. Bulletin of the British Museum (Natural History), Geology. ethc' H. Pmx rthe R Fig. 18. a. Pteronisculus arambouvgi Lehman. Lower Triassic. After Lehman, 1952. b. Birgeria groenlandica Stensio. Lower Triassic. After Nielsen, 1949. c. Cosmopty- chius strialus (Agassiz). Lower Carboniferous, d. Watsonichthys pectinatus (Traquair). Lower Carboniferous, e. Mesonichthys aitkeni n. gen. (Traquair). Upper Carboni- ferous, f. Nematoptychius greenocki (Traquair). Lower Carboniferous, g. Moythomasia nitida Gross. Upper Devonian. After Gross. 1955. H- Lawnia taylorensis Wilson. Permian. After Wil
. Bulletin of the British Museum (Natural History), Geology. ethc' H. Pmx rthe R Fig. 18. a. Pteronisculus arambouvgi Lehman. Lower Triassic. After Lehman, 1952. b. Birgeria groenlandica Stensio. Lower Triassic. After Nielsen, 1949. c. Cosmopty- chius strialus (Agassiz). Lower Carboniferous, d. Watsonichthys pectinatus (Traquair). Lower Carboniferous, e. Mesonichthys aitkeni n. gen. (Traquair). Upper Carboni- ferous, f. Nematoptychius greenocki (Traquair). Lower Carboniferous, g. Moythomasia nitida Gross. Upper Devonian. After Gross. 1955. H- Lawnia taylorensis Wilson. Permian. After Wilson, 1953. 1. Ichthyokentema purbeckensis (Davis). Upper Jurassic. After Griffith & Patterson, 1963. Summing up, then, as a result of this fragmentation of the palaeoniscoid rostro- premaxillo-antorbital and the reduction and subsequent loss of the postrostral, the snout region of the holostean composed of basically four pairs of bones, the nasals,. 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 British Museum (Natural History). London : BM(NH)
Size: 1988px × 1256px
Photo credit: © Book Worm / Alamy / Afripics
License: Licensed
Model Released: No
Keywords: ., bookauthorbritishmuseumnaturalhistory, bookcentury1900, bookcoll
