Table 1. Morphometrics for Characidium crandellii and C in Redescription of the Guiana Shield Darter Species Characidium crandellii and C. declivirostre (Crenuchidae) with Descriptions of Two New Species

Table 1. Morphometrics for Characidium crandellii and C. declivirostre (n ¼ 20 each).
Characidium crandelliiCharacidium declivirostreMeasurementAvg.SDMin.Max.Avg.SDMin.Max.Standard length (SL; mm)50.826.4106.950.240.758.7%SLHead length (HL)22.71.219.925.122.61.020.925.2Prepectoral distance18.01.415.221.618.91.317.221.6Prepelvic distance54.11.252.456.955.50.953.957.5Preanal distance75.01.172.976.678.41.076.980.6Anal–apex distance91.51.289.494.095.61.293.997.8Body width14.40.812.915.414.80.613.616.1Body depth at dorsal-fin origin15.51.512.717.616.11.713.419.1Body depth at anal-fin origin12.21.110.514.512.00.710.713.3Least caudal peduncle depth8.30.57.69.68.30.66.79.7First pectoral-fin ray length16.51.115.118.816.31.213.718.1Greatest pectoral fin distance30.01.627.733.832.51.729.136.3%HLSnout length32.62.528.739.236.02.132.939.3Snout-maxillary tip distance20.82.216.125.820.82.815.627.8Anterior nostril–orbit11.61.58.013.513.92.38.916.8Posterior nostril–orbit5.50.64.16.66.30.94.37.8Cheek depth17.22.414.123.018.43.811.025.4Orbital diameter24.23.317.528.324.52.318.727.0Interorbital distance24.42.321.630.921.72.317.327.2