Characterization of new 'white grub' parasites (Posthodiplostomum spp.) (Trematoda: Diplostomidae) in Georgia, USA, with descriptions of two new species and remarks on P. nanum Dubois, 1937.

IF 1.2 4区医学 Q4 PARASITOLOGY

Systematic Parasitology Pub Date : 2025-05-02 DOI:10.1007/s11230-025-10233-z

Tyler J Achatz, Zoe S Von Holten, Jonathon Pritchard, Matthew Keel

{"title":"Characterization of new 'white grub' parasites (Posthodiplostomum spp.) (Trematoda: Diplostomidae) in Georgia, USA, with descriptions of two new species and remarks on P. nanum Dubois, 1937.","authors":"Tyler J Achatz, Zoe S Von Holten, Jonathon Pritchard, Matthew Keel","doi":"10.1007/s11230-025-10233-z","DOIUrl":null,"url":null,"abstract":"<p><p>Posthodiplostomum Dubois, 1936 is a diverse, widespread genus of diplostomoideans that parasitize as adults the intestines of piscivorous birds. Larvae of Posthodiplostomum spp. commonly cause the 'white grub' disease of fishes. During July 2024, we collected Posthodiplostomum spp. from green heron Butorides virescens and great egret Ardea alba in Georgia, USA, including two new species. We provide descriptions of both new species in the present study. Partial nuclear 28S rDNA and mitochondrial cox1 gene DNA sequences were generated for all collected species; newly obtained 28S sequences were used to study the phylogenetic interrelationships among Posthodiplostomum spp. The new species have a subspherical prosoma that is characteristic in only a few other species, notably Posthodiplostomum aztlanensis and Posthodiplostomum nanum which parasitize the same avian host species. Despite minimal morphological differences among Posthodiplostomum seminolense n. sp., Posthodiplostomum dawnsherryae n. sp., P. aztlanensis and P. nanum, these morphologically similar species differ by 0.5-5.9% in partial 28S sequences and 10.9-17.4% in partial cox1 sequences. The original description of P. nanum was based on immature specimens; we provide a new description of P. nanum based on previously sequenced specimens from a great egret in Mississippi, USA to allow better comparisons.</p>","PeriodicalId":54436,"journal":{"name":"Systematic Parasitology","volume":"102 3","pages":"33"},"PeriodicalIF":1.2000,"publicationDate":"2025-05-02","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"0","resultStr":null,"platform":"Semanticscholar","paperid":null,"PeriodicalName":"Systematic Parasitology","FirstCategoryId":"3","ListUrlMain":"https://doi.org/10.1007/s11230-025-10233-z","RegionNum":4,"RegionCategory":"医学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"Q4","JCRName":"PARASITOLOGY","Score":null,"Total":0}

引用次数: 0

Abstract

Posthodiplostomum Dubois, 1936 is a diverse, widespread genus of diplostomoideans that parasitize as adults the intestines of piscivorous birds. Larvae of Posthodiplostomum spp. commonly cause the 'white grub' disease of fishes. During July 2024, we collected Posthodiplostomum spp. from green heron Butorides virescens and great egret Ardea alba in Georgia, USA, including two new species. We provide descriptions of both new species in the present study. Partial nuclear 28S rDNA and mitochondrial cox1 gene DNA sequences were generated for all collected species; newly obtained 28S sequences were used to study the phylogenetic interrelationships among Posthodiplostomum spp. The new species have a subspherical prosoma that is characteristic in only a few other species, notably Posthodiplostomum aztlanensis and Posthodiplostomum nanum which parasitize the same avian host species. Despite minimal morphological differences among Posthodiplostomum seminolense n. sp., Posthodiplostomum dawnsherryae n. sp., P. aztlanensis and P. nanum, these morphologically similar species differ by 0.5-5.9% in partial 28S sequences and 10.9-17.4% in partial cox1 sequences. The original description of P. nanum was based on immature specimens; we provide a new description of P. nanum based on previously sequenced specimens from a great egret in Mississippi, USA to allow better comparisons.

查看原文本刊更多论文

美国乔治亚州新“白蛴螬”寄生虫（pothodiplostomum spp.）（吸虫目：双虫科）的鉴定，附两新种描述及对P. nanum Dubois的评述，1937。

diplostomum Dubois， 1936是一种分布广泛的diplostomoideans属，成年后寄生于鱼食性鸟类的肠道。棘孔虫的幼虫通常会引起鱼类的“白蛴螬”病。本文于2024年7月在美国乔治亚州采集了绿苍鹭（Butorides virescens）和大白鹭（Ardea alba）的pothodiplostomum spsp，包括2个新种。我们在本研究中提供了这两个新种的描述。采集到的所有物种均产生了部分核28S rDNA和线粒体cox1基因DNA序列；利用新获得的28S序列，研究了该新种间的系统发育关系，发现该新种具有亚球形的胞体，这一特征仅存在于少数其他物种中，特别是寄生于同一种鸟类寄主的aztlanensis和nanum。尽管半毛犀叶后（Posthodiplostomum seminolense n. sp）、dawnsherryae n. sp、aztlanensis和P. nanum之间形态差异很小，但这些形态相似的物种在部分28S序列上的差异为0.5-5.9%，在部分cox1序列上的差异为10.9-17.4%。nanum的原始描述是基于未成熟的标本；我们提供了一个新的描述，基于先前测序的标本从一个大白鹭在美国密西西比州，允许更好的比较。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

求助全文

约1分钟内获得全文求助全文

来源期刊

Systematic Parasitology 医学-寄生虫学

CiteScore

2.20

自引率

23.10%

发文量

审稿时长

6-12 weeks

期刊介绍： Systematic Parasitology publishes papers on the systematics, taxonomy and nomenclature of the following groups: Nematoda (including plant-parasitic), Monogenea, Digenea, Cestoda, Acanthocephala, Aspidogastrea, Cestodaria, Arthropoda (parasitic copepods, hymenopterans, mites, ticks, etc.), Protozoa (parasitic groups), and parasitic genera in other groups, such as Mollusca, Turbelleria, etc. Systematic Parasitology publishes fully illustrated research papers, brief communications, and fully illustrated major revisions. In order to maintain high standards, all contributors describing new taxa are asked to state clearly where the holotype is deposited and to make paratypes available for examination by the referees. It is recognized that, in some cases, this may cause problems for the authors, but it is hoped that by adhering to this rule authors may be protected against rapid synonymy of their taxa, and the types will be preserved for posterity.