| On this piece from Lyme Regis are a larger and a small ammonite of the species Promicroceras planicosta. | |||
Location: | Lyme Regis, Dorset, England, UK | ||
| Ammonites diameter: | about 22 & 10 mm | ||
| Age: | Lower Jurasic , Lias,Sinemurian, Green Ammonite Beds (about 175 Mill. Years) | ||