Description of a New Genus and Species of Cyathocotylid Digeneans from Australia.

Maggie A Young, Vasyl V Tkach, Jeffrey A Bell, Ludovica Valenza, Amber Gillett, Tyler J Achatz

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Article in Acta parasitologica, 2026. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Not yet cited in PubMed.

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6 authors.

Maggie A YoungDepartment of Natural Sciences, Middle Georgia State University, 100 University Parkway, 31206, Macon, Georgia.ORCID https://orcid.org/0009-0008-0834-2220

Vasyl V TkachDepartment of Biology, University of North Dakota, 10 Cornell Street Stop 9019, Grand Forks, North Dakota, 58202, USA.ORCID https://orcid.org/0000-0001-5084-7566

Jeffrey A BellDepartment of Biology, University of North Dakota, 10 Cornell Street Stop 9019, Grand Forks, North Dakota, 58202, USA.ORCID https://orcid.org/0000-0001-9146-4318

Ludovica ValenzaAustralia Zoo Wildlife Hospital, Beerwah, QLD, 4519, Australia.ORCID https://orcid.org/0009-0003-6162-5936

Amber GillettAustralia Zoo Wildlife Hospital, Beerwah, QLD, 4519, Australia.ORCID https://orcid.org/0000-0002-7163-1761

Tyler J AchatzDepartment of Natural Sciences, Middle Georgia State University, 100 University Parkway, 31206, Macon, Georgia. tyler.achatz@mga.edu.ORCID https://orcid.org/0000-0003-2472-4372

Funding

No grant is acknowledged in the PubMed record.

6 · The paper itself

Abstract

purposeCyathocotylidae Mühling, 1896 is a cosmopolitan family of diplostomoidean digeneans characterized by a broad range of vertebrate definitive hosts, including fishes, birds, reptiles, and mammals. Cyathocotylid diversity in Australasia remains poorly known. In the present study, we describe a new genus and species of cyathocotylid digenean collected from the small intestine of the Australasian gannet, Morus serrator, in Queensland, Australia.

methodsAdult cyathocotylid specimens were collected from the small intestine of an Australasian gannet in Queensland. Specimens were stained, mounted, and examined using DIC microscopy. Genomic DNA was extracted, and a fragment of the large ribosomal subunit (28S) rDNA was sequenced and compared with available sequences from cyathocotylids.

resultsA new genus and species, Glandocirrus crikey n. gen., n. sp., is described. It can be readily distinguished from all other cyathocotylid genera by its exceptionally large, strongly glandular cirrus sac. The 28S sequence is identical to previously published unidentified cercariae from Australia, thereby linking larval and adult stages and confirming the distinctiveness of the lineage.

conclusionsThis discovery represents the seventeenth genus of Cyathocotylidae and only the second from Australasia supported by DNA data, emphasizing the underexplored diversity of diplostomoideans in the region.

Indexed as

TrematodaTrematode InfectionsAnimalsAustraliaDNA, HelminthDNA, RibosomalIntestine, SmallMicroscopyPhylogenyQueenslandRNA, Ribosomal, 28SSequence Analysis, DNADNA, HelminthDNA, RibosomalRNA, Ribosomal, 28SAustraliaCyathocotylidaeDiplostomoideaGlandocirrus n. gen.MorusNew genusNew species

Identifiers

PMID41915298

DOI10.1645/24-33

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