The Oulocrepis -group of species Clay (1940) included a great variety of species in her Species Groups I–L, most of which belong to the genera Oulocrepis Kéler, 1940, Gonotyles Kéler, 1940, Solenodes Kéler, 1940 and “ Gonocephalus Kéler, 1940 ” [preoccupied; see below]. These groups share a mosaic distribution of morphological characters (Table 3), few of which are common to all species, but all are different from those of Goniodes sensu stricto and should be recognised as separate genera, as argued by Mey (2009). Based on the species we have examined, we recognise at least five genera in this group, including two new genera, as follows: Oulocrepis, Gonotyles, Solenodes, Complectodes new genus and Majiodes new genus. Apart from the genera listed in Table 3, a few other smaller groups may belong to the Oulocrepis -group, but as we have not examined specimens of those smaller groups, we do not treat them further here. The only named genus not included in Table 3 that definitely belongs to this group is Astrocotes Kéler, 1940. Most species included in the Oulocrepis -group share the following characters (although some characters are absent or different in some genera): male flagellomere I modified in distal end; temples sexually dimorphic; only mts5 situated on occipital process; meso- and metasterna absent, and no setae on ventral thorax; male tergopleurite IX not fused with central plate (but may overlap); abdominal chaetotaxy generally with few meso- or macrosetae, particularly on ventral side; female abdominal segment IX+X expanded distally to form distinct lobes on which at least some macrosetae are situated; bifid process of female genitalia absent; vulval margin convex in almost all species, with lateral sections on each side often bulging or forming distinct lobes on which all or most of the marginal setae are situated; vulval submarginal setae typically clearly identifiable as either slender or thorn-like setae in submarginal row. All species of the Oulocrepis -group, except those in Gonotyles, have triangular processes lateral to the female vulval margin, suggesting that Gonotyles may be more distantly related. As many of the characters listed above are not present in Goniodes sensu stricto, it is possible that Gonotyles does not belong to the Oulocrepis -group, but it is retained in here with respect to the placement of species in Group J by Clay (1940), implying that she believed these were closely related. If Gonotyles does belong in the Oulocrepis -group, it seems plausible that Astrodes Kéler, 1940, Kelerigoniodes Conci, 1946 and possibly Stenocrotaphus Kéler, 1940 may also belong in this group, but more detailed examination of specimens is required. We regard Oulocrepis and Gonotyles as polytypic. Furthermore, considering the morphological differences between two groups within Gonotyles, we recognise them as subgenera, including the new subgenus Gonotyles (Syrmatichares) new subgenus. In addition, several species are placed as incerta sedis within Gonotyles because they need redescription and may represent a separate subgenus or genus. The differences among the male genitalia of all species of Oulocrepis also suggest that several subgenera are involved, but a more comprehensive revision of the genus is needed to determine generic boundaries. All other genera in this group are smaller and morphologically homogeneous. In Table 3, we have summarised the most important and most easily distinguishable features among these genera, but more differences are detailed under the diagnosis of each genus, below.

Published as part of Gustafsson, Daniel R., Li, Zhu, Tian, Chunpo, Ren, Mengjiao, Sun, Xiuling & Zou, Fasheng, 2025, Revision of genera in Goniodidae (Phthiraptera: Ischnocera) parasitising gamefowl (Aves: Galliformes) with descriptions of six new genera, one new subgenus and seven new species, pp. 1-99 in Zootaxa 5731 (1) on page 39, DOI: 10.11646/zootaxa.5731.1.1, http://zenodo.org/record/18019316