†Ludwigia (ammonite)
Cephalopoda - Ammonitida - Graphoceratidae
Synonyms: Cosmogyria Buckman 1898, Crickia Buckman 1899, Hyattia Buckman 1899, Kiliania Buckman 1899, Ludwigina Buckman 1899, Murchisonia Engel 1896 [objective synonym], Pseudographoceras Buckman 1899, Strophogyria Buckman 1899, Welschia Buckman 1898
Parent taxon: Graphoceratinae according to M. K. Howarth 2013
Sister taxa: Brasilia, Graphoceras, Hyperlioceras
Subtaxa: Ludwigia murchisonae
Ecology: fast-moving nektonic carnivore