Cephalopoda - Ammonitida - Sonniniidae

Synonyms: Darellella Buckman 1904, Nannina Buckman 1927, Nannoceras Buckman 1923

Parent taxon: Witchelliinae according to M. K. Howarth 2013

Sister taxa: Asthenoceras, Guhsania, Newmarracarroceras, Witchellia

Subtaxa: none

Ecology: fast-moving nektonic carnivore