Table 4 in Te innen ean and stapes of the basal mammaliafonm Morganucodon nevisited: new infonmation on labyninth monphology and pnomontonial vasculanization

Table 4. Comparison of phylogenetically informative characters between this study, Kermack et al. (1981), Graybeal et al. (1989), and character scorings in various phylogenetic matrices (Zhou et al. 2019, Krause et al. 2020, and Mao et al. 2024). MorphologyOur studyKermack et al. (1981)Graybeal et al. (1989)Krause et al. (2020)Mao et al. (2024)Zhou et al. (2019)Apical inflation of cochlear canalPresentNAAbsentSecondary osseous lamina basePresentPresentAbsentPrimary and secondary osseous laminaAbsentAbsentAbsent218/220443/444380/381Connection between cochlear canal and circum-promontorial plexusPresentAbsentAbsent224Hypocochlear sinusPresentNANA222Anterior epicochlear sinusPresent/ absentNANA222Posterior epicochlear sinusPresentNANA222Stapes shapeBicruralBicruralNA271502440Stapes symmetrySymmet- ricalAsymmetricalNA271Stapes footplate outlineOvalRoundNA503441Stapes anterior bendPresentAbsentNAStapedial crura orientationStraightDivergeNABullate stapedial footplatePresentAbsentNA442 Abbreviation:NA, not applicable