Fig. 1. Leptictid insectivore skulls. A in New large leptictid insectivore from the Late Paleogene of South Dakota, USA

Fig. 1. Leptictid insectivore skulls. A. Megaleptictis altidens gen. et sp. nov., holotype (KUVP 2568), from the latest Eocene or earliest Oligocene of South Dakota's White River Group, compared to the common species of this time; A1, skull in dorsal view, note the postorbital constriction of the parasagittal crests; A2, lateral view, the teeth and rostrum are taller than in L. dakotensis; A3, stereo pair, ventral view, palate shape, middle ear region, and general tooth features are similar to L. dakotensis; A4, occipital view, the occipital region is blockier than in L. dakotensis. A portion of the supraoccipital region is broken away. B. Leptictis dakotensis Leidy, 1868 (F:AM 108194) from the earliest Oligocene of North Dakota's White River Group; B1, dorsal view, the parasagittal crests are nearly straight and parallel; B2, lateral view; B3, stereo pair, ventral view; B4, occipital view. Photographs (B1, B2, and B4) from Novacek (1986: fig. 2). Scale bars 10 mm.