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Article

A Cambrian peak in morphological variation within trilobite species.

Science (New York, N.Y.) - 27 Jul 2007

Webster Mark

Abstract excerpt

Morphological variation within species is a raw material subject to natural selection. However, temporal change in morphological diversity has usually been studied in terms of variation among rather than within species. The distribution of polymorphic traits in cladistic character-taxon matrices reveals that the frequency and extent of morphological variation in 982 trilobite species are greatest early in the...

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PMID: 17656721
DOI: 10.1126/science.1142964

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PubMed metadata and Literature Corpus relationships. Corpus snapshot updated 6 Sept 2026. Manifest publication-graph-cohort-2026-09-06.1.

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