Calcified cartilage in the paired fins of the osteostracan Escuminaspis laticeps (Traquair 1880), from the Late Devonian of Miguasha (Québec, Canada), with a consideration of the early evolution of the pectoral fin endoskeleton in vertebrates. 
Publisher: Journal of Vertebrate Paleontology 24 (4)  : 773-779
Published:  2004