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† Problematica

Problematica

Additional Functions

Grouping

Belong­ing to

Gaeabionta  ⇒ Domäne: Eukaryota  ⇒ Reich: Animalia  ⇒ Mittelreich: Metazoa

Taxo­nomic seg­ment

Abteilung

This mentioned taxonomy is an attempt to make an conclusive assignment from the different classifications of various scientists. Because the taxonomy may change due to the latest investigative methods and other findings, our map is a guide only.

Name from

Corre­spond­ing author (Name, Year)

Sepkoski, 2002

Other languages

scientific

Problematica

Lebenszeitraum in Million Jahren (Ma)

Start age: 358.9 Ma - End age: 38 Ma
37.71
56
66
86.3
100.5
125.77
145
161.5
170.9
189.6
208.5
242
251.902
264.28
283.5
298.9
315.2
358.9
Bartonian
Lutetian
Ypresian
Thanetian
Selandian
Danian
Maastrichtian
Campanian
Santonian
Coniacian
Turonian
Cenomanian
Albian
Aptian
Barremian
Hauterivian
Valanginian
Berriasian
Tithonian
Kimmeridgian
Oxfordian
Callovian
Bathonian
Bajocian
Aalenian
Toarcian
Pliensbachian
Sinemurian
Hettangian
Rhaetian
Norian
Carnian
Ladinian
Anisian
Olenekian
Induan
Changhsingian
Wuchiapingian
Capitanian
Wordian
Roadian
Kungurian
Artinskian
Sakmarian
Asselian
Gzhelian
Kasimovian
Moscovian
Bashkirian
Serpukhovian
Visean
Tournaisian
Eocene
Paleocene
Upper/Late Cretaceous
Lower/Early Cretaceous
Upper/Late Jurassic
Middle Jurassic
Lower/Early Jurassic
Upper/Late Triassic
Middle Triassic
Lower/Early Triassic
Lopingian
Guadalupian
Cisuralian
Pennsylvanian
Mississippian
Paleogene
Cretaceous
Jurassic
Triassic
Permian
Carboniferous
Start age: 541 Ma - End age: 358.9 Ma
358.9
387.7
410.8
425.6
433.4
443.8
458.4
477.7
494
504.5
521
635
Famennian
Frasnian
Givetian
Eifelian
Emsian
Pragian
Lochkovian
Ludfordian
Gorstian
Homerian
Sheinwoodian
Telychian
Aeronian
Rhuddanian
Hirnantian
Katian
Sandbian
Darriwilian
Dapingian
Floian
Tremadocian
Stage 10
Jiangshanian
Paibian
Guzhangian
Drumian
Wuliuan
Stage 4
Stage 3
Stage 2
Fortunian
Ediacaran
Upper Devonian
Middle Devonian
Lower Devonian
Pridoli
Ludlow
Wenlock
Llandovery
Upper Ordovician
Middle Ordovician
Lower Ordovician
Furongian
Miaolingian
Series 2
Terreneuvian
Neoproterozoic
Devonian
Silurian
Ordovician
Cambrian
Proterozoic

Reference- and Source indication, Literature

Automatic Links to external internet sources (Responsibility is with the operator)

Search for taxonomy at PaleobioDB.org
Search for taxonomy at Fossilworks
Search for taxonomy at The Taxonomicon

Next lower taxonomy level

On the same taxonomic level (siblings) (Count: 4)

Taxonomic assignment (819)

Occurrences (2)

References by PBDB, License: CC BY

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  • C. B. Skovsted, 2007 - Small shelly fossils from the argillaceous facies of the Lower Cambrian Forteau Formation of western Newfoundland - Acta Palaeontologica Polonica (52), 729-748 (journal article, English)
  • R. K. Bambach, 2007 - Supplement to Autecology and the filling of ecospace: Key metazoan radiations - Palaeontology (50), 1-22 (journal article, English)
  • M. A. Fedonkin, 2007 - The rise of animals: Evolution and diversification of the Kingdom Animalia - The Johns Hopkins University Press, Baltimore, MD (), 1-326 (compendium, English)
  • M. Streng, 2006 - A new mobergellan (small shell fossils) from the early Middle Cambrian of Morocco and its significance - Paläontologische Zeitschrift (80), 209-220 (journal article, English)
  • W. Kiessling, 2006 - Compendium of calcimicrobes - (), - (unpublished, English)
  • R. E. Plotnick, 2006 - Names of marine ichnofossil genera - (), - (unpublished, English)
  • C. B. Skovsted, 2006 - Small shelly fauna from the upper Lower Cambrian Bastion and Ella Island Formations, North-East Greenland - Journal of Paleontology (80), 1087-1112 (journal article, English)
  • J. Yao, 2005 - Basal Cambrian microfossils from the Yurtus and Xishanblaq Formations (Tarim, North-West China): Systematic revision and biostratigraphic correlaton of Micrhystridium-like acritarchs - Palaeontology (48), 687-708 (journal article, English)
  • R. Wrona, 2004 - Cambrian microfossils from glacial erratics of King George Island, Antarctica - Acta Palaeontologica Polonica (49), 13-56 (journal article, English)
  • W. Kiessling, 2004 - Ecology opinions - (), - (unpublished, )
  • E. Mayoral, 2004 - Stranded jellyfish in the lowermost Cambrian (Corduban) of Spain - Revista española de paleontología (19), 191-198 (journal article, English)
  • J. M. Malinky, 2004 - Hyoliths and small shelly fossils from the Lower Cambrian of NorthEast Greenland - Acta Palaeontologica Polonica (49), 551-578 (journal article, English)
  • C. B. Skovsted, 2004 - The problematic fossil Triplicatella from the Early Cambrian of Greenland, Canada and Siberia - Canadian Journal of Earth Sciences (41), 1273-1283 (journal article, English)
  • C. Skovsted, 2003 - Mobergellans (Problematica) from the Cambrian of Greenland, Siberia and Kazakhstan - Paläontologische Zeitschrift (77), 429-443 (journal article, English)
  • J. J. Sepkoski, Jr., 2002 - A compendium of fossil marine animal genera - Bulletins of American Paleontology (363), 1-560 (serial monograph, English)
  • J. B. Riding, 2002 - Aptian to Coniacian (Early–Late Cretaceous) palynostratigraphy of the Gustav Group, James Ross Basin, Antarctica - Cretaceous Research (), 739-760 (journal article, English)
  • A. Williams, 2002 - Part H Brachiopoda (revised): Volume 4, Rhynchonelliformea (part) - Treatise on Invertebrate Paleontology (), 921-1688 (serial monograph, English)
  • J. J. Alvaro, 2002 - Small shelly fossils from the Lower Cambrian Lastours Formation, southern Montagne Noir, France - Geobios (35), 397-409 (journal article, English)
  • S. Xiao, 2002 - Macroscopic carbonaceous compressions in a terminal Proterozoic shale: a systematic reassessment of the Miaohe biota, south China - Journal of Paleontology (76), 347-376 (journal article, English)
  • D. I. Gravestock, 2001 - The Cambrian biostratigraphy of the Stansbury Basin, South Australia - Russian Academy of Sciences, Transactions of the Palaeontological Institute (282), 1-344 (serial monograph, English)
  • S. Bengtson, 2001 - The integument of Cambrian chancelloriids - Acta Palaeontologica Polonica (46), 1-22 (journal article, English)
  • S. Schroeder, 2001 - Korallenfauna und Fazies givetischer Kalksteinabfolgen (Cuerten-/Dreimühlen-Formation) der Dollendorfer Mulde (Devon, Rheinisches Schiefergebirge/Eifel) - Senckenbergiana lethaea (81), 111-133 (journal article, English)
  • A. Williams, 2000 - Part H Brachiopoda (revised): Volumes 2 & 3, Linguliformea, Craniiformea, Rhynchonelliformea (part). - Treatise on Invertebrate Paleontology (), 1-919 (serial monograph, English)
  • Yu. E. Demidenko, 2000 - New Chancelloriid sclerites from the Lower Cambrian of South Australia - Paleontological Journal (34), 377-383 (journal article, )
  • J. W. Hagadorn, 2000 - Ediacaran Fossils from the Southwestern Great Basin, United States - Journal of Paleontology (74), 349-359 (journal article, )
  • J. G. Gehling, 2000 - The first named Ediacaran body fossil, Aspidella terranovica - Palaeontology (43), 427-456 (journal article, English)
  • J. K. Bartley, 1998 - A Vendian–Cambrian boundary succession from the northwestern margin of the Siberian Platform: stratigraphy, palaeontology, chemostratigraphy and correlation - Geological Magazine (135), 473-494 (journal article, English)
  • B. Amard, 1997 - Chuaria pendjariensis n. sp., acritarche du bassin des Volta, Bénin et Burkina-Faso, Afrique de l’ouest: un taxon nouveau du Cambrien inférieur - Comptes Rendus de l'Académie des Sciences. Série 2. Sciences de la Terre et des Planètes (324), 477-483 (journal article, French)
  • S. Conway Morris, 1997 - Lower Cambrian Cambroclaves (Incertae sedis) from Xinjiang, China, with comments on the morphological variability of sclerites - Palaeontology (40), 167-189 (journal article, )
  • S. Conway Morris, 1997 - Mobergellans from the Lower Cambrian of Mongolia, Sweden, and the United States: molluscs or opercula of Incertae Sedis? - Journal of Paleontology (71), 968-985 (journal article, )
  • R. Trompette, 1996 - Temporal relationship between cratonization and glaciation: The Vendian-early Cambrian glaciation in Western Gondwana - Palaeogeography, Palaeoclimatology, Palaeoecology (123), 373-383 (journal article, English)
  • E. Landing, 1996 - Oldest shelly fossils from the Taconic Allochthon and late Early Cambrian sea-levels in eastern Laurentia - Journal of Paleontology (70), 741-761 (journal article, )
  • A. M. Duane, 1996 - Palynology of the Byers Group (Late Jurassic-Early Cretaceous) of Livingston and Snow islands, Antarctic Peninsula: its biostratigraphical and palaeoenvironmental significance - Review of Palaeobotany and Palynology (91), 241-281 (journal article, English)
  • J. K. Rigby, 1995 - Lower Cambrian demosponges and hexactinellid sponges from Yunnan, China - Journal of Paleontology (69), 1009-1019 (journal article, English)
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  • B. Wang, 1994 - New mollusks and problematic fossils from the Lower Cambrian of China - Paleontological Journal (28), 10-17 (journal article, )
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  • S. Bengtson, 1992 - Proterozoic and earliest Cambrian skeletal metazoans - The Proterozoic Biosphere: A Multidisciplinary Study (), 1017-1034 (book/book chapter, English)
  • S. He, 1992 - The small shelly fossils from the Palaeocambrian Meishucunian stage in western Zhejiang - Geology of Zhejiang (8), 1-7 (journal article, Chinese)
  • S. Conway Morris, 1992 - Carinachitiids, Hexangulaconnulariids and punctatus: problematic metazoans from the Early Cambrian of South China - Journal of Paleontology (66), 384-406 (journal article, )
  • J. M. Keating, 1992 - Palynology of the Lachman Crags Member, Santa Marta Formation (Upper Cretaceous) of north-west James Ross Island - Antartic Science (4), 293-304 (journal article, English)
  • E. Landing, 1991 - Uppermost Precambrian(?)-Lower Cambrian of mainland Nova Scotia: faunas, depositional environments, and stratigraphic revision - Journal of Paleontology (65), 382-396 (journal article, English)
  • S. Bengtson, 1990 - Early Cambrian fossils from South Australia - Association of Australasian Palaeontologists (9), 1-364 (serial monograph, English)
  • E. Landing, 1989 - The Placentian Series: Appearance of the oldest skeletalized faunas in southeastern Newfoundland - Journal of Paleontology (63), 739-769 (journal article, English)
  • T. G. He, 1989 - Some problematic small shelly fossils from the Meishucunian of the Lower Cambrian in the western Yangtze region - Acta Micropalaeontologica Sinica (6), 111-127 (journal article, Chinese)
  • Z. Yue, 1989 - A restudy of some Early Cambrian small shelly fossils from Ganluo and Emei, Sichuan, southwest China - Acta Micropalaeontologica Sinica (6), 389-407 (journal article, Chinese)
  • V. V. Missarzhevsky, 1989 - Oldest skeletal fossils of late Precambrian and early Cambrian age: a review of recent work - Trudy Geologicheskogo Instituta AN SSSR (443), 1-231 (serial monograph, Russian)
  • S. Conway Morris, 1988 - More soft-bodied animals and algae from the Middle Cambrian of Utah and British Columbia - University of Kansas Paleontological Contributions (122), 1-48 (journal article, English)
  • I. Hinz, 1987 - The Lower Cambrian microfauna of Comley and Rushton, Shropshire, England - Palaeontographica Abteilung A (198), 41-100 (serial monograph, English)
  • A. H. Knoll, 1987 - Micropaleontology across the Precambrian-Cambrian boundary in Spitsbergen - Journal of Paleontology (61), 898-926 (journal article, English)
  • P. W. Signor, 1987 - A pre-trilobite shelly fauna from the White-Inyou region of eastern California and western Nevada - Journal of Paleontology (61), 425-438 (journal article, )
  • N. I. Vasil’eva, 1986 - Novyj rod anabaritid iz nizhnego kembriya Sibirskoj platformy. [A new genus of anabaritids from the Lower Cambrian of the Siberian Platform] - Paleontological Journal (1986), 103-104 (journal article, English)
  • N. I. Vassiljeva, 1985 - K sistematike otryada Chancelloriida Walcott, 1920 (On the systematics of the Chancelloriida Walcott,1920) - Problematiki pozdnego dokembriya i paleozoya (Late Precambrian and Palaeozoic Problematics). Trudy Institut geologii i geofiziki, Sibirskoe otdelenie, Akademiya nauk SSR (632), 115-126 (book/book chapter, Russian)
  • H. Mostler, 1985 - Neue heteractinide Spongien (Calcispongea) aus dem Unter- und Mittelkambrium Südwestsardiniens [New heteractinid sponges (Calcispongia) from Lower and Middle Cambrian of SW Sardinia] - Berichte des Naturwissenschaftlich-Medizinischen Vereins Innsbruck (72), 7-32 (journal article, German)
  • M. A. S. McMenamin, 1985 - Basal Cambrian small shelly fossils from the La Ciengega Formation, northwestern Sonora, Mexico - Journal of Paleontology (59), 1414-1425 (journal article, )
  • T. He, 1984 - Some small shelly fossils from the Lower Cambrian Xinji Formation in Fangcheng County, Henan Province - Acta Palaeontologica Sinica (23), 350-357 (journal article, )
  • X. Yang, 1984 - New small shelly fossils from Lower Cambrian Meishucun stage of Nanjiang area, northern Sichuan - Professional Papers of Stratigraphy and Palaeontology (13), 35-48 (journal article, Chinese)
  • Y. Qian, 1984 - Small shelly fossils from the lowest Cambrian in Guizhou - Professional Papers of Stratigraphy and Palaeontology (13), 91-124 (journal article, Chinese)
  • J. Qian, 1984 - An Early Cambrian small shelly fauna from Aksu-Wushi region, Xinjiang - Professional Papers of Stratigraphy and Palaeontology (13), 65-90 (journal article, Chinese)
  • P. Chen, 1984 - Discovery of Lower Cambrian small shelly fossils from Jijiapo, Yichang, west Hubei and its significance - Professional Papers of Stratigraphy and Palaeontology (13), 49-64 (journal article, Chinese)
  • O. V. Sosnovskaya, 1984 - Some problematic fossils from the Precambrian sequence of the Kuznets Alatau - Paleontological Journal (), 123-127 (journal article, )
  • Y. Qian, 1984 - Zhijinitidae and its stratigraphical significance - Acta Palaeontologica Sinica (23), 215-223 (journal article, Chinese)
  • C. Duan, 1984 - Small shelly fossils from the Lower Cambrian Xihaoping Formation the Shennongjia district, Hubei Province - hyoliths and fossil skeletons of unknown affinities - Bulletin of the Tianjin Institute of Geology and Mineral Resources (7), 141-188 (journal article, Chinese)
  • Y. Qian, 1983 - Small shelly fossils from the Xihaoping Member of the Tongying Formation in Fangxian County of Hubei Province and their stratigraphical significance - Acta Palaeontologica Sinica (22), 82-94- (journal article, Chinese)
  • R. J. Azmi, 1983 - Early Cambrian (Tommotian) conodonts and other shelly microfauna from the upper Krol of Mussoorie Syncline, Garhwal Lesser Himalaya with remarks on the Precambrian-Cambrian boundary - Himalayan Geology (11), 360-372 (journal article, English)
  • A. K. Val'kov, 1982 - - Biostratigrafija nizhnego kembrija vostoka Sibirskoj platformy (), 1-92 (book/book chapter, Russian)
  • M. Chen, 1981 - The small shelly fossil assemblage in the limestone of the uppermost part of the Dengying Formation at Songlingpo, Yichang - Journal of the Wuhan College of Geology, Earth Science (1), 32-41 (journal article, Chinese)
  • V. V. Missarzhevsky, 1981 - Stratigrafiya i fauna pogranichnykh sloyev Kembriya i Dokembriya Malogo Karatau [Stratigraphy and fauna of the Precambrian-Cambrian boundary beds of the Malyy Karatau] - Trudy Ordena Trudovogo Krasnogo Znameni Geologicheskiy Institut Akademiya NAUK SSSR (326), 1-90 (serial monograph, Russian)
  • W. Yü, 1979 - Earliest Cambrian monoplacophorans and gastropods from western Hubei with their biostratigraphical significance - Acta Palaeontologica Sinica (18), 233-270 (journal article, Chinese)
  • D. V. Osadchaya, 1979 - Stratigrafiya i arkheotsiaty nizhnego kembriya Altaye-Sayanskoy skladchatoy oblasti [Lower Cambrian stratigraphy and archaeocyatha of the Altay-Sayan fold belt] - Trudy Instituta Geologii i Geofiziki, Sibirskoye Otdeleniye (380), 1-215 (serial monograph, Russian)
  • Y. Qian, 1979 - Hyolithids and other small shelly fossils from the Lower Cambrian Huangshandong Formation in the eastern part of the Yangtze Gorge - Acta Palaeontologica Sinica (18), 207-230 (journal article, Chinese)
  • A. M. Mambetov, 1979 - The Lower Cambrian of the Talassk Ala-Too and its correlation with the sections of Karatau Minor and the Siberian Platform - Rossiiskaya Akademiya Nauk Sibirskoe Otdelenie Trudy Instituta Geologii i Geofiziki (406), 98-138 (journal article, Russian)
  • Y. Qian, 1978 - The early Cambrian hyolithids in central and southwest China and their stratigraphical significance - Memoirs of Nanjing Institute of Geology and Palaeontology (11), 1-43 (journal article, Chinese)
  • J. K. Rigby, 1978 - Porifera of the Middle Cambrian Wheeler Shale, from the Wheeler Amphitheater, House Range, in western Utah - Journal of Paleontology (52), 1325-1345 (journal article, English)
  • Y. Qian, 1977 - Hyolitha and some problematica from the Lower Cambrian Meishucun Stage in Central and SW China - Acta Palaeontologica Sinica (16), 255-278 (journal article, Chinese)
  • B. Senowbari-Daryan, 1977 - Neue Kalkschwämme und ein Problematikum (Radiomura cautica n.g.,n.s.) aus Oberrhät-Riffen südlich von Salzburg (Nördliche Kalkalpen) - Mitteilungen der österreichischen geologischen Gesellschaft (), 17-42 (journal article, German)
  • H. Mostler, 1976 - Neue Poriferen aus oberkambrischen Gesteinen der Mila-Formation im Elburzgebirge (Iran) [New Porifera from the Upper Cambrian Mila Formation in the Elburz Mountains (Iran)] - Geologisch-Paläontologische Mitteilungen Innsbruck (5), 1-36 (journal article, German)
  • W. Hantzschel, 1975 - Miscellanea. Supplement 1. Trace Fossils and Problematica - Treatise on Invertebrate Paleontology (), W1-W269 (compendium, English)
  • A. M. Blazer, 1975 - Index of Generic Names of Fossil Plants, 1966-1973 - Geological Survey Bulletin (), 1-54 (serial monograph, English)
  • V. V. Missarzhevsky, 1974 - Novye dannye o drevnejshikh okamenelostyakh rannego kembriya Sibirskoj platformy - Biostratigraphiya i paleontologiya nizhnego kembriya Europy i severnoj Azii (), 179-189 (book/book chapter, English)
  • O. G. Okuneva, 1973 - Biostratigrafiya i fauna kembriya Primorya [Cambrian biostratigraphy and fauna of Primorye] - Trudy Instituta Geologii i Geofiziki, Sibirskoye Otdelenye (37), 5-284 (serial monograph, Russian)
  • A. K. Val'kov, 1970 - Angustiokreidy kembriya Sibiri [Cambrian angustiochreids of Siberia] - Stratigrafiya i paleontologiya proterozoya i kembriya vostoka Sibirskoj platformy (), 94-100 (book/book chapter, Russian)
  • H. N. Andrews, 1970 - Index of Generic Names of Fossil Plants, 1820-1965 - Geological Survey Bulletin (), 1-354 (serial monograph, English)
  • K. Sdzuy, 1969 - Unter- und mittelkambrische Porifera (Chancelloriida und Hexactinellida) - Palaeontologische Zeitschrift (43), 115-147 (journal article, German)
  • A. Y. Rozanov, 1969 - Tommotskiu jarus i problema nizhney granisty kembriya - Trudy Geoligske Institut Leningrad (206), 1-379 (serial monograph, Russian)
  • L. G. Voronova, 1969 - Nakhodki vodoroslej i trubok chervej v pogranichnykh sloyakh kembriya i dokembriya na severe Sibirskoj platformy [Finds of algae and worm tubes in the Precambrian–Cambrian boundary beds of the northern part of the Siberian Platform] - Doklady AN SSSR (184), 207-210 (serial monograph, Russian)
  • M. F. Glaessner, 1966 - The late Precambrian fossils from Ediacara, South Australia - Palaeontology (9), 599-628 (journal article, English)
  • A.Y. Rozanov, 1966 - Biostratigraphy and fauna of Lower Cambrian beds - Trudy Geoligske Institut Moscow (148), 1-126 (, )
  • E. S. Richardson, 1966 - Wormlike fossils from the Pennsylvanian of Illinois - Science (151), 75-76 (journal article, English)
  • D. W. Fisher, 1962 - Part W, Miscellanea: Small conoidal shells of uncertain affinities - Treatise on Invertebrate Paleontology (W), 98-143 (book/book chapter, English)
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IDs

GUSID (Global unique identifier short form) z8TYsx0vRkG5JZtpt4Mo5w
GUID (Global unique identifier) B3D8C4CF-2F1D-4146-B925-9B69B78328E7
Database ID 6789