Layers with scrapers and denticulate tools alternate. Leaves with three oblong and denticulate leaflets. The leaves are smooth with denticulate or dentate margins and indistinct petioles. The body hairs measure with a denticulate tip. The basal margin is smooth or denticulate within. It has membranous truncate, irregularly denticulate ligules that are big. The pinna apices are finely denticulate. The outer lip is thick and denticulate. The outer lip is thickened, and generally denticulate inside, with distinct teeth or folds. The petals are nearly obovate with denticulate margins and are longer than the stamens. These tubercles are denticulate along the lateral margin. The middle of the dentary has the largest and most denticulate teeth in the jaw. Iapetognathus fluctivagus is a species of denticulate cordylodan conodonts belonging to the genus "Iapetognathus". Outer edge of mesotibia simple, crenulate or denticulate, or with distinct teeth or long spines. The thick outer lip is denticulate and shows on top a little cutout.