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Table 2 Definition of characters and their states

From: New data from the Middle Jurassic of China shed light on the phylogeny and origin of the proboscis in the Mesopsychidae (Insecta: Mecoptera)

No. Characters and their states
0 The relative level between Sc ending (Sc2) at C and CuA ending at posterior margin in the forewing: 0 – Sc ending far proximal to CuA ending; 1 – Sc ending at the same level with or slightly distal or proximal to CuA ending; 2 – Sc ending far distal from CuA ending.
1 The relative level of Sc fore-branch (Sc1) ending point vs. 1A ending point in the forewing: 0 – Sc1 ending point distal to 1A ending point; 1 – Sc1 terminus point very close or at the same level with 1A ending point; 2 – Sc1 ending point proximal to 1A terminus.
2 Presence of Sc1, branches of Sc2 and crossvein sc-r in forewing: 0 – with one Sc2 branch and one sc-r; 1 – with two Sc2 branches and one sc-r; 2 – no fore-branch (Sc1) and/or no sc-r.
3 The relative level between the point of MP origination from CuA and the point of RS + MA forking from R1 in the forewing: 0 – RS + MA forking from R1 slightly distal to MP forking from CuA; 1 – RS + MA forking from R1 far distal to MP forking from CuA.
4 The relative level between RS and MA forking points in the forewing: 0 – MA forking proximal to the RS forking; 1 – RS and MA forking points very close or at the same level; 2 – MA forking distal to the RS forking.
5 The relative level between MA and MP1 + 2 forking points in the forewing: 0 – MP1 + 2 (or MP1 + 2 + 3 + 4 in outgroup1 and outgroup 2) forking distal to the MA forking; 1 – MP1 + 2 forking very close to the MA forking; 2 – MP1 + 2 forking proximal to the MA forking.
6 Number of crossveins between R1 and C: 0 – no crossveins; 1 – 1 crossvein; 2 – 2 crossveins.
7 Presence of the crossvein r1-rs in the forewing: 0 – present; 1 – absent.
8 Number of RS branches in the forewing: 0 – 3 branches; 1 – 2 branches.
9 Number of MP branches in the forewing: 0 – >5 branches; 1 – 5 branches; 2 – 4 branches.
10 The relative level of MP forking point and RS + MA forking point in the forewing: 0 – MP forking proximal to the RS + MA forking; 1 – MP forking and RS + MA forking are very close or at the same level; 2 – MP forking distal to the RS + MA forking.
11 Posterior margin of forewings emarginated at the CuP vein apex: 0 –absent; 1 – present.
12 The inclination of the cup-cua (or cup-mp or CuA base) in the forewing: 0 – forming <90°angle with CuA; 1 – 90°or almost 90°angle with CuA; 2 – forming >90°angle with CuA.
13 The relative level of cup-cua (or cup-mp or CuA base) vs. MP origination from CuA in the forewing: 0 – cup-cua far distal to MP origination from CuA; 1 – cup-cua very close or slightly distal to MP origination from CuA; 2 – cup-cua proximal to MP origination from CuA.
14 The relative level of CuP and mid-length of the wing in the forewing: 0 – CuP proximal to mid-length of the wing; 1 – CuP almost at the same level or distal to mid-length of the wing.
15 The relative level of 2A ending vs. MP origination from CuA in the forewing: 0 –2A proximal to MP origination from CuA; 1 – 2A almost at the same level or distal to MP origination from CuA.
16 Symmetric spots on both wings: 0 – absent; 1 – present.
17 The relative level of crossvein rs2-ma (rs2-ma1 or rs-ma1) vs. MA1 + 2 forking point in the forewing: 0 – crossvein rs2-ma1 (rs-ma1) distal to MA1 + 2 forking point; 1 – crossvein rs2-ma proximal to MA1 + 2 forking point.
18 The relative level of crossvein rs2-ma (rs2-ma1 or rs-ma1 or rs3-ma1 for outgroup 2) vs. RS1 + 2 forking point in the forewing: 0 – crossvein rs2-ma (rs2-ma1 or rs3-ma1 for outgroup 2) distal to RS1 + 2 (RS1 + 2 + 3 for outgroup 2) forking point; 1 – crossvein rs-ma1 proximal to RS1 + 2 forking point.
19 The relative level of crossvein ma-mp1 + 2 vs. MA1 + 2 forking point in the forewing: 0 – crossvein ma-mp1 + 2 slightly distal to MA1 + 2 forking point; 1 – crossvein ma-mp1 + 2 slightly proximal to MA1 + 2 forking point; 2 – crossvein ma-mp1 + 2 far proximal to MA1 + 2 forking point.
20 The relative level of crossvein mp2-mp3 (mp1 + 2-mp3 or mp2 + 3-mp4) vs. MP1 + 2 (or MP 1 + 2 + 3) forking point in the forewing: 0 – crossvein mp1 + 2-mp3 proximal to MP1 + 2 forking point; 1 – crossvein mp2-mp3 slightly distal to MP1 + 2 forking point; 2 – crossvein mp2-mp3 much distal to MP1 + 2 forking point.
21 Number of crossveins (excluding sc-c, a1-a2 and a2-a3) in the forewing: 0 – > 10 crossveins; 1 – 8 – 10 crossveins; 2 – < 8 crossveins.
22 The anal area in the forewing: 0 –narrow; 1 – medium; 2 – expanded.
23 Length of Sc in the hind wing: 0 – short (proximal to MA bifurcation); 1 – medium (slightly proximal to MA bifurcation); 2 – long (distal to MA bifurcation).
24 Antennae: 0 – filiform and long antennae; 1 – short and filiform-like antennae; 2 – pectinate (comb-like) antennae.
25 Mouthparts: 0 – siphonate mouthparts not present; 1 – siphonate mouthparts present.