FIG. 2.—Inventory of behavior patterns used in descriptions of plethodontid and rhyacotritonid courtship, showing their assignments to modules and submodules. Module abbreviations: AP ¼ approach, HC ¼ head contact, TSW ¼ tail-straddling walk, SD ¼ spermatophore deposition, POS ¼ positioning. Submodule abbreviations: pur ¼ male pursuit of female, pd ¼ preliminary display, con ¼ contact, tpd1 ¼ transdermal pheromone delivery Type 1, walk ¼ progress aspect of TSW, tpd2 ¼ transdermal pheromone delivery Type 2, oph ¼ olfactory pheromone delivery. Behaviors shown in the same colors occur in the same temporal context. Behaviors shown in shades of the same color occur in the sequence: lighter shade earlier, darker shade later. References for behavioral descriptions: 1 ¼ this study; 2 ¼ Arnold (1972); 3 ¼ Verrell and Mabry (2003); 4 ¼ Kiemnec-Tyburczy and Sapp (2017); 5 ¼ Doten et al. (in press); 6 ¼ Picard (2005); 7 ¼ Organ (1960b); 8 ¼ Organ (1960a); 9 ¼ Organ (1961); 10 ¼ Verrell (1999); 11 ¼ Sapp and Kiemnec-Tyburczy (2011).