BEAUTIFULLY PRESERVED PERISPHINCTID AMMONITE - JURASSIC, MADAGASCAR.

Dichotomosphinctes sp.

Perfect matrix free specimen. To protoconch both sides. Shows strong bifurcating ribs. Just about as good as they ever come.

Jurassic, Callovian.
Tulear, Madagascar.

Ammonite : 7.2 cm diam.