Wikipedia
Darellia
Darellia is an extinct genus included in the ammonite family Graphoceratidae that lived during the Bajocian stage of the middle Jurassic.
Darellia may be a junior synonym for Hyperflioceras which has been found in Jurassic of Luxembourg, Spain, the United Kingdom, and Saudi Arabia.
Brasilia, Graphoceras, and Ludwigia are related genera.