Vaugonia yokoyamai f. gracilis Kobayashi & Mori
| 1955. | Vaugonia yokoyamai f. gracilis Kobayashi & Mori Holotype Kobayashi, T. & Mori, K. 1955 p. 81, pl. 3, fig. 9 |
| Condition: | Present |
| Taxonomy: | Mollusca: Bivalvia: Trigoniidae: |
| Geologic Time: | Mesozoic: |
| Kobayashi, T. and Mori, K., 1955: The Vaugoniinae from the Kitakami mountains in north Japan. On the Jurassic trigonians in Japan, Part 3. Japanese Journal of Geology and Geography, vol. 26, nos. 1–2, pp. 73–88, pls. 3–4. (Reference No. 0201) |
 PDF in prep. |
| Ichikawa, T. and Hayami, I., 1978, no. 2, p. 194. |
