Family Arachnidiidae Hincks 1880 (bryozoan)

Gymnolaemata - Ctenostomata - Arachnidiidae

Parent taxon: Ctenostomata according to P. D. Taylor and M. A. Wilson 1999

See also Bassler 1953

Sister taxa: Arachnoidella, Ascodictyidae, Cardiarachnidium, Carnosa, Casteropora, Cookobryozoon, Euctenostomata, Fischerella, Foraripora, Haimeina, Harmeriella, Marcusopora, Paludicellea, Ropalonariidae, Stolonicella, Stolonifera, Vesicularina, Vinellidae, Voigtella

Subtaxa: Arachnidium Simplicidium

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Type: Arachnidium

Ecology: stationary epifaunal suspension feeder

Distribution:

• Cretaceous of Ukraine (1 collection)

• Jurassic of United States (1: Utah)

Total: 2 collections each including a single occurrence

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