Extended Data Fig. 8: The circulatory system of an adult lamprey Ichthyomyzon bdellium (cyclostome) as a comparative model for anatomical interpretation of that of Norselaspis glacialis.
From: Novel assembly of a head–trunk interface in the sister group of jawed vertebrates
Reconstruction of the circulatory structures with (left) and without (right) morphological correlates in (a) left lateral view to show the left side, (b) sagittal section to show the right side, (c) dorsal view, and (d) ventral view with an additional subpanel (d3) to show the major vessels on the cranial floor under the brain. (e) Pericardium in anterior view with (e1) and without (e2) the heart and arteries, revealing the sinus venosus. (f) Pericardium in posterior view with (f1) and without (f2, 3) the branchial basket and with (f1, 2) and without (f3) the esophagus, axial column, and main chondrocranium.
