Verifiability of genus-level classification under quantification and parsimony theories: a case study of follicucullid radiolarians

Yifan Xiao, Noritoshi Suzuki, Weihong He, Michael Benton, Tinglu Yang & Chenyang Cai
The classical taxonomy of fossil invertebrates is based on subjective judgments of morphology, which can cause confusion since there are no codified standards for the classification of genera. Here, we explore the validity of the genus taxonomy of 75 species and morphospecies of the Follicucullidae, a Late Paleozoic family of radiolarians, using a new method, Hayashi’s quantification theory II (HQT-II), a general multivariate statistical method for categorical datasets relevant to discriminant analysis. We identify a...
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