Simpson 1884, p. 73
Buckman 1910, pl. 19, fig. 1
Howarth 1962, p. 106.
Echioceras exortum (Simpson)
| GROUP : | Lower Jurassic Ammonite Species |
| STATUS : | Figured |
| NUMBER : | WHITM:SIM645.1 |
| HORIZON : | Lower Lias, Jurassic |
| LOCALITY : | Robin Hood's Bay, North Yorkshire |
| REFERENCES : | Simpson 1855, p. 44 Simpson 1884, p. 73 Buckman 1910, pl. 19, fig. 1 Howarth 1962, p. 106. |
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