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There is a predation bite in the outer whorl where a Jurassic predator bit into the ammonite and killed it
Crinoids are echinoderms closely related to starfish and sea urchins
The whole piece weighs 100 grams
The fossil consists of multiple stem sections with detailed attachment cirri and a partial head with flowing arms and pinnules seemingly frozen in time
The shell sits in the original limestone matrix in which it was found that has been shaped and has a cut-flat base to allow it to be displayed freely standing
Calcite Promicroceras ammonite fossil display piece (20 mm) iridescent There is a predation biteA 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 60 mm (2. 3 inches) tall and the fossil ammonite measures 20 mm (0. 8 inches). The ammonite is very well preserved and has been prepared out of the rock to reveal the shell. The ribs are finely defined, and the mixed yellow and grey colour is beautiful. There is a
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