Table 3 in Megabranchiella gen. nov., a new mayfly genus (Ephemeroptera, Baetidae) from Thailand with description of two new species

Table 3. Larval character comparisons of two new species of Megabranchiella gen. nov.
CharactersM. scutulata sp. nov.M. longusa sp. nov.Hindwing padsHighly reducedHighly reducedFemurDorsal marginRegular row of long, apically rounded, simple setaeRegular row of dense long, robust, apically pointed, pectinate setaeNumber of dorsal setae11-1318-20Dorsal surfacewith scattered tiny spines and some long, apically blunt, fine, hair-like setaewith scattered tiny spines and dense long, apically blunt, fine, hair-like setaeTibiaDorsal marginA regular row of long, apically pointed, pectinate setaeA regular row of long, apically pointed, pectinate setaeAbdominal gillsGill IEnlarged to covered abdominal sternites II-V, oriented ventrally, relatively rhombus shape, gill margin smoothEnlarged to covered abdominal sternites II-V, oriented ventrally, relatively rhombus shape, gill margin smoothLength/width gill I1.4 ×2.5 ×Gill II-VIIOriented dorsally, slightly oval, gill margin smooth, surface and gill margin covered with scattered long, fine hair-like setaeOriented dorsally, slightly oval and slender, gill margin smooth, surface and gill margin covered with scattered long, fine hair-like setaeLength/width gill II-VII2.1 ×3.3 ×Gonostyli budAcentrella -type, 3-segmentedAcentrella -type, 3-segmented,Terminal filamentParacercusReduced to several segments; approximately 0.4 × cerci lengthReduced to several segments; approximately 0.3 × cerci lengthDistributionNorthern Thailand (Chiang Mai and Chiang Rai Provinces)Northern Thailand (Chiang Mai and Nan Provinces)