. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 104 ANNALS OF THE SOUTH AFRICAN MUSEUM M. parvus Boonstra. Genus Maraisaurus Boonstra. Boonstra, 1953, p. 62. Genotype. Diagnosis Small Pristerognathids with dental formula unknown but probably , , Skull very small [Max. Length (as reconstructed) 162? mm.]; preorbital depression very deep with sharp rim; frontal with moderate entry into orbital border; postfrontal well developed; orbits large and just entering anterior half of skull. Sagittal crest of parietals fairly low, but with sha
. Annals of the South African Museum = Annale van die Suid-Afrikaanse Museum. Natural history. 104 ANNALS OF THE SOUTH AFRICAN MUSEUM M. parvus Boonstra. Genus Maraisaurus Boonstra. Boonstra, 1953, p. 62. Genotype. Diagnosis Small Pristerognathids with dental formula unknown but probably , , Skull very small [Max. Length (as reconstructed) 162? mm.]; preorbital depression very deep with sharp rim; frontal with moderate entry into orbital border; postfrontal well developed; orbits large and just entering anterior half of skull. Sagittal crest of parietals fairly low, but with sharp edge. Maraisaurus parvus Boonstra (Fig. 21). Genotype. 11944. Buffelsvlei, Beaufort West. Coll. Marais. The posterior two thirds of a somewhat weathered skull lacking the snout. Lateral view (Fig. 216). The articulatory region of the lower jaw has recently been figured and described (Boonstra, 1953, p. 62). The prefrontal has a sharp dorsal edge separating r.^ a small lateral from a larger dorsal .', j ,v> face. The jugal is well developed \ '•; , ; ! with an anterior ramus forming the | ' • • » stout suborbital bar; a weaker WW*. • ! J '. • dorsal ramus forming the lower half of the orbital bar and a fairly long posterior ramus, overlain by an anterior ramus of the squamosal, forming the anterior and much of the ventral part of the lower temporal arch. The postorbital is small forming only a small part of the orbital margin and posteriorly extending as a weak tongue on to the lateral face of the parietal. The squamosal has a moderate descending flange carrying the quadrate complex but not extending far ventrally so that the quadratic condyle still lies well above the level of the lower border of the dentary. In dorsal view (Fig. 21a) it is seen that the temporal fossa is fairly long and wide, the inter- temporal region narrow and the sagittal crest low but sharp. The frontal is long and has a fairly large entry into the orbital border; the. Fig
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Keywords: ., bookcentury1800, bookdecade1890, booksubjectnaturalhistory, booky
