Gull River Formation

Simple thelodontid-type scales with faint striations on the anterior of the crown have been recovered from residues processed by Darby (1982) from the Gull River Formation in Ontario (Figure 10.3a). 

Figure 10.3 (a) Antero-lateral view of a thelodontid scale from the Gull River Formation,... 

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See also in sourсe #XX -- [ ]

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