TABLE 1. Summary of proposed morphotypes and taxonomic assignments by author of Trinity Group tribosphenidan lower molars.


Patterson (1956)	Slaughter (1965)
Type 1	Type 4
Type 2	Type 5
Type 3	Type 6 = size of Pappotherium pattersoni

Slaughter (1971)	Turnbull (1971)
SMU 61992 = Pappotherium pattersoni	Types 1, 2, 5 = Holoclemensia
	Types 3, 4, 5 = Pappotherium
Butler (1978)
Type 3 = Kermackia texana
Type 2 = Pappotherium pattersoni
Type 1, 4, 5 = Holoclemensia
Type 6 = Trinititherium slaughteri
SMU 61992 = Slaughteria eruptens