Tab. 2. Descriptive morphometrics of Eurycheilichthys species. Values are given as percents of standard length or of head length. Hol = holotype. SD = standard deviation. Data in bold are distinguishing features among species.CharacterE. luisae n=30E. paucidens n=23E. planus n=17E. vacariensis n=23HolLowHighMeanHolLowHighMeanHolLowHighMeanHolLowHighMeanStandard length (mm)42.537.147.741.261.837.061.849.149.341.456.646.947.632.947.640.0Percents of SLHead length35.633.438.336.330.429.437.533.332.631.135.833.233.630.537.834.6Predorsal length48.044.449.647.442.340.348.643.045.242.448.545.045.042.650.446.0Dorsal-fin spine length24.520.125.423.118.818.122.921.119.916.521.619.120.620.123.721.8First anal-fin ray length17.216.320.518.618.518.222.219.815.713.917.015.416.114.519.317.4Pectoral-fin spine length26.923.830.927.320.520.527.123.624.319.326.923.824.522.027.324.8First pelvic-fin ray length22.617.224.121.419.919.424.221.518.315.619.217.318.714.620.118.0Trunk length14.013.616.214.614.213.015.914.517.914.318.516.413.912.116.013.9Abdominal length23.921.626.323.626.421.726.424.123.419.924.322.222.519.524.022.1Cleithral width31.628.634.031.325.125.130.327.428.526.629.428.126.725.729.527.4Body depth at dorsal fin15.915.219.717.014.614.018.216.015.813.416.014.815.514.217.515.8Body width at anal fin13.413.215.414.212.511.614.512.613.312.514.613.213.211.216.213.2Caudal peduncle length32.923.632.928.934.127.236.832.332.428.235.730.933.325.933.730.1Caudal peduncle depth11.110.112.511.29.28.511.19.99.78.910.09.510.79.711.410.5Percents of HLSnout length52.149.756.252.555.051.259.454.253.948.154.852.154.950.958.953.4Orbital diameter14.412.114.513.410.39.312.410.614.012.414.913.813.912.516.914.3Interorbital width36.832.038.935.731.430.035.733.040.833.940.837.539.433.939.936.9Head depth48.642.848.645.843.140.347.243.846.541.646.944.147.544.753.848.1Left mandibular ramus12.611.114.713.09.17.010.89.212.39.815.912.314.210.215.612.2