TABLE 1 in Redescription of a small Caviidae (Rodentia: Hystricognathi) from the Neogene of northwestern Argentina and its systematic implications

TABLE 1. — Compared measurements (in mm) of skull and dentary of Orthomyctera rigens (Ameghino,1888) and Orocavia andina n. comb. Abbreviations: Bw, braincase width; Dl, diastema length; m2l, dorsoventral length at the level of m2 (excluding molariforms); MAEw, external auditory meatus width; MFl, dorsoventral length at the level of the mentonian foramen; p4l, dorsoventral length at the level of p4 (excluding molariforms); Pl, palate length (from the P4 level to the apex of the mesopterigoid fossa); PwM3, palate width at M3 level (measured in the anterior lobe without including teeth); PwP4, palate width at P4 level (measured in the anterior lobe without including teeth); Rl, rostrum length (to nasal-frontal suture); Rw, rostrum width (between nasal-frontal-prmx suture); Iw, interorbital width; Sl, skull length (from nasal-frontal suture); Stl, skull total length (dorsal view). *, average measurements.
OrthomycteraCaviidaerigensindet.Orocavia andina n. comb.MesuresMACN-A 1661 (holotype)MACN-A 1662MACN-Pv 8350 (holotype)FHNM-P 14464FHNM-P 14370MACN-Pv 8351MACN-Pv 8399MACN-Pv 8401FHNM- P 1094MACN-Pv 8300MACN-Pv 8411MACN-Pv 8412MACN-Pv 8414MACN-Pv 8349Stl*55.54–*53.73–*54.26–––––––––Sl––36.06–*39.9336.6137.23–––––––Dl*12.93–14.47–––––––––––Rl––19.68–*14.19–––––––––Rw––8.71–*11.589.719.75–––––––Iw––11.57–*10.5112.8913.11–––––––Bw––24.80–>25.2125.88–24.73––––––PwP41.210–1.042.081.261.611.391.27––––––PwM3––6.087.777.827.688.966.07––––––MAEw––19.71––22.77––––––––Pl11.00–8.179.039.858.649.928.12––––––MFl–4.514.16–––––4.50––3.614.494.61p4l–8.25––––––6.854.63–5.607.23–m2l––7.24–––––7.637.07–7.387.91–