Buckman 1912, pl. 48, figs. 1, 1a.
Howarth 1962, p. 107.
Promicroceras? siphunculare (Simpson)
| GROUP : | Lower Jurassic Ammonite Species |
| STATUS : | Holotype |
| NUMBER : | WHITM:WM485.2 |
| HORIZON : | Lower Lias, Jurassic |
| LOCALITY : | Robin Hood's Bay, North Yorkshire |
| REFERENCES : | Simpson 1843, p. 46; 1855, p. 88; 1884, p. 126. Buckman 1912, pl. 48, figs. 1, 1a. Howarth 1962, p. 107. |
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