Description and Phylogenetic Relationships of Anhingatrema n. gen. (Digenea: Diplostomidae) with Two New Species from New World Anhingas (Aves: Anhingidae)

IF 1.2 3区农林科学 Q4 PARASITOLOGY

Acta Parasitologica Pub Date : 2022-12-02 DOI:10.1007/s11686-022-00643-0

Tyler J. Achatz, Clara A. Burkman, Alan Fecchio, Eric E. Pulis, Vasyl V. Tkach

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引用次数: 1

Abstract

Purpose

The Diplostomidae is a globally distributed family of digeneans that parasitize a wide variety of tetrapod definitive hosts. Recent molecular phylogenetic studies have revealed unknown diplostomid diversity in avian hosts throughout the New World. Herein, we provide descriptions of a novel genus of diplostomids with two new species.

Methods

Two species of diplostomids belonging to the new genus were collected from anhinga birds in Mississippi (USA) and Brazil. Partial nuclear 28S ribosomal and mitochondrial cox1 genes were sequenced. Ribosomal data were used for phylogenetic inference.

Results

Both species of Anhingatrema n. gen. were positioned in a 100% supported, monophyletic clade in the phylogenetic tree. The molecular phylogenetic position and a combination of morphological features (e.g., presence of pseudosuckers, testes shape and orientation) supported erection of the new genus. Anhingatrema overstreeti n. sp. and Anhingatrema cararai n. sp. are morphologically similar, but differ in size of and ratios associated with pseudosuckers. The two species differ by 2% of 28S sequences and 13.8% of cox1 sequences. Comparison of DNA sequences revealed that Diplostomidae gen. sp. in GenBank (MZ314151) is conspecific with An. overstreeti n. sp.

Conclusion

Anhingatrema n. gen. is the sixth genus of diplostomids known from anhingas worldwide. Anhingatrema cararai n. sp. is the first diplostomid to be reported from anhingas in South America. Combined with previous studies, the molecular phylogenies revealed at least two host switches to anhingas from other birds during the evolutionary history of the Diplostomidae.

Abstract Image

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Anhingatrema n.gen.（双孔目：双孔目）与新大陆Anhingas两新种（Aves:Anhingidae）的描述及系统发育关系

目的双口虫科是一个分布于全球的双口虫家族，寄生在各种各样的四足动物最终宿主中。最近的分子系统发育研究揭示了新大陆鸟类宿主中未知的双口虫多样性。在此，我们描述了一个新的双口虫属和两个新种。方法从美国密西西比州和巴西的安欣加鸟身上采集两种新属双口虫。对部分核28S核糖体和线粒体cox1基因进行测序。核糖体数据用于系统发育推断。结果在系统发育树中，Anhingatrema n.gen.的两个物种都位于一个100%支持的单系分支中。分子系统发育位置和形态学特征的组合（如假吸盘的存在、睾丸的形状和方向）支持了新属的建立。Anhingatrema oversteti n.sp.和Anhingatrea cararai n.sp.在形态上相似，但在假吸盘的大小和比例上不同。两个物种的28S序列相差2%，cox1序列相差13.8%。DNA序列比较表明，GenBank（MZ314151）中的Diplostomidae gen.sp.与An.overseti n.sp.同源。结论Anhingatrema n.gen.是世界范围内已知的第六属。卡氏Anhingatrema cararai n.sp.是南美洲首次报道的双口虫。结合之前的研究，分子系统发育揭示了在双口目的进化史上，至少有两种宿主从其他鸟类转变为安莺。

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来源期刊

Acta Parasitologica 医学-寄生虫学

CiteScore

3.10

自引率

6.70%

发文量

149

审稿时长

6-12 weeks

期刊介绍： Acta Parasitologica is an international journal covering the latest advances in the subject. Acta Parasitologica publishes original papers on all aspects of parasitology and host-parasite relationships, including the latest discoveries in biochemical and molecular biology of parasites, their physiology, morphology, taxonomy and ecology, as well as original research papers on immunology, pathology, and epidemiology of parasitic diseases in the context of medical, veterinary and biological sciences. The journal also publishes short research notes, invited review articles, book reviews. The journal was founded in 1953 as "Acta Parasitologica Polonica" by the Polish Parasitological Society and since 1954 has been published by W. Stefanski Institute of Parasitology of the Polish Academy of Sciences in Warsaw. Since 1992 in has appeared as Acta Parasitologica in four issues per year.