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Loxolophus grangeri
Taxonomy
Protogonodon grangeri was named by Simpson (1936). Its type locality is Barrel Spring Arroyo (Taeniolabis Zone), which is in a Puercan terrestrial horizon in the Nacimiento Formation of New Mexico.
It was synonymized subjectively with Loxolophus pentacus by Van Valen (1978), Middleton (1983); it was synonymized subjectively with Loxolophus stenognathus by Williamson and Lucas (1993), Williamson (1996); it was recombined as Loxolophus grangeri by Robison (1986), Eberle and Lillegraven (1998).
It was synonymized subjectively with Loxolophus pentacus by Van Valen (1978), Middleton (1983); it was synonymized subjectively with Loxolophus stenognathus by Williamson and Lucas (1993), Williamson (1996); it was recombined as Loxolophus grangeri by Robison (1986), Eberle and Lillegraven (1998).