. Bulletin. Natural history; Natuurlijke historie. 6 REVISION OF THE GYMNARTHRIDAE PARIOTICHUS BRACHYOPS COPE (1878, p. 502) Type: no. 4328, imperfect skull. Locality: North Fork Little Wichita River, Archer Co., Texas. Age: Either Putnam or Admiral Formation, Wichita Group, Lower Permian. Zone O or I of Romer (1928). The skull was collected by Jacob Boll in 1878 from the lower portion of the valley of the North Fork of the Little Wichita River. Romer (1928, p. 77) has shown that Boll's collection that year was entirely from the lower part of the fossiliferous redbed section. Cope's o
. Bulletin. Natural history; Natuurlijke historie. 6 REVISION OF THE GYMNARTHRIDAE PARIOTICHUS BRACHYOPS COPE (1878, p. 502) Type: no. 4328, imperfect skull. Locality: North Fork Little Wichita River, Archer Co., Texas. Age: Either Putnam or Admiral Formation, Wichita Group, Lower Permian. Zone O or I of Romer (1928). The skull was collected by Jacob Boll in 1878 from the lower portion of the valley of the North Fork of the Little Wichita River. Romer (1928, p. 77) has shown that Boll's collection that year was entirely from the lower part of the fossiliferous redbed section. Cope's original description states that P. brachyops was from the same locality as Bolosaurus rapidens {= Chilonyx rapidens, no. 4356). Redescription of type: The type, and only known specimen, is a crushed skull lacking the occiput and tip of the snout (fig. 1). The parietals, inter-. Figure 1. Pariotichus brachyops Cope. Type skull, no. 4328, dorsal and left lateral views. x3. FR frontal, PA parietal, PF prefrontal, POF postfrontal, PP postparietal, PO postorbital, SQ squamosal, ST supratemporal. parietals and right supratemporals, as a unit, have been pushed forward and to the left underneath the frontals and left side of the skull. The elements of the left orbital region and the supratemporal have preserved their proper relations. The left prefrontal has shifted forward slightly, but that of the right side has retained its normal position with postfrontal, frontal, nasal, and lacrimal. The anterior surface of the snout is damaged but indi- cates, very nearly, the anterior extent of the face. Some uncertainty exists as to the length of parietals and frontals, and the anterior bones are obscured. Nevertheless essential features of the arrangement of the dermal bones are clear and restorations prepared independently by Price and Gregory agree in most Please note that these images are extracted from scanned page images that may have been digitally enhanced
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