Table 17. Morphometrics for Brachyhypopomus palenque, Brachyhypopomus provenzanoi, and Brachyhypopomus regani. HT, holotype; SD, standard deviation. Ranges for Brachyhypopomus palenque and Brachyhypopomus regani refer to the holotype and to paratype and non-type specimens from the type region. Ranges for Brachyhypopomus provenzanoi refer to the holotype and to paratype specimens from the type region.B. palenqueB. provenzanoiB. reganiHTRangeMeanSDnHTRangeMeanSDnHTRangeMeanSDnTotal length (TL) (mm)14983-20411835.1338768-109877.54112872-13811218.426Length to end of anal fin (LEA) (mm)13577-18410931.7337159-92736.34111563-1279816.330Head length (HL) (mm)14.69.6-19.212.03.1167.77.0-8.87.80.41613.49.2-16.813.71.932Proportion of TL (%)Caudal filament length (CF)9.44.2-12.49.11.93318.49.4-20.015.82.34110.210.1-15.212.61.820Proportion of LEA (%)Head length (HL)10.810.2-12.011.30.51610.89.6-11.910.70.61611.711.7-17.414.01.030Snout to occiput (SO)8.88.0-11.19.80.7168.37.8-9.48.60.4169.39.3-14.211.10.930Snout to anal-fin origin (SA)19.619.4-22.820.71.01618.418.2-21.019.60.81619.719.6-29.223.42.030Snout to pectoral-fin base (PP)11.110.9-13.212.40.61611.710.2-12.611.60.51613.613.6-20.015.91.230Longest pectoral-fin ray (PRL)3.63.2-5.24.10.5164.74.2-5.44.80.4165.05.0-8.56.50.630Anal fin length (AF)79.376.7-83.079.71.31681.771.8-82.680.02.71680.075.6-83.379.91.530Longest anal-fin ray (ARL)3.33.0-4.33.70.3163.92.4-4.13.50.5164.31.5-4.43.10.730Body depth at anal-fin origin (BD1)11.99.4-11.910.50.7168.56.7-9.67.90.81611.810.6-16.513.21.130Body width at anal-fin origin (BW1)7.96.0-7.96.60.4164.43.8-4.94.20.3166.54.4-7.46.50.630Body depth at anal-fin middle (BD2)10.58.6-11.710.20.7167.65.9-8.27.10.71611.59.0-12.310.60.830Body width at anal-fin middle (BW2)4.02.7-4.23.40.4162.61.9-3.62.60.5163.32.2-4.42.90.430Caudal filament length (CF)9.67.4-14.09.91.81222.517.4-24.419.82.31511.311.1-17.914.42.420Proportion of HL (%)Preorbital distance (PR)25.325.0-30.627.11.61624.723.1-26.724.51.11626.023.4-29.927.11.532Mouth width (MW)28.125.1-37.830.93.91629.921.4-29.925.62.21623.014.9-27.019.22.432Internarial distance (AE)22.618.7-23.121.41.31619.817.8-21.920.11.31619.116.5-21.218.61.132Posterior naris to eye (PE)5.84.5-10.17.01.4166.63.9-6.65.40.8167.64.8-8.36.80.832Orbital diameter (OD)9.37.8-11.79.81.11612.510.2-14.312.21.01610.39.5-13.011.10.932Interorbital distance (IO)30.125.0-30.428.02.01621.217.8-22.420.11.51619.715.0-21.118.01.732Head depth at eye (HD1)48.244.5-50.546.91.91643.838.3-44.641.21.81642.340.0-47.443.31.732Head width at eye (HW1)38.937.5-49.943.13.51639.628.8-39.634.22.91636.830.4-41.834.93.032Head depth at occiput (HD2)80.465.6-80.473.03.51662.558.0-67.864.82.31671.661.3-73.767.62.532Head width at occiput (HW2)55.752.5-63.356.72.51648.838.9-48.844.62.81657.539.1-58.250.54.232Postorbital distance (PO)63.761.9-68.564.72.01661.860.1-67.563.32.01664.960.4-67.465.01.432Branchial aperture (BO)33.924.4-33.929.43.21618.714.1-21.017.31.91624.619.0-26.623.42.032Pectoral-fin base (PB)17.912.8-17.914.81.4168.36.8-10.98.91.21611.29.3-13.411.71.032Caudal filament depth (CD)20.315.1-21.318.11.81214.913.0-19.114.31.51615.58.1-15.511.91.630Caudal filament width (CW)6.03.8-7.55.81.2127.34.6-7.35.60.8163.83.0-6.14.10.730Other proportionsBW1 (% of BD1)66.356.8-67.563.13.11652.248.4-57.153.33.01654.741.3-54.749.13.932BW2 (% of BD2)37.729.9-37.733.32.31634.128.4-44.435.64.31629.022.2-38.127.83.532