In an ongoing investigation on the helminths of amphibians in southeastern Mexico, specimens of 2 undescribed species of Haematoloechus were collected from Rana brownorum. Haematoloechus ceciliae n. sp. is morphologically most similar to Haematoloechus meridionalis, but differs in the shape of the oral sucker, in the nature of the acetabulum, and in the distribution of the glandular cells in the pharyngeal region; Haematoloechus celestunensis n. sp. closely resembles Haematoloechus floedae, but differs in the form and size of the testes and measurements of acetabulum. COI and 28S DNA sequences of both new species show high divergence compared to other species of the genus. In the phylogenetic trees, H. ceciliae appears most closely related to Haematoloechus danbrooksi and H. celestunensis to Haematoloechus veracruzanus.

中文翻译：

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Haematoloechus 的两个新种（Digenea：Plagiorchidae）寄生于墨西哥东南部的棕蛙（两栖类：Ranidae）。

在对墨西哥东南部两栖动物蠕虫的持续调查中，从棕蛙中收集了 2 种未描述的 Haematoloechus 物种的标本。Haematoloechus ceciliae n. sp. 在形态学上与 Haematoloechus meridionalis 最相似，但在口腔吸盘的形状、髋臼的性质和咽部腺细胞的分布方面有所不同；Haematoloechus celestunensis n. sp. 与 Haematoloechus floedae 非常相似，但在睾丸的形式和大小以及髋臼的测量方面有所不同。与该属的其他物种相比，这两个新物种的 COI 和 28S DNA 序列显示出很高的差异。在系统发育树中，H. ceciliae 似乎与 Haematoloechus danbrooksi 和 H. celestunensis 与 Haematoloechus veracruzanus 的关系最密切。