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Bone histology, phylogeny, and palaeognathous birds (Aves: Palaeognathae)

Abstract : The presence of a phylogenetic signal in the variation of osteohistological features has been recently debated in the literature. Previous studies have found a significant signal for some features, but these results were obtained on a small amount of characters and a reduced sample. Here we perform a comprehensive study in which we quantify the phylogenetic signal on 62 osteohistological features in an exhaustive sample of palaeognathous birds. We used four different estimators to measure phylogenetic signal – Pagel's λ, Abouheif's Cmean, Blomberg's K, and Diniz-Filho's phylogenetic eigenvector regressions PVR – and four topologies taken from the literature. Bone size and bone vascular density exhibit a strong phylogenetic signal, whereas all but four of the remaining features measured at the histological level – cellular size in caudal and medial transects of femora, and proportion of oblique vascular canals in rostral and caudal transects of tibiotarsi – exhibit a weaker signal. We also found that the impact of the topologies used in the analyses is very low compared with that of sample size. We conclude that the analysis of a comprehensive sample is crucial to obtain reliable quantifications of the phylogenetic signal.
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Contributor : Marie José Queyroy Connect in order to contact the contributor
Submitted on : Thursday, November 24, 2016 - 11:10:17 AM
Last modification on : Friday, June 10, 2022 - 1:32:02 PM

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Lucas Legendre, Estelle Bourdon, R. Paul Scofield, Alan J.D. Tennyson, Hayat Lamrous, et al.. Bone histology, phylogeny, and palaeognathous birds (Aves: Palaeognathae). Biological Journal of the Linnean Society, Linnean Society of London, 2014, 112 (4), pp.688-700. ⟨10.1111/bij.12312⟩. ⟨hal-01402083⟩



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