Development and Replacement Order of Pharyngeal Teeth in the Golden Shiner, Notemigonus Crysoleucas
Pharyngeal teeth and arches of larval, juvenile, and adult golden shiners were cleared and stained to determine development and replacement order. The first pharyngeal teeth ankylosed in the order 4-5-3-2-1, differing from that in Catostomus but similar to that in the Japanese cyprinid Gnathopogon coerulescens. The first 3 sets of replacement teeth differed in shape from their predecessors as has been reported in other cyprinids. The order of ankylosis of the first pharyngeal teeth differed from the replacement order in juveniles and adults. Of the arches examined, 52% showed the replacement order 4-2-5-3-1 and 16% showed the replacement order 4-2-5-1-3. Replacement order in the golden shiner was similar to that in Semotilus, Clinostomus, and G. coerulescens. A normal second row of pharyngeal teeth was not found in golden shiner larvae: the occurrence of a second row of teeth was considered to be an anomaly in the replacement pattern and not a recapitulation of multi-rowed ancestry.
Author Institution: Ecological Analysts, Inc.
The Ohio Journal of Science. v81, n1 (January, 1981), 14-18