Parent taxon: Problematica according to J. J., Jr. Sepkoski 2002
Sister taxa: Acanthoclava, Acanthosphaera, Acidotocarena, Acutitheca, Aksuglobulus, Alaconcha, Amoebinella, Ampelitocystis, Amphoridium, Ancienta, Ancientiidae, 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 (54), 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)
• Amgan of Norway (1), the Russian Federation (3)
• Solvan of Argentina (1), Kazakhstan (1), the Russian Federation (5)
• Caerfai of Canada (1: Northwest Territories)
• Placentian of Canada (1: Nova Scotia), United States (3: Massachusetts)
Total: 334 collections including 635 occurrences