TABLE 1 in Descriptions of the immature stages of Microvelia pulchella Westwood, 1834 (Hemiptera: Heteroptera: Gerridae)
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TABLE 1. Microvelia pulchella, measurements obtained from five nymphs of each instar. All fourth instar nymphs measured would have become apterous adults if they reached this stage. Body length (BL), body width (BW), head length (HL), head width (HW), length of antennomeres I–IV (ANT I–IV), thorax length (TL), pronotum length (PL), pronotum width (PW), abdomen length (AL), abdomen width (AW), femur length (FEM), tibia length (TIB), tarsus length (TAR). StructureMin.1 st instar Mean±SDMax.Min.2 nd instar Mean±SDMax.Min.3 rd instar Mean±SDMax.Min.4 th instar Mean±SDMax.BL0.420.46 ± 0.060.580.490.50 ± 0.050.610.630.71 ± 0.070.800.901.12 ± 0.111.18BW0.300.33 ± 0.020.360.360.37 ± 0.020.420.480.50 ± 0.030.560.620.64 ± 0.030.70HL0.140.16 ± 0.010.170.200.20 ± 0.000.200.200.21 ± 0.010.240.300.30 ± 0.020.36HW0.220.22 ± 0.010.240.250.26 ± 0.010.280.280.32 ± 0.030.340.380.44 ± 0.030.46ANT I0.060.06 ± 0.010.080.050.07 ± 0.010.070.080.08 ± 0.010.100.100.13 ± 0.020.15ANT II0.060.07 ± 0.000.070.070.07 ± 0.000.070.080.10 ± 0.010.100.100.10 ± 0.000.10ANT III0.060.06 ± 0.010.070.070.07 ± 0.000.070.080.08 ± 0.010.090.080.12 ± 0.020.14ANT IV0.140.16 ± 0.010.160.140.15 ± 0.010.160.140.18 ± 0.020.210.210.26 ± 0.030.30TL0.120.13 ± 0.010.160.160.18 ± 0.020.220.200.22 ± 0.010.220.220.29 ± 0.040.34PL0.040.05 ± 0.010.060.040.05 ± 0.010.060.060.07 ± 0.010.080.080.10 ± 0.050.22PW0.250.26 ± 0.010.280.280.30 ± 0.010.320.340.40 ± 0.030.400.460.53 ± 0.050.56AL0.080.10 ± 0.050.210.090.14 ± 0.030.180.200.24 ± 0.010.240.220.34 ± 0.050.36AW0.220.24 ± 0.010.240.230.28 ± 0.020.300.300.30 ± 0.010.320.370.44 ± 0.080.60ForelegFEM0.100.13 ± 0.020.140.120.14 ± 0.010.150.180.20 ± 0.010.200.210.22 ± 0.070.30TIB0.100.11 ± 0.010.120.110.12 ± 0.010.140.120.16 ± 0.010.160.200.20 ± 0.040.30TAR0.090.10 ± 0.000.120.070.09 ± 0.010.110.100.11 ± 0.010.120.140.16 ± 0.010.18Middle legFEM0.120.14 ± 0.010.170.140.15 ± 0.010.160.200.21± 0.010.220.230.28 ± 0.050.36TIB0.140.14 ± 0.010.180.140.15 ± 0.010.160.160.18 ± 0.010.200.250.30 ± 0.040.36TAR0.110.12 ± 0.010.140.140.15 ± 0.010.150.140.16 ± 0.010.190.200.23 ± 0.020.26Hind legFEM0.140.17 ± 0.010.180.150.16 ± 0.010.180.200.22 ± 0.010.250.300.40 ± 0.070.46TIB0.170.20 ± 0.010.200.170.21 ± 0.020.230.230.26 ± 0.010.280.300.45 ± 0.070.50TAR0.120.13 ± 0.010.160.140.14 ± 0.020.150.150.16 ± 0.010.180.180.22 ± 0.020.23
