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(2020). "No vagina, one vagina, or multiple vaginae? An integrative study of Pseudaxine trachuri (Monogenea, Gastrocotylidae) leads to a better understanding of the systematics of Pseudaxine and related genera". Parasite 27: 50. DOI:10.1051/parasite/2020046. ISSN 1776-1042.

No vagina, one vagina, or multiple vaginae? An integrative study of Pseudaxine trachuri (Monogenea, Gastrocotylidae) leads to a better understanding of the systematics of Pseudaxine and related genera 

scientific article published on 18 August 2020
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Instance of	scholarly article
Main subject	Allogastrocotyle Gastrocotylidae Monogenea Pseudaxine Pseudaxinoides vagina
Author	Chahinez Bouguerche (1) Fadila Tazerouti (2) Delphine Gey (3) Jean-Lou Justine (4)
Published in	Parasite
Language of work or name	English
Copyright license	Creative Commons Attribution 4.0 International (2020–)
Publication date	18 August 2020
Authority file  Q99232037 DOI: 10.1051/PARASITE/2020046 PubMed ID: 32808922 PMCID: 7433403 ZooBank publication ID: 7589B476-E0EB-4614-8BA1-64F8CD0A1BB2 Reasonator Scholia Wikidocumentaries PetScan statistics WikiMap Locator tool KML file Search depicted

Chahinez Bouguerche, Fadila Tazerouti, Delphine Gey and Jean-Lou Justine

Abstract
The presence/absence and number of vaginae is a major characteristic for the systematics of the Monogenea. Three gastrocotylid genera share similar morphology and anatomy but are distinguished by this character: Pseudaxine Parona & Perugia, 1890 has no vagina, Allogastrocotyle Nasir & Fuentes Zambrano, 1983 has two vaginae, and Pseudaxinoides Lebedev, 1968 has multiple vaginae. In the course of a study of Pseudaxine trachuri Parona & Perugia 1890, we found specimens with structures resembling “multiple vaginae”; we compared them with specimens without vaginae in terms of both morphology and molecular characterisitics (COI barcode), and found that they belonged to the same species. We also investigated the male copulatory organ (MCO) of this species, the accuracy of the original description of which is known to be a matter of debate. We found that the genital atrium is armed with 12 hooks arranged as a single circle and a central hollow stylet which is probably involved in traumatic insemination. We redescribed Pseudaxine trachuri based on newly collected specimens from off the coast of Algeria and Museum specimens from off France. Specimens from the type-host, Trachurus trachurus, were found to be similar, for both molecular sequences and morphology, to those found on Boops boops. We can therefore confirm, for the first time with molecular evidence, that B. boops is a host of this parasite. We consider that Pseudaxinoides was erected on the basis of an erroneous interpretation of structures which are not vaginae and, consequently, propose the transfer of most of its species to Pseudaxine, as P. australis (Lebedev, 1968) n. comb., P. bychowskyi (Lebedev, 1977) n. comb., P. caballeroi (Lebedev, 1977) n. comb., P. cariacoensis (Nasir & Fuentes-Zambrano, 1983) n. comb., and P. vietnamensis (Lebedev, Parukhin & Roitman, 1970) n. comb. We also propose Allogastrocotyle dillonhargisorum nom. nov. for Pseudaxine bivaginalis Dillon & Hargis, 1965 to avoid a secondary homonymy.