A stunning example of an ammonite fossil of the species Promicroceras planicosta from the world-famous Jurassic Coast beach of Lyme Regis, Dorset UK.
The piece of limestone matrix measures 135 mm (5.3 inches) wide and the fossil ammonite measures 28 mm (1.1 inch) across, which is a good size for this species. The ammonite is perfectly preserved and has been prepared out of the rock to reveal the whole shell. The ribs are very finely defined and the mix of mottled colours is beautiful. A great example of the species and impressive in the flesh. The fossil weighs 840 grams and has a cut flat base to allow it to stand freely on its own for display.
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.