Dactylioceras commune, ammonite Troodon but took only a few

but took only a few photographs of the first specimen of this species before it was sold

Agriotherium was along with the short-faced bear

who had received it in lieu of payment for medical treatment

recognized its importance and published his discovery in the journal Nature in 1925

Dactylioceras commune, ammonite Troodon but took only a fewDactylioceras was a widespread genus of ammonite from the Lower Jurassic period. They are generally small, averaging 2. 6 inches in diameter. Dactylioceras has a strong, ribbed shell. The ribs are slightly inclined forward, running over the outer edge, and either simple or forking at outer end. Though it eventually died out 180 million years ago, their style of ribbing was copied by numerous subsequent ammonite genera until the whole group became