. Bulletin. Natural history; Natuurlijke historie. 32 PEABODY MUSEUM BULLETIN 43. Fig. 9. Morphological diversity of the dorsal ridge scales of semionotid fishes from cycle P4, Towaco Formation, Newark Basin. Scales rim the dorsal midline between the nape and the origin of the dorsal fm. The anterior direction is toward the right in each series pictured; spines are directed posteriorly. A, simple scales, corresponding to those of the simple-scale group (Olsen and others 1982); B, modified simple scales; C, small scales, corresponding to those of the small-scale group (Olsen and others 1982); D
. Bulletin. Natural history; Natuurlijke historie. 32 PEABODY MUSEUM BULLETIN 43. Fig. 9. Morphological diversity of the dorsal ridge scales of semionotid fishes from cycle P4, Towaco Formation, Newark Basin. Scales rim the dorsal midline between the nape and the origin of the dorsal fm. The anterior direction is toward the right in each series pictured; spines are directed posteriorly. A, simple scales, corresponding to those of the simple-scale group (Olsen and others 1982); B, modified simple scales; C, small scales, corresponding to those of the small-scale group (Olsen and others 1982); D, thin-spined scales, corresponding to those of the "5'. micropterus group" (Olsen and others, 1982); E, globular scales; F, robust scales, corresponding to those of the 5'. lenmceps group (Olsen and others 1982); G, concave scales, corresponding to those of the 5. elegans group (Olsen and others 1982). Reproduced from McCune and others, 1984, Semionotid fishes from the Mesozoic great lakes of North America, p. 27-44. In A. A. Echelle and I. Kornfeld [eds.] Evolution of fish species flocks. University of Maine Press, 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 Peabody Museum of Natural History. New Haven : The Museum
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