Exechia longichaeta Wu, Xu & Yu, 2004

Lindemann, Jon Peder, Soli, Geir & Kjaerandsen, Jostein, 2021, Revision of the Exechia parva group (Diptera: Mycetophilidae), Biodiversity Data Journal 9, pp. 67134-67134 : 67134

Exechia longichaeta Wu, Xu & Yu, 2004

Exechia longichaeta Wu, Xu & Yu, 2004: 555 ♂ ( Wu et al. 2004)

Distribution

Palaearctic, Oriental, China

Taxon discussion

Wu et al. (2004) suggested that the species was similar to E. pollex Shaw, 1935, which is closely related to E. spinigera Winnertz, 1863 in the E. fusca group. However, based on the shape of the deeply biforked hypandrial lobe, as well as the elongate GLs with apical setae (Fig. 24 a), we consider it more appopriate to place the species within the E. parva group. Comparison of illustrations of male terminalia in ventral view indicates that E. longichaeta is likely a close ally of, or possibly even a junior synonym of E. pararepanda. This is evident when considering that, in both species, the apical part of the hypandrium is not distinctly fused with the gonocoxites, as well as the shape and apical setae of the GLs and the profile of the DB of the gonostylus. It is possible that the two species are sympatric, as E. longichaeta is distributed as far south-west as Kunming, Yunnan ( Wu et al. 2004).

Notes

We did not have the opportunity to re-describe this species; however, the male terminalia are well illustrated in Wu et al. (2004).