Figure 9. Dendrogram
of similarity between suture patterns, based on angular distance between points
representing the sutures in multidimensional space. Related taxa are coded by
colored boxes: douvilleiceratids - white with black border, bactritids - yellow,
agoniatitids - green, Scaphites - red, and Strenoceras - blue.
Suture patterns included are Agoniatites (Agon), Anetoceras (Anet), Bactrites (Bact), Cyrtobactrites (Cyrt) and Mimagoniatites (Mima), Chelinoceras (Chel), Douvilleiceras (Douv), Hamites (Hami), Leptoceras (Lept), Paraspiticeras (Para), Scaphites (Scap), and Strenoceras (Stren). The numbers after Scaphites and Strenoceras refer to the position in the ontogenetic series with 1 being earliest.