Omorgus is considered a synonym of Trox and its spp. are treated as "suberosus group"; see also(1)
key, p. 24; species descriptions: • acanthinus 50 • aequalis 29 • affinis 30 • asper 68 • atrox 33 • capillaris 55 • carinatus 63 • contractus 46 • fascifer 31 • foveicollis 39 • frontera 41 • fuliginosus 66 • gemmulatus 49 • hamatus 34 • inflatus 70 • insularis 41 • laticollis 32 • loxus 58 • monachus 64 • nodosus 72 • plicatus 52 • punctatus 69 • robinsoni 47 • rubricans 61 • scaber 28 • scabrosus 67 • scutellaris 77 • sonorae 43 • sordidus 55 • spinulosus 35 • s. dentibius 38 • s. simi 37 • s. spinulosus 38 • striatus 31 • suberosus 60 • terrestris 40 • tesselatus 71 • texanus 75 • tomentosus 63 • tuberculatus 50 • tytus 57 • umbonatus 76 • unistriatus 56 • variolatus 53

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