freshwater pearl mussel
An endangered species of freshwater mussel, Margaritifera margaritifera, capable of producing quality pearls.
a person from or inhabitant of Tuscany / a local variety of Italian spoken in Tuscany
(mycology) The trajectory of a basidiospore after it is discharged from a sterigma.
(archaic) Synonym of placard, a metal plate reinforcing the lower part of an armor breastplate or backplate.
保護活動家たちは川の生息地を修復して、良質な真珠を作ることができる絶滅危惧種の淡水二枚貝（Margaritifera margaritifera）の個体群が回復するように取り組んでいます。
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