Buckman 1918, pl. 112.
Jaworski 1931, p. 114, fig. 4, pl. 5, figs. la, b.
Howarth 1962, p. 103.
Arnioceras semicostatum (Young and Bird)
| GROUP : | Lower Jurassic Ammonite Species |
| STATUS : | Holotype |
| NUMBER : | WHITM:SIM924 |
| HORIZON : | Lower Lias, Jurassic |
| LOCALITY : | Robin Hood's Bay, North Yorkshire |
| REFERENCES : | Young and Bird 1828, p. 257, pl. 12, fig. 10. Buckman 1918, pl. 112. Jaworski 1931, p. 114, fig. 4, pl. 5, figs. la, b. Howarth 1962, p. 103. |
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