Figure 1. Measurements on the petrosal and second upper molar used in this paper. A, B, measurements on the promontorium (PROM) of the petrosal (PET) and second upper molar (M2) for the regression analysis and attribution of Itaboraí specimens; A corresponds to a posterolateroventral view of the virtually reconstructed petrosal UFRJ-DG 1036-M, and B to an occlusal view of M1−3 of Protolipterna ellipsodontoides DNPM LE444A [modified (mirrored) from Cifelli, 1983b: fig. 4]; C, D, measurements taken on the petrosal for the regression analysis on the scaling effects between the petrosal and bony labyrinth; C, lateroventral view of the same petrosal as in A; D, cerebellar view of the same petrosal. Abbreviations: H, height; L, length; W, width.

Published as part of Billet, Guillaume, Muizon, Christian De, Schellhorn, Rico, Ruf, Irina, Ladevèze, Sandrine & Bergqvist, Lilian, 2015, Petrosal and inner ear anatomy and allometry amongst specimens referred to Litopterna (Placentalia), pp. 956-987 in Zoological Journal of the Linnean Society 173 (4) on page 960, DOI: 10.1111/zoj.12219, http://zenodo.org/record/10106367