2021
DOI: 10.1051/parasite/2021065
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Three new species of Creptotrema (Trematoda, Allocreadiidae) with an amended diagnosis of the genus and reassignment of Auriculostoma (Allocreadiidae), based on morphological and molecular evidence

Abstract: Diversity of Creptotrema was investigated using morphological and molecular tools, including data for Creptotrema creptotrema (type-species). Three new species, parasites of Brazilian fishes, are described: Creptotrema conconae n. sp. (type-host, Imparfinis mirini Haseman), Creptotrema schubarti n. sp. (type-host, Characidium schubarti Travassos) and Creptotrema megacetabularis n. sp. (type-host, Auchenipterus osteomystax (Miranda Ribeiro)). The diagnosis of the genus was amended to include new features. The n… Show more

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Cited by 9 publications
(25 citation statements)
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“…In particular, the number of oral papillae can be variable, however, the papillae that are constant in number are the internal papillae close to the mouth (4) and the posterior external papillae (5). This peculiarity of the number of internal and posterior oral papillae had already been observed in other genera such as Creptotrema (Razo-Mendivil et al, 2014;Hernández-Mena et al, 2016;2019;Montes et al, 2021), Paracreptotrema (Choudhury et al, 2006 Franceschini et al, 2021), who mentioned that the grouping of these trematodes is related to their hosts which are freshwater fishes of Neotropical origin. Species of all Neotropical genera have been recorded in Mexico, but other genera of allocreadiids have also been previously recorded, such as Allocreadium Looss, 1900, Crepidostomum Braun, 1900, Megalogonia Surber, 1928and Margotrema Lamothe-Argumedo, 1970(Perez-Ponce de León et al, 2007Galaviz-Silva et al, 2013), which have rather a Neartic affinity, so that Mexico is clearly a country where historical geological processes have favored the coexistence of parasites and hosts (and other animals) with different biogeographical affinities (Aguilar-Aguilar et al, 2003;Miller et al, 2005;Pérez-Ponce de León & Choudhury, 2005;Chakrabarty & Albert, 2011;Choudhury et al, 2017;Morrone, 2014;2020).…”
Section: Discussionsupporting
confidence: 61%
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“…In particular, the number of oral papillae can be variable, however, the papillae that are constant in number are the internal papillae close to the mouth (4) and the posterior external papillae (5). This peculiarity of the number of internal and posterior oral papillae had already been observed in other genera such as Creptotrema (Razo-Mendivil et al, 2014;Hernández-Mena et al, 2016;2019;Montes et al, 2021), Paracreptotrema (Choudhury et al, 2006 Franceschini et al, 2021), who mentioned that the grouping of these trematodes is related to their hosts which are freshwater fishes of Neotropical origin. Species of all Neotropical genera have been recorded in Mexico, but other genera of allocreadiids have also been previously recorded, such as Allocreadium Looss, 1900, Crepidostomum Braun, 1900, Megalogonia Surber, 1928and Margotrema Lamothe-Argumedo, 1970(Perez-Ponce de León et al, 2007Galaviz-Silva et al, 2013), which have rather a Neartic affinity, so that Mexico is clearly a country where historical geological processes have favored the coexistence of parasites and hosts (and other animals) with different biogeographical affinities (Aguilar-Aguilar et al, 2003;Miller et al, 2005;Pérez-Ponce de León & Choudhury, 2005;Chakrabarty & Albert, 2011;Choudhury et al, 2017;Morrone, 2014;2020).…”
Section: Discussionsupporting
confidence: 61%
“…The discovery of the new genus named Mesoamericatrema n. gen. was based on the comparative study of internal and external morphological characters (using SEM), on the host association, and on the phylogenetic analysis of the 28S region (domains D1, D2, and D3) of the ribosomal RNA unit. Morphologically, the new genus presents a very large cirrus sac in proportion to the length of its body (1: 2.1-2.9), a characteristic that easily differentiates it from the other genera of Allocreadiidae, since generally the species of the other genera have a cirrus sac that does not extend beyond the posterior margin of the ventral sucker, and when it does, the sac is not as large in proportion to the length of the body (Scholz et al 2004;Caira & Bogéa, 2005;Choudhury et al, 2006;Pérez Ponce de León et al, 2016;Franceschini et al, 2021). Scanning Electron Microscopy (SEM) images show that the external surface of the body of Mesoamericatrema n. gen. does not have spines, but it does have oral and ventro-lateral tegumental papillae, features it shares with other species of allocreadiids.…”
Section: Discussionmentioning
confidence: 99%
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