A Cambrian Peak in Morphological Variation Within Trilobite Species
نویسندگان
چکیده
منابع مشابه
A Cambrian peak in morphological variation within trilobite species.
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 greate...
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ژورنال
عنوان ژورنال: Science
سال: 2007
ISSN: 0036-8075,1095-9203
DOI: 10.1126/science.1142964