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Taxonomy
Lignimus hibbardi was named by Storer (1973). Its type locality is WaKeeny (UM-K6-59), which is in a Clarendonian channel sandstone/claystone in the Ogallala Formation of Kansas.
It was recombined as Parapliosaccomys hibbardi by Korth (1987); it was recombined as Phelosaccomys hibbardi by Korth and Reynolds (1994), Korth (1997), Korth (1998), Korth and Chaney (1999).
It was recombined as Parapliosaccomys hibbardi by Korth (1987); it was recombined as Phelosaccomys hibbardi by Korth and Reynolds (1994), Korth (1997), Korth (1998), Korth and Chaney (1999).