Categorical Versus Geometric Morphometric Approaches To
[Palaeontology, 2020, pp. 1–16] CATEGORICAL VERSUS GEOMETRIC MORPHOMETRIC APPROACHES TO CHARACTERIZING THE EVOLUTION OF MORPHOLOGICAL DISPARITY IN OSTEOSTRACI (VERTEBRATA, STEM GNATHOSTOMATA) by HUMBERTO G. FERRON 1,2* , JENNY M. GREENWOOD1, BRADLEY DELINE3,CARLOSMARTINEZ-PEREZ 1,2,HECTOR BOTELLA2, ROBERT S. SANSOM4,MARCELLORUTA5 and PHILIP C. J. DONOGHUE1,* 1School of Earth Sciences, University of Bristol, Life Sciences Building, Tyndall Avenue, Bristol, BS8 1TQ, UK; humberto.ferron@bristol.ac.uk, carlos.martinez-perez@bristol.ac.uk, phil.donoghue@bristol.ac.uk 2Institut Cavanilles de Biodiversitat i Biologia Evolutiva, Universitat de Valencia, C/ Catedratic Jose Beltran Martınez 2, 46980, Paterna, Valencia, Spain; hector.botella@uv.es, carlos.martinez-perez@uv.es 3Department of Geosciences, University of West Georgia, Carrollton, GA 30118, USA; bdeline@westga.edu 4School of Earth & Environmental Sciences, University of Manchester, Manchester, M13 9PT, UK; robert.sansom@manchester.ac.uk 5School of Life Sciences, University of Lincoln, Riseholme Hall, Lincoln, LN2 2LG, UK; mruta@lincoln.ac.uk *Corresponding authors Typescript received 2 October 2019; accepted in revised form 27 February 2020 Abstract: Morphological variation (disparity) is almost aspects of morphology. Phylomorphospaces reveal conver- invariably characterized by two non-mutually exclusive gence towards a generalized ‘horseshoe’-shaped cranial mor- approaches: (1) quantitatively, through geometric morpho- phology and two strong trends involving major groups of metrics;
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