. Chordate morphology. Morphology (Animals); Chordata. CHEIROLEPIS ^dorsal fin. STEGOTRACHELUS PTERONISCULUS Figure 2-16. Three palaeoniscoid fishes as restored. Stegotrachelus and Cheiro/epis are from the Upper Devonian, and Pteroniscu/us is Triassic. ACENTROPHORUS. 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 Jollie, Malcolm. New York, Reinhold

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