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Some morphological variations in Siphonodendron and Diphyphyllum as a response to ecological stimuli

100%

Poty E.

Acta Palaeontologica Polonica

1980

tom 25

nr 3-4

In some species of the fasciculate rugosan, Siphonodendron, the morphology of the fossula, columella and connecting processes is controlled by ecological conditions. A colony in a turbulent environment would have numerous connecting processes, a strong columella and a well-marked fossula, with a preferential orientation of the corallites if the water movement was in the form of a persistent current. In a quiet environment, the connecting processes are generally absent, the cardinal fossula is indistinct and the columella is weak or absent. In some species of Diphyphyllum, the morphology of the fossula and the disposition of the corallites are also controlled by ecological conditions.

The stratigraphy and paleobiogeography of Belgian Visean corals

100%

Poty E.

Acta Palaeontologica Polonica

1980

tom 25

nr 3-4

Rugose coral assemplages may be used to characterize Belgian Viséan strata but there are some differences between contemporary coral assemblages from the Namur-Dinant basin and from the Visé area (Campine-Brabant basin). The Namur- Dinant basin was a relatively closed environment usually separated from the Visé area by some kind of barrier. Corals could have migrated into it from Ireland or are endemic. In contrast, the Visé area was an open environment with corals showing affinities with those of the British Central Province, the USSR and Africa.

Ograniczanie wyników

2 Acta Palaeontologica Polonica

2 Poty E.

2 1980

Wyniki wyszukiwania

Some morphological variations in Siphonodendron and Diphyphyllum as a response to ecological stimuli

The stratigraphy and paleobiogeography of Belgian Visean corals