Fig. 4

Mesobiotus mandalori from Sweden (a) whole body, live animal in water; (b) bucco-pharyngeal apparatus, lateral view in Hoyer’s medium; (c) dorsal oral cavity armature in water; (d) ventral oral cavity armature in Hoyer’s medium; (e) placoid morphology, dorsal view in water; (f) placoid morphology, lateral view in water; (g) placoid morphology, dorsal view in Hoyer’s medium. Black full arrows indicate first band of teeth; black flat arrowheads indicate the location of the constriction of the third macroplacoid.