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Introduction : The problem of the Problematica = Introduction : Le problème des ProblematicaBENGTSON, S.Problematica fossil taxa. 1986, pp 3-11Book Chapter

PRECAMBRIAN FOSSILS, PSEUDOFOSSILS, AND PROBLEMATICA IN CANADA.1971; GEOL. SURV. CANADA, BULL.; CAN; 1971, NUM. 0189, P. 1 A 146Miscellaneous

A longstanding palaeobotanical enigma solved : The Mesozoic Red Eggs, Brown Fruits and Cutinized Sacs of T.M. HarrisMANUM, S.B.OFP Informations. 1992, issn 0299-9765, p.103, 16-BConference Paper

Problematic fossil taxons = Taxons fossiles problématiquesHOFFMAN, Antoni; NITECKI, Matthew H.1986, VIII-267 p, isbn 0-19-503992-0Book

Remarques sur l'ultrastructure et les affinités bilogiques des Lithraphidites, Nannofossiles calcaires du Crétacé = Remarks on ultrastructure and biological affinities of Lithraphidites, cretaceous calcareous nannofossilsJANIN, M.-C.Revue de Micropaléontologie. 1998, Vol 41, Num 4, pp 281-296, issn 0035-1598Article

Precambrian carbonaceous megafossils = Les mégafossiles carbonacés antécambriensHOFMANN, H.J.International symposium on fossil algae. 3. 1985, pp 20-33Conference Paper

On some Umbellinids (carbonate microproblematica) from the Frasnian (Late Devonian) of Chah Riseh area (Central Iran)VACHARD, D.Annales de la Société géologique du Nord. 2000, Vol 8, Num 2, pp 75-80, issn 0767-7367Article

DEBRIS CUTICULAIRES D'ANNELIDES ASSOCIES AUX SCOLECODONTESTAUGOURDEAU P.1972; REV. PALAEOBOT. PALYNOL.; NETHERL.; 1972, VOL. 13, NUM. 0003-0004, P. 233 A 252Serial Issue

L'ENIGME DU DAEDALUS (DAEDALUS ROUAULT, 1850). ICHNOFOSSILIA1971; BULL. MUS. NATION. HIST. NAT.; FR. ; 1971, NUM. 0020, P. 37 A 71Serial Issue

Extant Problematica within or near the MetazoaHASZPRUNAR, G; RIEGER, R.M; SCHUCHERT, P et al.The early evolution of Metazoa and the significance of problematic taxa. 1991, pp 99-105Conference Paper

Considerations on systematic placement of the Styliolines (Incertae Sedis : Devonian) = Sur la position systématique des styliolines (Incertae Sedis : Dévonien)YOCHELSON, E.L; LINDEMANN, R.H.Problematica fossil taxa. 1986, pp 45-58Book Chapter

Problematica of the Early Cambrian = Problematica du Cambrien inférieurROZANOV, A.YU.Problematica fossil taxa. 1986, pp 87-96Book Chapter

L'énigme des Microcodium = The Microcodium enigmaBIGNOT, G.Bulletin trimestriel de la Société géologique de Normandie et des amis du Muséum du Havre. 1994, Vol 81, Num 2, pp 25-45, issn 0336-9994Article

Problematica/Incertae sedisYOCHELSON, E.L.The early evolution of Metazoa and the significance of problematic taxa. 1991, pp 287-296Conference Paper

QUELQUES REMARQUES SUR LES ORGANISMES INCERTAE SEDIS DE LA FAMILLE DES CALCISPHAERULIDAE BONET.DUFOUR T.1968; C.R. ACAD SCI., D; FRA; 1968(5), VOL. 266, NUM. 0019, P. 1947 A 1949Miscellaneous

Radiocyathids = Les radiocyathidésZHURAVLEV, A.YU.Problematica fossil taxa. 1986, pp 35-44Book Chapter

WALTER HAENTZSCHEL (16.11.1904-10.5.HERTWECK G.1972; PALAEONTOL. Z.; DTSCH. ; 1972, VOL. 46, NUM. 0003-0004, P. 105 A 112Serial Issue

ON THE MICROFOSSILS OF CORYCIUM ENIGMATICUM.MATISTO A.1969; BULL. GEOL. SOC. FINL.; FIN; 1969, NUM. 0041, P. 199 A 202Miscellaneous

Probable life-forms from the Precambrian of the Witwatersrand system (South Africa) = Formes probables de vie dans le Précambrien du système Witwatersrand (Afrique du Sud)SCHIDLOWSKI, M.Nature (London). 1965, Vol 205, Num 4974, pp 895-896, issn 0028-0836, 2 p.Article

The 'ostracode' genus Discoidella Croneis & Gale 1939, is not a bivalveSOHN, I.G.International symposium on ostracoda. 11. 1993, pp 65-76Conference Paper

XENOTHEKA KLINOSTOMA UND IHRE SYSTEMATISCHE STELLUNG (X. K. ET SA POSITION SYSTEMATIQUE).EISENACK A.1970; NEU. JB. GEOL. PALAEONTOL., MONATSH.; DEU; 1970(8), NUM. 0008, P. 449 A 451Miscellaneous

The Cambrian netlike fossil Microdictyon = Le fossile réticulé cambrien MicrodyctionBENGTSON, S; MATTHEWS, S.C; MISSARZHEVSKY, V.V et al.Problematica fossil taxa. 1986, pp 97-115Book Chapter

PROBLEMATICAL FOSSILS FROM THE PERMIAN LIMESTONE OF AKASAKA,GIFU PREFECTURE.OZAKI K.1968; SCI. REP., YOKOHAMA UNIV., JAP; JPN; 1968, NUM. 0014, P. 27 A 33Miscellaneous

NOTES ON THE MORPHILOGY AND TAXONOMIC POSITION OF AYSHEAIA (ONYCOPHORA.) AND OF SKANIA (UNDETERMINED PHYLUM).DELLE CAVE L; SIMONETTA AM.1975; MONIT. ZOOL. ITAL.; ITAL.; 1975, VOL. 9, NUM. 0002, P. 67 A 81Serial Issue

ZOOPHYCOS: ICHNOFOSSILE DE LA FORMATION ARITA A YUASA CHO PREFECTURE DE WAKAYAMA, JAPONKANSHA Y.1974; J. GEOL. SOC. JAP.; JAP.; 1974, VOL. 80, NUM. 0008, P. 381 A 382Serial Issue

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