TABLE 6 in The species diversity and phylogeny of the genus Siphlonurus Eaton, 1868 from China (Ephemeroptera: Siphlonuridae)

TABLE 6. Identification characteristics of male imago (Columns 1–5). CharacterBody length/mmColor pattern of wingsColor pattern of legsColor pattern of abdominal sternaposterolateral spines of abdominal segments VIII and IXSpeciesS. chankae16.0–18.0transparentcolor uniformlyinverted “u”- shaped markingsmallS. davidi13.0–16.0mode 1color uniformlyanterior and lateral margins darkersmallS. dongxi17.5mode 1ends of femur, tibia, and each tarsal segment noticeably darker, appearing browntwo pairs of dark brown spotssmallS. immanis20.5–22.0transparentcolor uniformlyinverted “u”- shaped markinglargeS. lacustris11.5–15.0transparentcolor uniformlyinverted “u”- shaped markingsmallS. orientalis16.0–18.0mode 1color uniformlya pair of unfused oblique stripessmallS. palaearcticus12.0–13.0mode 2color uniformlyinverted “u”- shaped markingsmallS. polyspineus13.0–15.0transparentcolor uniformlyinverted “u”- shaped markingsmallS. zhelochovtsevi14.0–17.0transparentcolor uniformlyinverted “u”- shaped markingsmall Notes: Mode 1: Forewing with dark brown crossveins and large dark brown spots between C and Rs 1; distal half of hindwing light brown, with a spot near middle of R1 and a brown stripe near forking point of MA. Mode 2: All crossveins of forewing dark brown, with dark brown stripes near middle of both forewing and hindwing.