Two specimens of Micromyzon akamai, an eyeless and miniaturized species previously known only from deep channels of the eastern Amazon Basin in Brazil, are reported from the Curaray River, a tributary of the Napo River in Ecuador. The new specimens are the first records of Micromyzon in headwaters of the Amazon River and the first records of M. akamai outside Brazil. External morphological characters and a phylogenetic analysis of the cytochrome c oxidase I (COI) gene support identification of the new specimens as Micromyzon akamai. However, the new specimens also indicate that some features previously hypothesized to be apomorphic for Micromyzon akamai are intraspecifically variable. This article is protected by copyright. All rights reserved.

中文翻译：

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厄瓜多尔无眼班卓鲶鱼 Micromyzon akamai (Siluriformes: Aspredinidae) 的新记录扩大了物种范围并揭示了种内形态变异

据报道，来自厄瓜多尔纳波河支流库拉雷河的两个 Micromyzon akamai 标本是一种无眼的小型化物种，以前仅在巴西亚马逊盆地东部的深水河道中被发现。新标本是亚马逊河源头 Micromyzon 的第一个记录，也是巴西以外的 M. akamai 的第一个记录。外部形态特征和细胞色素 c 氧化酶 I (COI) 基因的系统发育分析支持将新标本鉴定为 Micromyzon akamai。然而，新标本还表明，以前假设为 Micromyzon akamai 的一些特征是种内可变的。本文受版权保护。版权所有。