pinnae impares
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pinna impare — (plural pinnae impares)) median fin (one of those fins located on the sagittal plane of the body, the dorsal, caudal and anal fins. Also called perissopterygium) … Dictionary of ichthyology
pinna impare — (plural pinnae impares)) median fin (one of those fins located on the sagittal plane of the body, the dorsal, caudal and anal fins. Also called perissopterygium) … Dictionary of ichthyology