Royal Museum for Central Africa, Vertebrate Section, Ichthyology, Leuvensesteenweg 13, 3080 Tervuren, Belgium.
J Fish Biol. 2009 Oct;75(5):1018-47. doi: 10.1111/j.1095-8649.2009.02375.x.
A detailed morphometric study of 123 specimens identified as Mastacembelus albomaculatus and the six syntypes of M. tanganicae was undertaken. On each specimen, 27 morphometric measurements and 12 meristics were taken. The type series of M. tanganicae contains more than one species, with four specimens attributed to a new species M. reygeli sp. nov. A redescription of M. albomaculatus and a description of the new species are provided. Both species are endemic to the northern and central part of Lake Tanganyika. They can be distinguished based on the number of caudal vertebrae [47-52 (median 49) in M. albomaculatus v. 42-46 (44) in M. reygeli sp. nov.], the total number of vertebrae [85-90 (88) v. 78-83 (81)] and the distance from the snout to the last externally visible dorsal spine (S-LDS) [61.8-67.0 (mean 64.0) v. 66.6-71.5 (68.6)% L(S)]. In addition, intermediate specimens and populations between M. albomaculatus and M. reygeli were discovered from several parts of the lake, but mainly from the southern part. The latter intermediate populations were provisionally identified as introgressed populations.
对 123 个被鉴定为白头鳗鲡和 6 个塔干加湖鳗鲡模式标本的详细形态测量学研究进行了研究。对每个标本进行了 27 项形态测量和 12 项可数性状的测量。塔干加湖鳗鲡的模式系列包含不止一个物种，其中 4 个标本被归为一个新种——雷氏鳗鲡。对白头鳗鲡进行了重新描述，并对新种进行了描述。这两个物种都分布在坦噶尼喀湖的北部和中部。它们可以根据尾椎骨的数量（白头鳗鲡为 47-52 个（中位数 49），而雷氏鳗鲡为 42-46 个（44））、总椎骨数（白头鳗鲡为 85-90 个（88），而雷氏鳗鲡为 78-83 个（81））以及从吻端到最后可见的外部背刺的距离（S-LDS）[白头鳗鲡为 61.8-67.0（平均 64.0），而雷氏鳗鲡为 66.6-71.5（68.6）% L（S）]来区分。此外，在湖的几个地区发现了白头鳗鲡和雷氏鳗鲡之间的中间标本和群体，但主要是在南部地区。这些后者中间种群被暂时鉴定为杂交种群。
