Table 2 in The Goniodidae (Phthiraptera: Ischnocera) of peafowl (Aves: Galliformes: Pavo), with description of a new genus

Table 2. Some morphological differences in head and genitalic characters among four species of Goniodes Nitzsch, 1818, representing four groups of lice considered closely related by Clay (1940), von Kéler (1940) and Mey (2009). The list is not exhaustive, and redescriptions of species not found on peacocks will be published elsewhere, with more detailed comparisons between these groups.
GoniodesGoniodes pavonismeinertzhageniGoniodes spinicornisGoniodes megacerosCharacter(Linnaeus, 1758)(Clay, 1940)(Nitzsch [in Giebel], 1866)(Kellogg and Paine, 1914)Head setae as1–3,VentralVentralVentralDorsalavs1Male conusStrongly curvedFollowing curve ofFollowing curve of head,Bulky, near rectangularposteriorlyheadwith slight appendixconi (?) pointingposteriorlyPosterior marginWith singleWith singleWith single completelyWith two apicallyof scapeapicallyapicallysquamous thumb,squamous extensions,squamoussquamoussquamous posteriorthe proximal one withthumb andthumb and nomargin, and thickeneddistal bulges and themore distalthickened setaeseta distallydistal one with thickenedthickened setaseta on dorsal surfaceBasal apodemeShorter than distalLong and slender,Long and slender, fusedLong and stocky, fusedelements,fused distally todistally to mesosomedistally to mesosometrapezoidal; notmesosome andand parameresand parameresfused toparameresmesosome andparameresMesosomeLarge,Simple, tongue-Distally tongue-like,Seemingly absent,complicated,likeproximally withstructure possiblydistally bifid,complicated ventralhomologous towith distinctcarinae and laterallygonopore present atU-shapedflaring gonoporepoint of fusion withventralbasal apodemegonoporeParameresLong, wideningLong and slender,Short, pointedLong, distally stronglydistallydistal endscurvedseemingly softFemaleAbsentPresent; stronglyPresent; medianlyBroadly fused but weaklysubgenitalstriated parallelinterrupted plates nearsclerotised plateplateplates fusedvulval marginonly at vulvalmarginSubvulval platesSmall, oval, notLong and curved,Two plates on each side:Small, oval partiallynear vulvalmostlyproximal plates stronglyoverlapping subgenitalmarginoverlappingsinuous, with anteriorplatesubgenitalend overlappingplatessubgenital plate; distalplates small, roughlytriangular near terminalend of abdomenInternal sclerite ofPaired,Paired,Paired, asymmetrical andAbsentfemalesymmetrical andsymmetricalfused anteriorlygenitaliafused anteriorlyand fusedanteriorly