‘ OEDOTHORAX’ SEXMACULATUS SAITO & ONO, 2001 INCERTAE SEDIS Oedothorax sexmaculatus Saito & Ono, 2001: 5, figs 5–9 (Dmf). Oedothorax sexmaculatus Ono et al., 2009: 284, figs 343–347 (mf). Type material: Holotype: Japan: Hunshu, Fukuschima Pref., Yama-gun, Azuma-yama Mts., Jododaria, ♂, 11.vi.1986, leg. K. Kumada (NSMT-Ar 4572, not examined). Paratypes: same data as holotype, 5♂ 6♀ (NSMT-Ar 4573–4574, not examined); Gunma Pref., Tone-gun, Katashina-mura, Marunuma, 1♂ 1.vi.1983, leg. H. Saito (NSMT-Ar 4575, not examined). Diagnosis: Males: This species can be distinguished by the variegated opisthosoma, the palpal apophysis and the depiction of the bulbal structure in figures 8 and 9 in Saito & Ono (2001), in which the individual structures of the embolic division are unfortunately not clearly recognizable. Females: This species can be identified by the dorsal pattern of opisthosoma with six dark patches, and the epigynal external morphology illustrated in figure 9 in Saito & Ono (2001). Distribution: Japan: Honshu. Remarks: The description of Saito & Ono (2001) is in accordance with the general combination of somatic characters of Oedothorax, Mitrager and other related taxa. Although the configuration of the embolic division is not fully recognizable in their drawings, the embolus seems to be prolaterally spiralled (fig. 8 in Saito & Ono, 2001), but the ARP tip is not pointed at tip and not spiral as in Oedothorax; its PC has a clearly broader distal part (fig. 6 in Saito & Ono, 2001) than in Oedothorax. The six distinct spots on the opisthosoma is seen neither in Oedothorax s.s. nor in Mitrager. Due to these dissimilarities, this species most probably belongs to another genus.

Published as part of Lin, Shou-Wang, Lopardo, Lara & Uhl, Gabriele, 2022, Evolution of nuptial-gift-related male prosomal structures: taxonomic revision and cladistic analysis of the genus Oedothorax (Araneae: Linyphiidae: Erigoninae), pp. 417-584 in Zoological Journal of the Linnean Society 195 on page 553, DOI: 10.1093/zoolinnean/zlab033, http://zenodo.org/record/6967774