. Early Devonian fishes from Utah : Arthrodira. Fishes, Fossil; Paleontology -- Devonian; Paleontology -- Utah. DENISON: EARLY DEVONIAN FISHES 497 five-sided plate with two long, subparallel sides ia-b, d-e), with one end pointed {h-c, c-d) and the other slightly convex ia-e). There are no external overlap areas, and while internal ones are possible on sides a-h, h-c, and d-e, they are not certain. At all of the margins except a-e, the bone tapers to a thin edge. Margin a-e is thick and bluntly cut off and probably abutted against another plate. It is possible that PF 540 is a postsuborbital a
. Early Devonian fishes from Utah : Arthrodira. Fishes, Fossil; Paleontology -- Devonian; Paleontology -- Utah. DENISON: EARLY DEVONIAN FISHES 497 five-sided plate with two long, subparallel sides ia-b, d-e), with one end pointed {h-c, c-d) and the other slightly convex ia-e). There are no external overlap areas, and while internal ones are possible on sides a-h, h-c, and d-e, they are not certain. At all of the margins except a-e, the bone tapers to a thin edge. Margin a-e is thick and bluntly cut off and probably abutted against another plate. It is possible that PF 540 is a postsuborbital and that it joined the suborbital at this edge. In Dinichthys and Coccosteus the suborbital externally overlaps the postsuborbital, and the latter is a relatively small, triangular plate, but the suborbital of Aethaspis utahensis (PF 1403) has a bluntly I. Fig. 102. Arctolepida indet., possible supragnathals (X 3). A-C, PF 1645; D, E, PF Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Denison, Robert H. (Robert Howland), 1911-1985; Roy, Sharat Kumar, 1897-1962, joint editor Chief Curator, Dept. of Geology; Ross, Lillian A. joint editor Associate Editor of Scientific Publications. [Chicago] Chicago Natural History Museum Press
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Keywords: ., bookcentury1900, bookcollectionbiodiver, booksubjectfishesfossil
