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14 M. G. BASSETT, L. E. POPOV & L. E. HOLMER resulting in the significant increases in bio- diversity that characterize the ...
Fig. 2. Succession and environmental distribution of distinctive Cambrian-early Ordovician rhynchonclliformean brachiopod assemb ...
16 M. G. BASSETT. L. E. POPOV & L. E. HOLMER animals to form distinctive communities with essentially the same trophic and e ...
CAMBRIAN-TREMADOC BRACHIOPOD DIVERSIFICATION 17 Fig. 3. Examples of late Cambrian-early Ordovician brachiopods that occur typica ...
18 M. G. BASSETT, L. E. POPOV & L. E. HOLMER dominated by the polytoechioideans Protam- bonites (Fig. 3e-f) or Tritoechia (e ...
CAMBRIAN-TREMADOC BRACHIOPOD DIVERSIFICATION 19 early Arenig) benthic assemblages retained major characters of the Cambrian Evol ...
20 M. G. BASSETT. L. E. POPOV & L. E. HOLMER became evident (Sturt & Roberts 1991). Evi- dence of increased early Ordovi ...
CAMBRIAN-TREMADOC BRACHIOPOD DIVERSIFICATION 21 Evolutionary Fauna. These faunas included new stocks of rhynchonelliformean brac ...
22 M. G. BASSETT, L. E. POPOV & L. E. HOLMER DROSER, M. L. & SHEEHAN, P. M. 1997. Palaeoecology of the Ordovician radiat ...
CAMBRIAN-TREMADOC BRACHIOPOD DIVERSIFICATION 23 ROZMAN, Kh. S. 1977. Biostratigrafiya i zoogeo-grafiya verkhnego ordovika Severn ...
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Early Ordovician rhynchonelliformean brachiopod biodiversity: comparing some platforms, margins and intra-oceanic sites around t ...
26 DAVID A. T. HARPER & CONALL MAC NIOCAILL (equivalent to a level within the middle Arenig and close to the base of the Vol ...
EARLY ORDOVICIAN BRACHIOPOD BIODIVERSITY 27 restricted, radiations during the mid- to late Ordovician (Bassett et al. 1999b); ec ...
28 DAVID A. T. HARPER & CONALL MAC NIOCAILL Fig. 2. Palaeogeographical reconstructions for (A) early Arenig and (B) the mid- ...
EARLY ORDOVICIAN BRACHIOPOD BIODIVERSITY 29 Harper et al. (1996) identified nearly 20 early Ordovician intra-oceanic and margina ...
(^30) DAVID A. T. HARPER & CONALL MAC NIOCAILL Fig. 4. Diversity profiles (unstandardized numbers of genera) through (A) the ...
EARLY ORDOVICIAN BRACHIOPOD BIODIVERSITY 31 Fig. 5. Diversity profiles (unstandardized numbers of genera) from Avalonia (based o ...
32 DAVID A. T. HARPER & CONALL MAC NIOCAILL Fig. 6. Comparison of some of the distributional properties of early and late Or ...
EARLY ORDOVICIAN BRACHIOPOD BIODIVERSITY 33 Contributions from the University of Oslo, 295, 37-50. FORTEY, R. A. & COCKS, L. ...
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