Cephalopoda - Ammonitida - Sonniniidae
Alternative spelling: Euhoploceras
Synonyms: Nannoceras Buckman 1923, Sherbornites Buckman 1923, Stiphromorphites Buckman 1923
Parent taxon: Sonninia according to J. Sandoval 2022
See also Galácz 2015, Howarth 2013, Sepkoski 2002 and Westermann 1969
Sister taxa: Sonninia (Alaskinia), Sonninia (Papilliceras), Sonninia (Poecilomorphus), Sonninia (Sonninia), Sonninia deltafalcata
Subtaxa: Sonninia (Euhoploceras) adicra Sonninia (Euhoploceras) berckhemeri Sonninia (Euhoploceras) bifurcata Sonninia (Euhoploceras) nannomorpha Sonninia (Euhoploceras) playfordi Sonninia (Euhoploceras) polyacantha Stiphromorphites schucherti
Ecology: fast-moving nektonic carnivore
Distribution:
• Jurassic of Australia (4 collections), Canada (12: British Columbia, Yukon), Chile (1), China (1), Hungary (2), Italy (1), Morocco (9), Saudi Arabia (4), the United Kingdom (1), United States (13: Alaska, California, Oregon)
Total: 48 collections including 66 occurrences