Cephalopoda - Ammonitida - Sonniniidae
Alternative spelling: Euhoploceras
Synonyms: Nannoceras Buckman 1923, Sherbornites Buckman 1923, Stiphromorphites Buckman 1923
Full reference: S.S. Buckman. 1913. Yorkshire type ammonites : the original descriptions reprinted, and illustrated by figures. Volume II. Parts IX-XI. V-vii
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 altecostata, Sonninia alternata, Sonninia argentinica, Sonninia bodenbenderi, Sonninia crassa, Sonninia crassinuda, Sonninia espinazitensis, Sonninia fascicostata, Sonninia intumescens, Sonninia mirabilis, Sonninia nuda, Sonninia stelzneri, Sonninia subdeltafalcata, Sonninia subtrigonata, Sonninia tuxedniensis, Waagenia parrasensis
Subtaxa: Sonninia (Euhoploceras) acanthodes Sonninia (Euhoploceras) adicra Sonninia (Euhoploceras) berckhemeri Sonninia (Euhoploceras) bifurcata Sonninia (Euhoploceras) dominans 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 (6), the United Kingdom (3), United States (13: Alaska, California, Oregon)
Total: 52 collections including 76 occurrences