. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 15. A, Amia calva. Recent, Wisconsin; above, lateral, and below, dorsal views of skull. B, Amia scutafa. Early and Middle Oligocene; above, lateral, and below, dorsal views of skull (sensory canal system and pit-lines are not known since skull elements are in articulation). C, Amio fragosa, Late Cretaceous to Middle Eocene; above, lateral, and below, dorsal views of skull (sensory canal system and pit-lines after Estes, 1964). D, Amia uinfaensis, Paleocene to Early Oligocene; above, lateral, and below, dorsal vie
. Bulletin of the Museum of Comparative Zoology at Harvard College. Zoology. Fig. 15. A, Amia calva. Recent, Wisconsin; above, lateral, and below, dorsal views of skull. B, Amia scutafa. Early and Middle Oligocene; above, lateral, and below, dorsal views of skull (sensory canal system and pit-lines are not known since skull elements are in articulation). C, Amio fragosa, Late Cretaceous to Middle Eocene; above, lateral, and below, dorsal views of skull (sensory canal system and pit-lines after Estes, 1964). D, Amia uinfaensis, Paleocene to Early Oligocene; above, lateral, and below, dorsal views of skull (sensory canal system is only known in the mandible, operculum, nasal, lacrimal, antorbital, extrascapular, and suprascapular, all of which conform with those of A. calva). Abbreviations: a, angular; ao, antorbital; br, branchiostegal rays; d, dentary; ds, dermosphenotic; es, extrascapular; fr, frontal; io, interoperculum; io- io'' io'* io'^', infraorbital series (suborbitals & postorbifals); la, lacrimal; m, maxilla; n, nasal; op, operculum; p, preoperculum; pa, parietal; pt, pterotic; r, rostral (ethmoid); s, suprascapular; so, surangular; sm, supramaxilla; so, suboperculum. Dotted lines indicate the sensory canal system; dashed lines indi- cate pit-lines. 38. 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 Harvard University. Museum of Comparative Zoology. Cambridge, Mass. : The Museum
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