Gastropoda |
| Subclass: | Vetigastropoda |
| Order: | Pleurotomariida |
| Family: | Pleurotomariidae |
| Genus: | Mikadotrochus |
| Species: | M. beyrichii
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| Binomial name | |
| Mikadotrochus beyrichii (Hilgendorf, 1877) [1]
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| Synonyms | |
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It was discovered by Franz Martin Hilgendorf in an ancient Japanese collection.
Description
editThe 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]
Distribution
editM. beyrichii is endemic to the coastal waters of Japan.[4] and China
_-_Pleurotomariidae_-_Mollusc_shell.jpeg)
References
edit- ^ Hilgendorf in Sitzungsb. d. Gesellsch. Naturf. Freunde Berlin, 1877, p. 72.
- ^ Mikadotrochus beyrichii (Hilgendorf, 1877). Retrieved through: World Register of Marine Species on 14 March 2013.
- ^ G.W. Tryon (1890), Manual of Conchology vol. XII, p. 71 (described as Pleurotomaria beyrichii)
- ^ Oliver, A.P.H. (2004). Guide to Seashells of the World. Buffalo: Firefly Books. 17.
- Dautzenberg, Ph.; Fischer, H. (1898). Note sur le Pleurotomaria beyrichi. J. conchyliol. XLVI: 218–224, plate XI
- Williams S.T., Karube S. & Ozawa T. (2008) Molecular systematics of Vetigastropoda: Trochidae, Turbinidae and Trochoidea redefined. Zoologica Scripta 37: 483–506
External links
edit
- "Mikadotrochus beyrichii". Gastropods.com. Retrieved 16 January 2019.