Acanthophotopsis falciformis Schuster

Acanthophotopsis falciformis falciformis Schuster, 1958 . Ent. Amer. 37: 13. Male. Holotype data: Palm Springs, California, male, fall, 1932, T. Zschokke (UMSP).

Acanthophotopsis falciformis furcisterna Schuster, 1958 . Ent. Amer. 37: 14. Male. Holotype data: Tucson, Arizona, 5.Oct.1935, O. Bryant (UMSP).

Diagnosis of male. The male of this species can be recognized by unique quadridentate mandibles (Fig. 1; also see Figs 6 & 12 of Tanner et al. 2009). The mandibles have three apical teeth, plus a fourth tooth that projects posteriorly over the clypeus (Fig. 1). Also, the males have the posterior head margin elongate posteriorly, large conical mesosternal processes, only a single spur on the tibia of the middle leg, a paramere of the genitalia that is squat, and a cuspis that is curled apically (Fig. 49).

Female. Unknown, possibly it will be mistaken as a species of Sphaeropthalma near Sphaeropthalma blakeii .

Material examined. California, Riverside Co.: Deep Canyon, 5 males, 2. May.1963, 2 males, 3. May.1963, 3 males, 16. May.1963, 1 male, 30. May.1963, 2 males, 8.Oct.1963, coll. M.E. Irwin and E.I. Schlinger, 12 males, 9.Oct.1963, coll. M.E. Irwin and E.I. Schlinger (UCRC, EMUS); 2 males, 18.May. 1969, coll. M.E. Erwin; 2 males, 21–29.May. 1973 2 males, 27.May–1. Jun.1970, 2 males, 18.May.1969, coll. M.E. Erwin; 1 male, 24.May.1969, coll. M.E. Erwin and S. Frommer, 3 males, 13–18. Jun.1969, 1 males, 15. Jun.1969, 3 males, 18–19. Jun.1969, 4 males, 20–24. Jun.1969, 3 males, 2–3. Jul.1969, 1 male, 30– 31.Jul.2007.

Distribution. Nevada and southern Utah south into California, Arizona, and as far southwest as Zacatecas, Mexico.

Remarks. This species is rarely collected and is not limited to Deep Canyon. This genus was recently revised by Tanner et al. (2009).