Protozoa - Nassellaria - Xitidae
Parent taxon: Eucyrtidiacea according to P. De Wever et al. 2001
See also Kiessling 1995
Sister taxa: Bekomidae, Eucyrtidiidae, Eucyrtiidae, Lophocyrtiidae, Obeliscoitidae, Pseudodictyomitridae, Theocotylidae
Subtaxa: Antexitus Clavaxitus Crolanium Foremanina Neorelumbra Novixitus Praexitus Pseudodictyomitrella Pseudoxitus Xitus
Ecology: passively mobile planktonic omnivore
Distribution:
• Cretaceous of Austria (9 collections), Azerbaijan (4), Canada (1: Nunavut), Costa Rica (1), Denmark (2), Germany (5), Greece (6), India (1), Italy (87), Japan (21), Malaysia (13), North Pacific (1), Oman (16), the Philippines (1), Poland (5), the Russian Federation (14), Trinidad and Tobago (1), Türkiye (5), United States (18: California)
• Jurassic to Cretaceous of Austria (1), Oman (1), Türkiye (1)
• Jurassic of Albania (15), Austria (10), Germany (6), Greece (1), Italy (17), Japan (25), New Zealand (1), Nicaragua (1), the Philippines (2), the Russian Federation (21), Slovakia (5), Switzerland (3), United States (21: California, Oregon)
Total: 342 collections including 779 occurrences