Cephalopoda - Ammonitida - Tetragonitidae
Alternative spelling: Mesogaudryceras
Parent taxon: Gaudryceras according to W. J. Kennedy et al. 2024
See also Arkadiev et al. 2000, Hoffmann 2010, Kennedy 1994, Sepkoski 2002, Wright et al. 1996 and Wright and Kennedy 1984
Sister taxa: Gaudryceras (Gaudryceras), Gaudryceras aenigma, Gaudryceras beantalyense, Gaudryceras crassicostatum, Gaudryceras hamanakense, Gaudryceras hobetsense, Gaudryceras izumiense, Gaudryceras kayei, Gaudryceras makarovense, Gaudryceras mamiyai, Gaudryceras mite, Gaudryceras numidum, Gaudryceras propemite, Gaudryceras seymouriense, Gaudryceras stefaninii, Gaudryceras striatum, Gaudryceras tenuiliratum, Gaudryceras tombetsense, Gaudryceras varagurense, Lytoceras (Gaudryceras) alamedense, Lytoceras (Gaudryceras) delvallense, Lytoceras (Gaudryceras) neptunium, Lytoceras (Gaudryceras) texanum, Vertebrites murdochi, Gaudryceras (Neogaudryceras) pictum
Subtaxa: Gaudryceras (Mesogaudryceras) leptonema
Type: Ammonites leptonema
Ecology: fast-moving nektonic carnivore
Distribution:
• Cretaceous of France (1 collection), Germany (2), Greenland (2), Ukraine (2), the United Kingdom (1)
Total: 8 collections each including a single occurrence