Table 3 in Vietnamellidae (Insecta, Ephemeroptera) of Thailand

Table 3. Comparison of larval characteristics of known Vietnamella species. CharactersV. thaniV. sinensisVietnamella maculosa sp. nov.Vietnamella sp. AVietnamella sp. BMaxillary palp segment ratio1.3:1.3:11:1.6:11.3:1.2:11:0.9:0.71.3:1:1.1Outer pair of projections on headWithout serrationWithout serrationWithout serrationWith serrationWith serrationMedian ridge projection of abdominal tergaPair: I-IXPair: I-XPair: I-XPair: II-IXPair: II-VI, VIII-X; single: VIIPosterolateral projection on tergite XLess developedModerately developed aWell developedModerately developed bModerately developedDistributionVietnam, Thailand, ChinaChinaThailandIndiaThailand a Hu et al. (2017). Definition based on fig. 1A, p. 383. b Selvakumar et al. (2018). Definition based on fig. 1, p. 995.