Scanning electron micrographs showing selected morphological character states for characters 1 to 6.

<p>A. Mouth cone of <i>Wollunquaderes majkenae</i> showing articulated outer oral styles of equal sizes (character 1, state 0; character 2, state 0). B. Mouth cone of <i>Dracoderes abei</i>, with articulated outer oral styles alternating in size between larger and smaller (marked with *) ones (character 1, state 1; character 2, state 0). C. Outer oral styles in <i>Campyloderes</i> cf. <i>vanhöffeni</i>, being either absent or completely fused with mouth cone (character 3, state 2). D. Mouth cone with partly fused outer oral styles of <i>Condyloderes</i> sp. 1 (character 3, state 1). E. Mouth cone with soft, non-articulated outer oral styles of <i>Pycnophyes communis</i> (character 2, state 1). F. Mouth cone with soft, non-articulated outer oral styles of <i>Pycnophyes kielensis</i> (character 2, state 1). G. Introvert of New Genus, showing basally bifurcated primary spinoscalids (character 4, state 1). H. Detail from neck of <i>Echinoderes microaperturus</i>, showing a trichoscalid attaching to its trichoscalid plate (character 6, state 1). Abbreviations: oos, outer oral styles; pl, placid; psp, primary spinoscalids; tsc, trichoscalid; tsp, trichoscalid plate. Arrows indicate articulations of outer oral style units.