A stunning example of an ammonite fossil of the species Xipheroceras dudressieri from the world-famous Jurassic Coast beach of Lyme Regis, Dorset UK.
The ammonite was found in a piece of limestone that was split open to reveal the both the positive cast of the ammonite and the negative impression of the shell. It can be put back together to be revealed as a surprise or with the two parts displayed separately.
The two pieces of rock matrix measure 185 mm (7.3 inches) and 180mm (7.1 inches) across and the fossil ammonite measures 67 mm (2.65 inches), which is a good size for this species. The ammonite is very well preserved and has been prepared out of the rock to reveal the whole shell. This species has a distinctive row of spines on the outer whorl, which are nicely displayed in this specimen. The ribs are very finely defined, and the colour is beautiful: a deep chocolate brown with detailed suture lines. There is also a small Promicroceras ammonite in the matrix.
A great example of the species and impressive in the flesh. The two pieces of rock combined weigh 4.175 kg and have a cut flat bases to allow them to stand freely for display.
Around 196 million years old (Sinemurian, Early Jurassic), this fossil would make a wonderful addition to any collection.