Horidoceras Baugieri ammonite fossil collected from the Jurassic Oxford Clays of Oxford. Horidoceras is an extinct genus of ammonite which can be found in Mid to Upper Jurassic sediments. They were nektonic carnivores which fell to the sea floor upon death. These examples were preserved within an oxygen starved deep marine shelf which gave rise to the Oxford Clay Formation. These specimens only measure 1 cm in diameter however they are a rare find so are highly sought after by serious fossil collectors. Despite being small, they are very pretty ammonites with smooth evolute shells and very prominent, sharp tubercles along the ventral margin. Supplied in a small plastic bag with an information label.