Table 21 in A taxonomic revision of the Neotropical electric fish genus Brachyhypopomus (Ostariophysi: Gymnotiformes: Hypopomidae), with descriptions of 15 new species

Table 21. Morphometrics for Brachyhypopomus walteri. HT, holotype; SD, standard deviation; dr., drainage. Data for holotype (nr. Manaus, Amazonas, Brazil) from Sullivan et al. (2013). Range for type region (Central Amazonas drainage) refers to non-type specimens from the vicinity of Tefé, Amazonas, Brazil. Specimens from the Upper rio Paraguay drainage are from Mato Grosso and Mato Grosso do Sul, Brazil. Central Amazonas dr. (type region)Upper Paraguay drainageHTRangeMeanSDnRangeMeanSDnTotal length (TL) (mm)16375-18012724.886106-15412816.614Length to end of anal fin (LEA) (mm)12655-1319216.88672-1068712.015Head length (HL) (mm)14.49.0-16.011.72.2308.5-11.910.01.015Proportion of TL (%)Caudal filament length (CF)22.718.2-35.027.53.68629.0-36.132.61.914Proportion of LEA (%)Head length (HL)11.410.9-13.812.10.82910.2-12.211.40.615Snout to occiput (SO)8.58.9-11.89.90.6297.8-11.49.41.015Snout to anal-fin origin (SA)19.917.8-26.620.52.02914.7-18.916.71.215Snout to pectoral-fin base (PP)12.7-15.213.70.7299.7-14.012.81.215Longest pectoral-fin ray (PRL)5.44.5-7.76.50.7294.9-6.55.70.515Anal fin length (AF)75.0-83.280.32.12780.8-85.983.61.615Longest anal-fin ray (ARL)4.61.3-3.52.10.5283.1-5.24.10.515Body depth at anal-fin origin (BD1)9.2-15.212.51.6299.3-12.210.60.815Body width at anal-fin origin (BW1)3.9-7.05.70.7294.5-5.65.20.415Body depth at anal-fin middle (BD2)6.6-11.28.90.9276.7-9.48.30.715Body width at anal-fin middle (BW2)1.6-2.92.20.3271.6-3.32.40.415Caudal filament length (CF)29.427.9-52.838.86.41840.8-56.448.64.114Proportion of HL (%)Preorbital distance (PR)28.523.3-27.125.41.13020.3-31.623.72.615Mouth width (MW)22.917.1-23.320.81.63022.9-32.228.72.715Internarial distance (AE)17.5-22.219.71.23017.7-21.219.41.015Posterior naris to eye (PE)3.42.0-5.03.40.9302.3-4.93.80.715Orbital diameter (OD)12.511.0-16.313.81.53012.0-15.613.91.215Interorbital distance (IO)23.918.8-24.421.81.43021.5-27.624.32.215Head depth at eye (HD1)44.4-53.249.72.03045.2-51.748.91.715Head width at eye (HW1)42.228.9-42.935.93.43033.3-46.039.13.515Head depth at occiput (HD2)79.067.1-84.776.33.73072.9-84.478.33.415Head width at occiput (HW2)46.2-60.552.24.13047.3-57.152.62.615Postorbital distance (PO)60.0-67.163.31.63060.4-68.065.12.215Branchial aperture (BO)29.716.3-35.426.34.33019.0-30.322.62.915Pectoral-fin base (PB)10.3-15.613.41.43010.3-14.111.61.115Caudal filament depth (CD)23.27.9-19.014.62.42910.3-16.612.91.915Caudal filament width (CW)3.3-6.74.60.9294.3-7.06.00.815Other proportionsBW1 (% of BD1)39.7-52.546.13.43042.3-53.248.62.915BW2 (% of BD2)18.9-28.124.12.12719.0-34.528.73.715表21。沃尔特短背电鳗（Brachyhypopomus walteri）形态测量数据。HT为正模标本（holotype），SD为标准差（standard deviation），dr.为流域（drainage）。正模标本（采自巴西亚马孙州马瑙斯）的数据来自Sullivan等人（2013）的研究。模式区域（中亚马孙流域）的测量范围指巴西亚马孙州特菲（Tefé）附近的非正模标本。巴拉圭河上游流域的标本采自巴西马托格罗索州与南马托格罗索州。 ### 形态测量指标详情 | 测量指标 | 中亚马孙流域（模式区域） | | | | | 巴拉圭河上游流域 | | | | | | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | :---: | | | 正模 | 范围 | 均值 | 标准差 | 样本量 | 范围 | 均值 | 标准差 | 样本量 | | 总长度（Total length, TL）(mm) | 163 | 75-180 | 127 | 24.8 | 86 | 106-154 | 128 | 16.6 | 14 | | 臀鳍末端体长（Length to end of anal fin, LEA）(mm) | 126 | 55-131 | 92 | 16.8 | 86 | 72-106 | 87 | 12.0 | 15 | | 头长（Head length, HL）(mm) | 14.4 | 9.0-16.0 | 11.7 | 2.2 | 30 | 8.5-11.9 | 10.0 | 1.0 | 15 | | **占总长度比例(%)** | | | | | | | | | | | | 尾丝长度（Caudal filament length, CF） | 22.7 | 18.2-35.0 | 27.5 | 3.6 | 86 | 29.0-36.1 | 32.6 | 1.9 | 14 | | **占臀鳍末端体长比例(%)** | | | | | | | | | | | | 头长（Head length, HL） | 11.4 | 10.9-13.8 | 12.1 | 0.8 | 29 | 10.2-12.2 | 11.4 | 0.6 | 15 | | 吻至枕部（Snout to occiput, SO） | 8.5 | 8.9-11.8 | 9.9 | 0.6 | 29 | 7.8-11.4 | 9.4 | 1.0 | 15 | | 吻至臀鳍起点（Snout to anal-fin origin, SA） | 19.9 | 17.8-26.6 | 20.5 | 2.0 | 29 | 14.7-18.9 | 16.7 | 1.2 | 15 | | 吻至胸鳍基部（Snout to pectoral-fin base, PP） | - | 12.7-15.2 | 13.7 | 0.7 | 29 | 9.7-14.0 | 12.8 | 1.2 | 15 | | 最长胸鳍鳍条（Longest pectoral-fin ray, PRL）(mm) | - | 4.5-7.7 | 6.5 | 0.7 | 29 | 4.9-6.5 | 5.7 | 0.5 | 15 | | 臀鳍长度（Anal fin length, AF）(%) | - | 75.0-83.2 | 80.3 | 2.1 | 27 | 80.8-85.9 | 83.6 | 1.6 | 15 | | 最长臀鳍鳍条（Longest anal-fin ray, ARL）(mm) | - | 1.3-3.5 | 2.1 | 0.5 | 28 | 3.1-5.2 | 4.1 | 0.5 | 15 | | 臀鳍起点处体高（Body depth at anal-fin origin, BD1）(mm) | - | 9.2-15.2 | 12.5 | 1.6 | 29 | 9.3-12.2 | 10.6 | 0.8 | 15 | | 臀鳍起点处体宽（Body width at anal-fin origin, BW1）(mm) | - | 3.9-7.0 | 5.7 | 0.7 | 29 | 4.5-5.6 | 5.2 | 0.4 | 15 | | 臀鳍中部体高（Body depth at anal-fin middle, BD2）(mm) | - | 6.6-11.2 | 8.9 | 0.9 | 27 | 6.7-9.4 | 8.3 | 0.7 | 15 | | 臀鳍中部体宽（Body width at anal-fin middle, BW2）(mm) | - | 1.6-2.9 | 2.2 | 0.3 | 27 | 1.6-3.3 | 2.4 | 0.4 | 15 | | 尾丝长度（Caudal filament length, CF）(mm) | 29.4 | 27.9-52.8 | 38.8 | 6.4 | 18 | 40.8-56.4 | 48.6 | 4.1 | 14 | | **占头长比例(%)** | | | | | | | | | | | | 眶前距离（Preorbital distance, PR） | 28.5 | 23.3-27.1 | 25.4 | 1.1 | 30 | 20.3-31.6 | 23.7 | 2.6 | 15 | | 口宽（Mouth width, MW） | 22.9 | 17.1-23.3 | 20.8 | 1.6 | 30 | 22.9-32.2 | 28.7 | 2.7 | 15 | | 鼻间距（Internarial distance, AE） | - | 17.5-22.2 | 19.7 | 1.2 | 30 | 17.7-21.2 | 19.4 | 1.0 | 15 | | 后鼻孔至眼（Posterior naris to eye, PE） | 3.4 | 2.0-5.0 | 3.4 | 0.9 | 30 | 2.3-4.9 | 3.8 | 0.7 | 15 | | 眼径（Orbital diameter, OD） | 12.5 | 11.0-16.3 | 13.8 | 1.5 | 30 | 12.0-15.6 | 13.9 | 1.2 | 15 | | 眼间距（Interorbital distance, IO） | 23.9 | 18.8-24.4 | 21.8 | 1.4 | 30 | 21.5-27.6 | 24.3 | 2.2 | 15 | | 眼处头高（Head depth at eye, HD1） | 44.4 | 45.2-53.2 | 49.7 | 2.0 | 30 | 45.2-51.7 | 48.9 | 1.7 | 15 | | 眼处头宽（Head width at eye, HW1） | 42.2 | 28.9-42.9 | 35.9 | 3.4 | 30 | 33.3-46.0 | 39.1 | 3.5 | 15 | | 枕部头高（Head depth at occiput, HD2） | 79.0 | 67.1-84.7 | 76.3 | 3.7 | 30 | 72.9-84.4 | 78.3 | 3.4 | 15 | | 枕部头宽（Head width at occiput, HW2） | - | 46.2-60.5 | 52.2 | 4.1 | 30 | 47.3-57.1 | 52.6 | 2.6 | 15 | | 眶后距离（Postorbital distance, PO） | 60.0 | 60.0-67.1 | 63.3 | 1.6 | 30 | 60.4-68.0 | 65.1 | 2.2 | 15 | | 鳃裂宽（Branchial aperture, BO） | 29.7 | 16.3-35.4 | 26.3 | 4.3 | 30 | 19.0-30.3 | 22.6 | 2.9 | 15 | | 胸鳍基长（Pectoral-fin base, PB） | 10.3 | 10.3-15.6 | 13.4 | 1.4 | 30 | 10.3-14.1 | 11.6 | 1.1 | 15 | | 尾丝高（Caudal filament depth, CD）(mm) | 23.2 | 7.9-19.0 | 14.6 | 2.4 | 29 | 10.3-16.6 | 12.9 | 1.9 | 15 | | 尾丝宽（Caudal filament width, CW）(mm) | - | 3.3-6.7 | 4.6 | 0.9 | 29 | 4.3-7.0 | 6.0 | 0.8 | 15 | | **其他比例(%)** | | | | | | | | | | | | 臀鳍起点处体宽占该点体高比例（BW1 % of BD1） | 39.7 | 39.7-52.5 | 46.1 | 3.4 | 30 | 42.3-53.2 | 48.6 | 2.9 | 15 | | 臀鳍中部体宽占该部体高比例（BW2 % of BD2） | 18.9 | 18.9-28.1 | 24.1 | 2.1 | 27 | 19.0-34.5 | 28.7 | 3.7 | 15 |