検索結果（標本）

Spirorbis perplanorbis (Yokoyama, 1927)   Holotype

Oyama, K., 1973   p. 121, pl. 4, fig. 18

Cenozoic | Mollusca : Gastropoda : Planorbidae

Material Reports, no. 9, p. 152.

Spirorbis perplanorbis (Yokoyama, 1927)   Holotype

Taki, I. & Oyama, K., 1954   pl. 48, fig. 14

Cenozoic | Mollusca : Gastropoda : Planorbidae

Material Reports, no. 9, p. 219.

Spirorbis tricarinatus (Yokoyama)   Holotype   Missing

Oyama, K., 1973   p. 122, pl. 4, fig. 20a-c

Cenozoic | Mollusca : Gastropoda : Planorbidae

Material Reports, no. 9, p. 145.

Spirorbis tricarinatus (Yokoyama)   Holotype   Missing

Taki, I. & Oyama, K., 1954   pl. 38, fig. 14,14a

Cenozoic | Annelida

Material Reports, no. 9, p. 212.