These genera have not been satisfactorily assigned to existing families:
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| Chiastosella conservata | Chiastosella daedala | Dightonia inarmata (thanks to Dennis Gordon and NIWA.) |
Escharina johnstoni |
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| Escharina pesanseris | Homalostega convexa (thanks to Dennis Gordon and NIWA. |
Jubella enucleata (thanks to Dennis Gordon and NIWA. |
Julianca retia (thanks to Dennis Gordon and NIWA. |
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| Neoeuthyris woosteri | Robertsonidra praecipua (thanks to Ann-Margret Amui, Research Institute Senckenberg). |
Stichopora pentasticha. | Taenioporina arachnoidea (thanks to Dennis Gordon and NIWA. |
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| Vibracella trapezoidea (thanks to Dennis Gordon and NIWA. |
Schizorthosecos interstitia at Invertebrate Fossils of Texas