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Drastic changes in carboniferous ammonoid rates of evolution

Authors: Jürgen Kullmann;

Drastic changes in carboniferous ammonoid rates of evolution

Abstract

Evolutionary rates permit four phases of ammonoid diversity development in ammonoids to be recognized during the Carboniferous: (A) Tournaisian, (B) Visean (excl. up.V3c), (C) Namurian A and B (incl. up.V3c), (D) Namurian C — Stephanian. All periods except C have a horotelic survivorship distribution, but different absolute rates; A and C are characterized by the predominance of short-lived, partly (C) tachytelic genera (longevity ∼ 4 Myr, B of long-lived (∼ 12 Myr), and D by the prevalence of both intermediate and long-lived genera (∼ 4 Myr). Causal explanations for this evolutionary pattern are discussed.

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selected citations
These citations are derived from selected sources.
This is an alternative to the "Influence" indicator, which also reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Citations provided by BIP!
popularity
This indicator reflects the "current" impact/attention (the "hype") of an article in the research community at large, based on the underlying citation network.
BIP!Popularity provided by BIP!
influence
This indicator reflects the overall/total impact of an article in the research community at large, based on the underlying citation network (diachronically).
BIP!Influence provided by BIP!
impulse
This indicator reflects the initial momentum of an article directly after its publication, based on the underlying citation network.
BIP!Impulse provided by BIP!
4
Average
Average
Average
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