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Amynthas japonicus
Conservation status
Extinct  (IUCN 3.1)
Scientific classification
Domain:	Eukaryota
Kingdom:	Animalia
Phylum:	Annelida
Clade:	Pleistoannelida
Clade:	Sedentaria
Class:	Clitellata
Order:	Opisthopora
Family:	Megascolecidae
Genus:	Amynthas
Species:	†A. japonicus
Binomial name
†Amynthas japonicus (Horst, 1883)
Synonyms
Megascolex japonicus

Megascolecidae earthworm Amynthas japonicus is an extinct Japanese native probably collected from Nagasaki in the 1820s. It was one of three native earthworms featured in Dr P.F.B. von Siebold's extensive collection and recorded as one of Japan's earliest pheretimoid species. It is now deemed extinct given that a 2018 Nagasaki expedition and earlier 1930s reports failed to locate it. It is featured on The Recently Extinct Plants and Animals Database.

References

1. ^ Blakemore, R.J. (2018) . "Amynthas japonicus". IUCN Red List of Threatened Species. 2018: e.T118812839A135691617. doi:10.2305/IUCN.UK.2018-1.RLTS.T118812839A118818040.en. Retrieved 17 February 2023.
2. Blakemore, Robert J. "Japanese earthworms (Annelida: Oligochaeta): a review and checklist of species" (PDF). Senckenberg University. Archived from the original (PDF) on 2006-02-02.
3. Blakemore, Robert J. (December 2018). "Non-Flat Earth Recalibrated for Terrain and Topsoil". Soil Systems. 2 (4): 64. doi:10.3390/soilsystems2040064.
4. Blakemore, Robert J. "On Opening a Box of Worms (Oligochaeta, Megascolecidae) — Historical Earthworm Specimens Transferred to Tokyo from the Saito Ho-on Kai Museum of Natural History in Sendai" (PDF). Kahkahu.
5. Blakemore, Robert J. "Extinction of Japan's first formally described earthworm Amynthas japonicus(Horst, 1883) (Annelida, Oligochaeta, Megadrilacea, Megascolecidae)" (PDF). Kanagawa Museum.
6. "Amynthas japonicus - The Recently Extinct Plants and Animals Database (REPAD)". recentlyextinctspecies.com. Retrieved 2019-08-01.

• IUCN Red List extinct species
• Megascolecidae
• Nagasaki