. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. DENISON: THE CYATHASPIDIDAE 405. Fig. 137. Poraspis polaris, type (from Kiaer and Heintz, 1935); dorsal shield, Paleontologisk Museum, Oslo, D 665 (X 3). A, dorsal view; B, lateral view of right side. orb, orbit; pbl, postbranchial lobe; pm, pineal macula. psala, 20, fig. 5; Holmgren, 1942, K. Svensk. Handl., (3), 20, no. 1, p. 10, fig. 7. Type.—Paleontologisk Museum, Oslo, D 665, dorsal shield (fig. 137). Occurrence.—Early Devonian (Gedinnian), Primaeva, Polaris, and Anglaspis horizons,
. The Cyathaspididae; a family of Silurian and Devonian jawless vertebrates. Cyathaspididae. DENISON: THE CYATHASPIDIDAE 405. Fig. 137. Poraspis polaris, type (from Kiaer and Heintz, 1935); dorsal shield, Paleontologisk Museum, Oslo, D 665 (X 3). A, dorsal view; B, lateral view of right side. orb, orbit; pbl, postbranchial lobe; pm, pineal macula. psala, 20, fig. 5; Holmgren, 1942, K. Svensk. Handl., (3), 20, no. 1, p. 10, fig. 7. Type.—Paleontologisk Museum, Oslo, D 665, dorsal shield (fig. 137). Occurrence.—Early Devonian (Gedinnian), Primaeva, Polaris, and Anglaspis horizons, Fraenkelryggen division, Red Bay series, 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 Denison, Robert H. (Robert Howland), 1911-1985; Chicago Natural History Museum. Chicago : Chicago Natural History Museum Press
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