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表2 1818年Nitzsch建立的羽虱属（Goniocotes Nitzsch, 1818）与1940年Kéler建立的网羽虱属（Dictyocotes Kéler, 1940）的部分形态学差异。本研究中所用的狭义羽虱属（Goniocotes s. str.）仅指代该属的模式种以及部分推测为近缘的物种（大概率包含新种G. caoi sp. nov.），该属内仍有大量形态变异有待探索与阐明。举例而言，本研究纳入了另外两个暂归属于羽虱属（Goniocotes）的物种，它们极有可能应被独立为新属，且这两个物种亟需重新修订描述。若需了解本研究界定的羽虱属内其他形态变异案例，请参见本文描述的另外两个新种。 | 性状 | 狭义羽虱属（Goniocotes s. str.） | 非洲孔雀羽虱（Goniocotes afropavo Clay, 1936） | 查平羽虱（Goniocotes chapini Clay, 1936） | 网羽虱属（Dictyocotes Kéler, 1940） | | :---: | :---: | :---: | :---: | :---: | | 触角 | 雌雄同型 | 雌雄同型 | 雌雄异型 | 雌雄同型 | | mts5基部枕状突起 | 存在，且发达 | 缺失 | 缺失 | 存在，但可能较小 | | 雄性第II-V腹侧片的背板中央刚毛（ss+tps） | 每侧1-2根 | 每侧2根 | 每侧2-3根 | 每侧>5根 | | 雄性第IX+X侧腹侧片 | 纤细 | 宽大？ | 宽大？ | 宽大 | | 腹部第II-VI节腹板刚毛 | 每侧1-2根 | 每侧1-2根 | 每侧1-2根 | 至少部分体节（通常为III-V节）具2-4根 | | 中体 | 缺失 | 存在？ | 缺失 | 存在 | | 阳基侧突 | 与基腹突愈合 | 与基腹突愈合 | 与基腹突分离？ | 与基腹突分离，可能有关节 | | 雌性生殖孔后缘 | 圆形或扁平 | 狭圆形 | 中部具缺刻 | 中部具缺刻 | | 生殖孔缘刚毛 | 通常每侧<15根 | 图示13根 | 图示19（？）根 | 每侧>20根 |