Uhrovič Dalibor, Pantoja Camila, Kudlai Olena, Scholz Tomáš
Department of Zoology, Institute of Biology and Ecology, P. J. Šafárik University, Šrobárova 2, 041 54, Košice, Slovak Republic.
Institute of Parasitology, Biology Centre of the Czech Academy of Sciences, Branišovská 31, 370 05, České Budějovice, Czech Republic.
Sci Rep. 2025 Jul 1;15(1):20551. doi: 10.1038/s41598-025-02828-9.
The caryophyllidean tapeworms (Cestoda) of the genus Isoglaridacris Mackiewicz, 1965 are revised on the basis of the study of type specimens and newly collected material from suckers (Cypriniformes: Catostomidae) in North America. Molecular data reveal the presence of 14 lineages, each representing a separate species. An overview of all nominal species is provided, with updated information on their hosts, distribution and phylogenetic relationships. Isoglaridacris multivitellaria Amin, 1976 is excluded from Isoglaridacris, but its generic affiliation remains unclear, and it is considered incertae sedis. Homeomorpha mackiewiczi Dutton et Barger, 2014 from Minytrema melanops is transferred to Isoglaridacris as I. mackiewiczi (Dutton et Barger, 2014) new combination. Based on molecular and morphological data, four new species are described: Isoglaricris mattisi n. sp. from Moxostoma collapsum in South Carolina, USA, I. mcallisteri n. sp. from Erimyzon claviformis in Arkansas and Oklahoma, USA, I. mexicanus n. sp. from Moxostoma cf. austrinum in Chihuahua, Mexico, and I. floriani n. sp. from M. macrolepidotum in South Carolina. A key to the identification of all 16 valid species is provided. Isoglaridacris species exhibit strict host specificity, with most species parasitising only a single host species (strict specialists), while a few species occur in more than one species within the same host genus (congeneric specialists). The distribution range of Isoglaridacris species includes southern Canada, the United States and northwestern (nearctic) Mexico.
基于对模式标本以及从北美洲吸盘亚目鱼类（鲤形目：胭脂鱼科）新采集材料的研究，对1965年麦基维茨建立的异叶形绦虫属（扁形动物门：绦虫纲）进行了修订。分子数据显示存在14个谱系，每个谱系代表一个独立的物种。提供了所有已定名物种的概述，以及关于其宿主、分布和系统发育关系的更新信息。1976年命名的多卵黄异叶形绦虫被排除在异叶形绦虫属之外，但其分类归属仍不明确，暂归为未定分类地位。2014年来自黑斑小首绦虫的马氏同形绦虫被转移到异叶形绦虫属，成为异叶形绦虫属马氏种（达顿和巴杰，2014年）新组合。基于分子和形态学数据，描述了四个新物种：来自美国南卡罗来纳州塌陷铲颌鱼的马蒂斯异叶形绦虫新种、来自美国阿肯色州和俄克拉荷马州棒形埃氏鱼的麦卡利斯特异叶形绦虫新种、来自墨西哥奇瓦瓦州疑似南方铲颌鱼的墨西哥异叶形绦虫新种以及来自南卡罗来纳州大鳞铲颌鱼的弗洛里亚尼异叶形绦虫新种。提供了一份鉴定所有16个有效物种的检索表。异叶形绦虫属物种表现出严格的宿主特异性，大多数物种仅寄生于单一宿主物种（严格的专性寄生虫），而少数物种寄生于同一宿主属内的多个物种（同属专性寄生虫）。异叶形绦虫属物种的分布范围包括加拿大南部、美国和墨西哥西北部（新北界）。
