Figure 12 in Contributions to scorpion systematics. II. Stahnkeini, a new tribe in scorpion family Vaejovidae (Scorpiones: Chactoidea)

Figure 12: Basal pectinal teeth of female Serradigitus joshuaensis (top), Borrego Springs, California, and female Serradigitus minutis (bottom), Cabo San Lucas, Baja California Sur, Mexico, showing details of specialized tooth modifications. Note that the basal tooth exhibits all modifications: Laterally symmetric, and for these species, blunted in appearance (i.e., not elongated as exhibited in many Stahnkeini species), smooth, thus completely lacking a sensorial area. The second tooth exhibits partial modifications, slight angling and a reduced sensorial area. Note, though reduced in area, the density of the individual peg sensilla is the same as that found in the normal tooth. Other teeth lack these modifications, showing distal angling and a full-sized sensorial area.