Simpson 1884, p. 71
Buckman 1924, pl. 491
Incorrect image removed 5th August 2002
Howarth 1962, p. 111
Gemmellaroceras? tubellum (Simpson)
| GROUP : | Lower Jurassic Ammonite Species |
| STATUS : | Holotype |
| NUMBER : | WHITM:SIM981 |
| HORIZON : | Lower Lias, Jurassic |
| LOCALITY : | Robin Hood's Bay, North Yorkshire |
| REFERENCES : | Simpson 1855, p. 42 Simpson 1884, p. 71 Buckman 1924, pl. 491 Incorrect image removed 5th August 2002 Howarth 1962, p. 111 |
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