Zobrazeno 1 - 4
of 4
pro vyhledávání: '"Michael E. Tuckey"'
Publikováno v:
Paleobiology. 29:305-328
Area cladograms produced by parsimony analysis of endemicity illustrate historically developed biogeographical associations among Caradocian, Ashgillian, Llandoverian, and Wenlockian bryozoans. Areas in North America, Siberia, and Baltica were organi
Autor:
Robert L. Anstey, Michael E. Tuckey
Publikováno v:
Lethaia. 25:111-117
An analysis of the final stratigraphic appearances of byrozoan species and genera, compiled in a world-wide bryozoan data base, revealed three discrete Late Ordovician extinctions. A Late Carddoc (Onnian) extinction was most pronounced on the plates
Autor:
Michael E Tuckey
Publikováno v:
Palaeogeography, Palaeoclimatology, Palaeoecology. 77:91-126
The following biogeographic patterns have been determined from a quantitative analysis of the global distribution of the Ordovician genera: Arenig faunas are of low diversity, with provinces appearing in North America and Baltica. Three provinces app
Autor:
Michael E. Tuckey, Robert L. Anstey
Publikováno v:
PALAIOS. 4:475
Gradient analysis has previously been used by ecologists and paleoecologists to quantify spatial gradients in the distribution of taxa. Temporal gradients can also be quantified by these techniques, which makes them potentially useful in biostratigra