TABLE 1 in Percussiopalpus gen. n. from Turkey, a free-living relative of cave-dwelling Thaumastocephalus, and revised placement of Thaumastocephalini (Coleoptera: Staphylinidae: Pselaphinae)

TABLE 1. Major morphological differences between genera of Thaumastocephalini.
ThaumastocephalusPercussiopalpusfrontal sulcuswith diffuse marginswith sharply marked marginsanterior region of frons (= frontal ‘rostrum’)abruptly, step-wise narrowed posteriorlygradually broadening posteriorlytempora and neck regiongradually confluentabruptly delimitedposterior tentorial pitscloser to submental bulgecloser to neck regionmaxillary palpomere 4with concave distal marginwith convex distal marginpronotumbarrel-shapedcordiformlateral pronotal foveaelackingpresentlateral longitudinal pronotal sulcilackingpresentmedian longitudinal pronotal sulcuslacking or faintsharply markedmesoscutellar shieldstrongly elongateabout as long as broadsubmedian metaventral fovea just behind mesocoxal restpresentlackingbasal elytral foveaelackingpresentsutural and discal elytral strialackingpresentpaired basal discal carinae on tergite IVlackingpresentlateral foveae on tergite IVtwo pairsone pairsubmedian foveae on sternite IVlackingpresent