P. gypsum Peck, 1973a: 128,

1973b: 103 (no new record), 1977: 195 (additional description).

Holotype female in MCZC (n° 31960).

Type locality: Resumidero de Pablillo (at Pablillo, 55 km SW Linares, 32 km S Galeana), Nuevo León State, Mexico.

Distribution: Mexico: Nuevo León State. Biology: Small-eyed forest soil inhabitant accidentally in a cave and usually in forests around Cerro Potosí, Nuevo León State.