. Bulletin. Natural history; Natuurlijke historie. Fig. 29. Reconstructed skulls of pachypleurosaurs in dorsal aspect. A, Neusticosaurus modified from Carroll and Gaskill (1985), Mateer (1976) and Sander (1989); B, ""Pachypleurosaurus" after Carroll and Gaskill (1985); C, Anarosaurus modified from Carroll (1981) after Nopsca (1928b); D, Keichou- saurus modified from Young (1958) after photographs (courtesy of N. Mateer). Compare with Fig. 7. Scale bars = cm. both have small temporal fenestrae, thickened ribs, relatively short femora, and three [variably four (Zangerl 1935)]
. Bulletin. Natural history; Natuurlijke historie. Fig. 29. Reconstructed skulls of pachypleurosaurs in dorsal aspect. A, Neusticosaurus modified from Carroll and Gaskill (1985), Mateer (1976) and Sander (1989); B, ""Pachypleurosaurus" after Carroll and Gaskill (1985); C, Anarosaurus modified from Carroll (1981) after Nopsca (1928b); D, Keichou- saurus modified from Young (1958) after photographs (courtesy of N. Mateer). Compare with Fig. 7. Scale bars = cm. both have small temporal fenestrae, thickened ribs, relatively short femora, and three [variably four (Zangerl 1935)] sacral vertebrae. The sacral ribs are relatively unexpanded at their distal ends. Carroll and Gaskill (1985) distinguished Neus- ticosaurus from Pachypleurosaurus by, among other things, the smaller temporal openings, relatively narrow skull table, smaller humerus to femur length ratio, slightly greater phalangeal formula, relatively broader ribs, and generally smaller size of holotype of Neusticosaurus (BMNH R53) and nu- merous small, probably juvenile, fossils described by Fraas (1896), are from the Germanic Province of central Europe. Specimens once identified as Pachypleu- rosaurus, on the other hand, are common in the famous shales of Monte San Giorgio, Switzerland, and adjacent localities of the Alpine Triassic. Pachypleu- rosaurus is the name coined by Broili (1927) and used coincidentally by Nopcsa (1928a) to replace the preoccupied Pachypleura Cornalia (1854). Carroll and Gaskill (1985) have attempted to draw an adequate anatomical distinction between these taxa. Their study suggests that many previously described fossils have been erroneously assigned to Pachypleurosaurus (, certain specimens discussed by Kuhn-Schnyder 1959; Mateer 1976; Zangerl 1935; and other authors), while actually representing Neusticosaurus. Rieppel (1989) has accepted the conclusions. Please note that these images are extracted from scanned page images that may have been
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