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1 December 2001 EVIDENCE FOR LACK OF CHOANAE IN THE POROLEPIFORMES
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Abstract
New material from the Emsian (Lower Devonian) of Spitsbergen, consisting of lower jaws and the ethmosphenoid portion of skulls, allows the elucidation of the relations between the dermopalatine, the vomer and the ethmoid region in porolepiformes. It shows that the fenestra endochoanalis was certainly occluded by the ethmoidal process of the palatoquadrate and that a fenestra exochoanalis is not present between the vomer, dermopalatine, maxilla and premaxilla.
and GAËL CLEMENT "EVIDENCE FOR LACK OF CHOANAE IN THE POROLEPIFORMES," Journal of Vertebrate Paleontology 21(4), (1 December 2001). https://doi.org/10.1671/0272-4634(2001)021[0795:EFLOCI]2.0.CO;2
Received: 15 January 2001; Accepted: 3 August 2001; Published: 1 December 2001
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