A stunning example of a calcite ammonite fossil of the species Microderoceras birchi from the world-famous Jurassic Coast beach of Lyme Regis, Dorset UK.
The piece of limestone matrix measures 170 mm (6.7 inches) wide and the main fossil ammonite measures 45 mm (1.75 inches) across. The ammonite is very well preserved and has been prepared out of the rock to reveal the whole shell. This species has a distinctive double row of spines on whorls. The ribs are very finely defined, and the colour is beautiful: a rich honey yellow. There are also some smaller ammonites of the same species in the matrix. A great example of the species and impressive in the flesh. The fossil weighs 2685 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