Genus Scaphisoma Leach, 1815

Remarks: This genus comprises less species in North America that Baeocera, while the opposite is in the Old World. To date, 23 species of Scaphisoma have been reported from the USA (Newton et al., 2001), including S. americanum (Löbl, 1987) originally placed in the subsequently synonymized Caryoscapha (see Leschen & Löbl, 2005). The following four species have been listed from Arizona in Löbl (2018): S. commune Löbl, 1997 based on probably a mislabelled specimen of S. convexum Say, 1825 (see Casey, 1893), S. desertorum Casey, 1893, S. pusillum LeConte, 1860, and S. rufulum LeConte, 1860 .