Millerosteus minor (Miller)
If this fish was not found at only the top of the Mey Subgroup it would have been described as a juvenile Coccosteus cuspidatus. However, the fish does not become any larger than 15-20 cm, while Coccosteus cuspidatus can reach lengths of 40-50 cm. All sizes are known from the very small of up to 20 cm in total length. Also, this fish has tiny tooth like structures on it lower jaw. Perhaps it preyed on the acanthodian Mesacanthus or small invertebrates.