Gladbachus reveals a mosaic stem-chondrichthyan anatomy
CT and histology of the single compressed specimen UMZC 2000.32 reveal a roughly 385 Ma stem chondrichthyan combining placoderm-like, osteichthyan-like and chondrichthyan features, demonstrating disparity without supplying a crown-shark ancestor.
CT and histology of the single dorsoventrally compressed Gladbachus adentatus specimen UMZC 2000.32 from the Upper Givetian Lower Plattenkalk at approximately 385 Ma reveal a stem chondrichthyan with a mosaic neurocranium, jaws, branchial skeleton, cartilage, scales and teeth; the specimen documents disparity, not a crown-shark ancestor or body-plan FAD.