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| Kakabadze, M.V.; Hoedemaeker, P.J.. |
| The stratigraphic ranges and systematics of heteromorphic ammonites from Lower Cretaceous (Hauterivian-Barremian) deposits in Lower Saxony, northern Germany, are revised. Nine genera and fortyseven species of the family Ancyloceratidae Gill, 1871, are described. One genus (Fissicostaticeras) and 20 species are new; Emericiceras ressense, E. sornayiforme, E. serpentinum, E. subtilicostatum, E. gotti, E. hannoverense, E. kemperi, Crioceratites hastensis, C. subisocostatus, C. vermiformis, Fissicostaticeras claviferum, F. aequicostatoides, F. rarocinctoides, Paracrioceras kleini, Acrioceras (Acrioceras) sarstedtense, A. (A.) crassicostatum, A. (A.) aegidii, A. (A.) longum, A. (A.) astrictum and Uhligia aegidii. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Heteromorphic ammonites; Systematics; Hauterivian; Barremian; Stratigraphy; Northern Germany; New taxa; 38.22. |
| Ano: 2010 |
URL: http://www.repository.naturalis.nl/record/329769 |
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| Bogdanova, T.N.; Prozorovsky, V.A.. |
| This paper focuses on the Barremian/Aptian boundary in the Trans-Caspian area. Results of a stratigraphical study of the uppermost Barremian and the lower Aptian succession in the Trans-Caspian area are presented. The bed-by-bed description of three sections — Keldzhe, Tekedzhik and Utuludzha — is given as well as detailed lithologic columns. Five ammonite zones are known in the studied stratigraphic interval — the Turkmeniceras turkmenicum, Deshayesites tuarkyricus, D. weissi, D. deshayesi, and Dufrenoya furcata zones. These zones are correlated with those of Europe. The Barremian/ Aptian boundary in the Trans-Caspian area should be drawn at the base of the D. tuarkyricus Zone. It corresponds to the layers with the first occurrences of Deshayesites,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Trans-Caspian area; Barremian; Aptian; Ammonite zones; Correlation; Boundary stratotype; 38.22; 42.73. |
| Ano: 1999 |
URL: http://www.repository.naturalis.nl/record/216196 |
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| Bogdanova, T.N.; Hoedemaeker, P.J.. |
| Forty seven species (among them fourteen new that are listed below) of the following ammonite genera of the families Deshayesitidae Stoyanow, Oppeliidae Douvillé, Desmoceratidae Zittel, and Silesitidae Hyatt are described. Neodeshayesites includes the new species N. buergli, N. striatus, N. biplicatus, N. longicostatus, N. multicostatus, N. euglyphoides and N. tuberculatus. Dufrenoyia includes the new species D. renzi. Pseudohaploceras includes the new species P. gerhardti, P. yucaense, P.? yeseraense and P. simile. Melchiorites includes the new species M. colombianus. Zuercherella includes the new species Z. etayosernai. Other species belong to the genera Juandurhamiceras, Aconeceras, Pseudosaynella, Valdedorsella, Puzosia, Carloscaceresiceras,... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Ammonites; Barremian; Aptian; Albian; Colombia; 38.22; 42.73. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/214459 |
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| Kakabadze, M.V.; Hoedemaeker, P.J.. |
| Thirty seven species and subspecies of ammonites of the families Ancyloceratidae Gill, 1871, and Heteroceratidae Spath, 1922, are described. The following new taxa are described; Crioceratites (Paracrioceras) leyvaensis, C. (P.) royogomezi, C. (P.) cabreraensis, Pedioceras multicostatum, Pseudocrioceras guanense, Kutatissites creutzbergi, K. densecostatus compactus, K. etayosernai, K. grandis, K.? galanensis, Ammonitoceras galanense, A. giganteum, Hamiticeras ventrotuberculatum, H. longum, Hemihoplites (Matheronites) ridzewskyi sachicaensis, Colchidites riosuarezi, C. pseudovulanensis, C. guanensis and C. striatosulcatus. Moreover, one new genus, Laqueoceras gen. nov., with the type species L. laqueus sp. nov., is proposed. |
| Tipo: Article / Letter to the editor |
Palavras-chave: Heteromorphic ammonites; Barremian; Aptian; Colombia; 38.22; 42.73. |
| Ano: 2004 |
URL: http://www.repository.naturalis.nl/record/214458 |
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