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Palaeoperidinium cretaceum a brackish water peridinean dinoflagellate from the early cretaceous

, : Palaeoperidinium cretaceum a brackish water peridinean dinoflagellate from the early cretaceous. Palaeontology (Oxford) 32(4): 907-920

New SEM observations of topotype material of Palaeoperidinium cretaceum from the early Cretaceous of Alberta, Canada have allowed a complete description of this poorly known morphotype, including tabulation and plate overlap patterns. The features displayed by P. cretaceum show that, unlike other members of the genus, this morphotype cannot be interpreted as an extrathecal 'exophragm'. The life-cycle stage presented by P. cretaceum is discussed in relation to the life-cycle of modern dinoflagellates. It is suggested that P. cretaceum may represent a hitherto unknown fossilizable zygotic stage in the dinoflagellate life-cycle.


Other references

Mingazzini, P., 1894: Sulla degenerazione sperimentale dell ova di Rana esculenta. Rendiconti Accad Lincei, ccxci 459-467

Scudder, S.H., 1892: The services of Edward Burgess to Natural Science. P Soc: 358-364

Pearsall, E.A.; Sheth, U.; Fenech, D.S.; McKenzie, M.E.; Victor, J.Charles.; McLeod, R.S., 2011: Patients admitted with acute abdominal conditions are at high risk for venous thromboembolism but often fail to receive adequate prophylaxis. The aim was to determine the frequency with which thromboprophylaxis is prescribed, factors predicting its prescription, and the frequency of symptomatic venous thromboembolism in patients admitted with acute abdominal conditions. Charts of patien...

Suare, P.Regrin, E.; Rodrigue, L.Pez, N.Yra, C., 1958: Dr. Carlos Rodríguez López-Neyra; 1885-1958. Preceding. "laboratorio;" Analisis Clinicos, Bacteriologia, Inmunologia, Parasitologia, Hematologia, Anatomia Patologica, Quimica Clinica 26(154): 301-301

Hamly, D.H., 1941: A Precision Fine Adustment For Standard Microscopes. Of especial advantage for taking of series of photomicrographs with constant differences of focus[long dash]especially helpful for the correct interpretation of 3-dimensional structure, particularly of biological materials.

Politzer, G., 1955: Theorie der Doppelmissbildungen. Zeitschrift fuer Mikroskopisch-Anatomische Forschung, 61: 590-623

Stilinovic, B.; Hrenovic, J., 2004: Rapid detection of sulfide-producing bacteria from sulfate and thiosulfate. An original liquid medium and a field broth bottle method for the rapid detection of the most probable number of sulfide-producing bacteria (SPB) from sulfate and thiosulfate are described. The broth bottle method enables after inoculation with a...

Niederberger, P.; Miozzari, G.; Hütter, R., 1981: Biological role of the general control of amino acid biosynthesis in Saccharomyces cerevisiae. The biological role of the "general control of amino acid biosynthesis" has been investigated by analyzing growth and enzyme levels in wild-type, bradytrophic, and nonderepressing mutant strains of Saccharomyces cerevisiae. Amino acid li...

Quiquampoix, H.; Loughman, B.C.; Ratcliffe, R.G., 1993: A 31P-NMR study of the uptake and compartmentation of manganese by maize roots. The uptake and compartmentation of manganese by maize roots, from solutions containing between 1 micromolar and 1 mM Mn2+, was monitored in vivo by 31P nuclear magnetic resonance (NMR) spectroscopy. Qualitatively, NMR provided a convenient method...

Ueno, Takatoshi, 1997: Host age preference and sex allocation in the pupal parasitoid Itoplectis naranyae Hymenoptera Ichneumonidae. To understand the reproductive biology of Itoplectis naranyae Ashmead, a major pupal parasitoid of lepidopteran pests in the paddy field, the acceptability and suitability of hosts of different ages and the resultant allocation of sexes in these h...