A stunning example of a multi-ammonite fossil of the species Psiloceras planorbis from North Somerset, UK.
The matrix measures 158 mm (6.3 inches) across and contains two ammonites, which measure 58 mm and 47 mm, which is large for this species. It is unusual to find a piece with more than one ammonite of this species in. The shells sit in the original limestone matrix in which they were found that has been shaped and has a cut-flat base to allow it to be displayed freely standing. It weighs 460 grams.
The ammonites are well preserved and have been prepared out of the rock to reveal the full shells, which are pure white and stand out nicely against the grey background. There is an unusual bivalve shellfish that attached itself to one of the ammonites when it was lying on the Jurassic seafloor.
Around 200 million years old (Hettangian, Early Jurassic), this fossil would make a wonderful addition to any collection.