Parent taxon: Problematica according to J. J., Jr. Sepkoski 2002
Sister taxa: Acanthoclava, Acanthosphaera, Acidotocarena, Acutitheca, Aksuglobulus, Alaconcha, Amoebinella, Ampelitocystis, Amphoridium, Ancienta, Andobolus, Anzalia, Archaeooides, Archaeopetasus, Archaeotremaria, Archaeozoon, Aristophycus, Arthroon, Artimyctella, Ascosyrinx, Aspidella, Astropolithon, Aurisella, Babetosphaera, Bactryllium, Beltania, Beltina, Bensonia, Biconulites, Bioistodina, Blastophycus, Bolonia, Bosworthia, Botomaella, Bovicornellum, Boyarinovicyathidae, Caelestites, Calciphyton, Calcisphaera, Cambrocassis, Cambroclavida, Cambrogeorgina, Cambrotrypa, Caudomorpha, Caveacus, Cestites, Chalasiocranos, Charaussaia, Chondropogon, Clausisphaera, Clavitella, Cochleatina, Coleolidae, Coleoloida, Coleoloides, Cristatodus, Cupithecidae, Cyclogeorgina, Cycloites, Cyrtochites, Deccanosporium, Dentachites, Dictyophycus, Dimorphoconus, Dinocardia, Dolichomocelypha, Draffania, Dvinia, Dystachophycus, Ebriella, Ebrinula, Ediacaria, Emeithella, Emmonsaspis, Enchostoma, Entosphaeroides, Eocucumaria, Eoescharopora, Eoglobella, Eophyton, Eosphaera, Etacystis, Eumuensteria, Eurysolenpora, Fensiangia, Fermoria, Flabetheca, Foerstia, Foliaceria, Fomitchella, Forchhammera, Fusuconcharium, Gigartinites, Globuloella, Gochtia, Gorlovella, Granifer, Greysonia, Gunflintia, Gymnosolen, Hadrophycus, Haliserides, Harttites, Heliophycus, Henaniodus, Hensonella, Heosomocelypha, Heterosculpotheca, Hexagonaria, Himanthalites, Huangshandongella, Huishea, Huizenodus, Humboldtochaeta, Huroniospora, Hydrocytium, Hyphantaenia, Indocera, Isnella, Issinella, Itieria, Jiangshanodus, Kakabekia, Kazakhstanotubulus, Kelyphosphaera, Kiehnensus, Kinsabia, Koksodus, Korilacus, Krishnania, Labyrinthotuba, Ladinella, Lascoa, Lenaella, Leptophycus, Lianophycus, Libodiscus, Licrophycus, Lithostachys, Lochmophycus, Lonchosaccus, Lukatiella, Mabiania, Mamillodus, Manchuriophycus, Maritimella, Martjanowskia, Mawsonella, Medusinites, Megasphaera, Meghystrichosphaeridium, Melopetasus, Microancientia, Microphycus, Micropylepora, Minjaria, Miratheca, Mitscherlichia, Mobergellidae, Mongoliacus, Mongolitesta, Muensteria, Myxomycites, Nemaphycus, Nematophycus, Nereograpsus, Netrelytron, Newlandia, Nicolarites, Nimbia, Ningqiangsclerites, Niphadus, Palaeobotryllus, Palaeobromelia, Palaeorhopalon, Palaeorivularia, Palhistiodinia, Papillomembrana, Parammodochium, Pararchaeomonas, Parmia, Parmites, Paropsonemidae, Parvulonoda, Perichoderma, Phyllochiton, Pilievicutis, Pitella, Platydendron, Plexoramea, Plicatolingula, Plinthokonion, Poludia, Polycuppes, Polygonosphaerites, Polysiphonides, Polysiphonidia, Poratites, Porocystis, Portalia, Portelia, Praearenaria, Pragmotheca, Proarchaeocyathus, Problematikum, Protobolus, Protopterygotheca, Psamathopalass, Pseudokussiella, Pteromidae, Pterpmus, Ptiloncodus, Punctatus, Pyrgites, Pyxolithus, Quadratapora, Quadrorites, Radiaxialia, Radiocyatha, Radiomura, Radix, Redkinia, Redoubtia, Resegia, Reticulum, Rhagnura, Rotadiscidae, Rugatotheca, Sagittitheca, Salanacus, Scambocris, Schodackia, Scissotheca, Scolithus, Selenoplax, Seletinicus, Shamovella, Shinteinella, Sinosabellidites, Siphonema, Solenotia, Sphenopteron, Spinoceras, Spiralella, Spirangium, Spongillopsis, Sporocystis, Spriggia, Stefania, Stictoconus, Stoibostrombidae, Sutivania, Taitia, Taonurus, Tayshira, Tchangsichiton, Theobaldia, Tintinnoidella, Tommotitubulus, Trachyrytidodiacrodium, Trachyzonodiacrodium, Tridia, Tubigeorgina, Tubulella, Tumulduria, Tungussia, Tunudiscus, Turuchania, Tuvinia, Vermiculites, Wushicites, Yangtzesclerites, Yuliunia, Yunnanodus, Zoogleites
Subtaxa: Chancelloriida
Ecology: epifaunal grazer
Distribution:
• Cambrian of Antarctica (1 collection), Argentina (1), Australia (85), Canada (34: British Columbia, Labrador, Newfoundland and Labrador, Nova Scotia, Quebec), China (53), France (1), Germany (1), Greenland (20), Guinea (1), Iran (1), Israel (1), Italy (9), Jordan (2), Kazakhstan (12), Kyrgyzstan (2), Mexico (10), Mongolia (2), Morocco (3), the Russian Federation (36), Spain (5), Türkiye (1), the United Kingdom (7), United States (29: California, Indiana, Massachusetts, Nevada, New York, Pennsylvania, Utah, Virginia)
• Solvan of Argentina (1), Kazakhstan (1), the Russian Federation (5)
• Amgan of Norway (1), the Russian Federation (3)
• Placentian of Canada (1: Nova Scotia), United States (3: Massachusetts)
• Caerfai of Canada (1: Northwest Territories)
Total: 333 collections including 632 occurrences