Table 2. Some morphological variation between Goniocotes Nitzsch, 1818 in Separation of Goniocotes Burmeister, 1838, and Dictyocotes Kéler, 1940 (Phthiraptera: Ischnocera), with descriptions of four new species

Table 2. Some morphological variation between Goniocotes Nitzsch, 1818, and Dictyocotes Kéler, 1940. Goniocotes s. str. as used here refers only to the type species of this genus and some presumably closely related species (likely including G. caoi sp. nov.), and much variation remains to be explored and understood within this genus. As an example, we have included two other species here retained in Goniocotes, which likely warrant recognition as separate genera. These two species are in need of redescription. For examples of other morphological variation within Goniocotes as circumscribed here, see the other two new species described here.
CharacterGoniocotes s. str.Goniocotes afropavo Clay, 1936Goniocotes chapini Clay, 1936Dictyocotes Kéler, 1940AntennaeSexually monomorphicSexually monomorphicSexually dimorphicSexually monomorphicOccipital bulge at base of mts5Present, largeAbsentAbsentPresent, but may be smallTergocentral setae (ss+tps) of male tergopleurites II–V1–2 per side2 per side2–3 per side>5 per sideMale lateral tergopleurite IX+XSlenderBroad?Broad?BroadSternal setae on abdominal segments II–VI1–2 on each side1–2 on each side1–2 on each side2–4 on at least some segments (typically III–V)MesosomeAbsentPresent?AbsentPresentParameresFused to basal apodemeFused to basal apodemeSeparate from basal apodeme?Separate from basal apodeme, possibly articularingFemale vulval marginRounded or flatNarrowly roundedMedianly notchedMedianly notchedVulval marginal setaeTypically <15 on each side13 illustrated19 (?) illustrated>20 on each side