Table 2 in Two new species of Centroptilum Eaton, 1869 from North Africa (Ephemeroptera, Baetidae)

Table 2. Differentiating characters of new species of Centroptilum and C. luteolum (Switzerland, VD, Le Chenit, 18 Aug 2001, leg. A. Wagner) (M: 11B and M: 11F refer to figures in Martynov et al. 2022: fig. 11B, F).
CharactersNo. in Martynov et al. 2022C. luteolumFigsC. samraouii sp. nov.FigsC. alamiae sp. nov.FigsLarvaHead, mouthpartsLabrum, width/length ratioII.11.4-1.6ca. 1.61aca. 1.57aLabrum, anterior marginII.3nearly straight, medial emargination angularnearly straight, medial emargination angular1aslightly concave, medial emargination angular7aMaxillary palp, segment IIIII.5(bluntly) pointed apexpointed apex1gbluntly pointed/rounded apex7gca. 1.2 × as long as segment IIca. 1.3 × as long as segment IIca. 1.6 × as long as segment IIMaxillary palp, lengthca. 1.8 × as long as galea-laciniaca. 1.9 × as long as galea-lacinia1gca. 1.7 × as long as galea-lacinia7gRhight mandible, denticlesII.63 + 23 + 21b3 + 27bLeft mandible, denticlesII.74 + 2 (rarely 4 + 3)4 + 31d4 + 37dLabial palp segment IIIII.12Distal (inner) margin concaveDistal (inner) margin concave1jDistal (inner) margin slightly concave7kThorax, legsLegs, colour patternIII.4femur with brown band distally; tibia proximally darkerlegs light brown; claw darker3bfemur distomedially darker, tarsus basally and distally darker; claw basally darker9a-cFore femur, dorsal marginIII.6occasional short, pointed setae on marginoccasional short, pointed setae on margin2aoccasional short, pointed setae on margin; row of short, pointed, setae near margin8aFore tibia, length vs. tarsusca. equal lengthslightly longer (ca. 1.1 ×)2aca. equal length7aAbdomenTerga, posterior margin (spines)IV.5, 6I: no spinesI: no spinesI: no spinesII-IX: long, narrow triangular, pointed4c, fII-III: small triangular4a, dII-VI (VII): small triangular4b, e5cIV-IX: medium triangular5aVII-IX: medium triangular5bTerga VII-IX, posterolateral partIV.7VII: no spinesVII: no spinesVII: no spinesVIII: ca. 3 spinesVIII: ca. 5 spinesVIII: ca. 4 spinesIX: 10-13 spinesIX: ca. 8 spinesIX: ca. 12 spinesSterna, posterior margin (spines)IV.10I-IV: no spinesI-VI: no spinesI-V: no spinesV: rudimentary spinesVII-IX: very small triangularVI: rudimentaryVI-IX: medium triangularVII-IX: very small triangularParaproct, distal marginIV.1423-30 pointed spinesM: 11B17-23 pointed spines2j30-45 pointed spines7jplus some spines in 2nd rowplus few smaller in 2nd rowpartly split tipsplus few in 2nd rowCaudalii, posterior margin of segments (spines)IV.17elongated, triangular spinesM: 11Felongated, triangular spines2ktriangular spines with8kwith long pointsshort points