Pseudohurleytrema yolandae n. sp., the first monorchiid trematode reported from the Triacanthidae (Tetraodontiformes)

Wee, Nicholas Q.-X.; Crouch, K.; Cutmore, Scott C.

doi:10.1007/s11230-020-09924-6

Cited by 6 publications

(3 citation statements)

References 33 publications

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“…yolandae within this large clade consisting primarily of monorchiine taxa was demonstrated by Wee et al . (2020b), the nodal support for its position at the time (sister to Proctotrema addisoni Searle, Cutmore & Cribb, 2014) was poor. Overall, the phylogenetic position of P .…”

Section: Discussionmentioning

confidence: 99%

Gerricola queenslandensis n. g., n. sp., a new monorchiid trematode from the eastern Australian coast and its life cycle partially elucidated

2021

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Of over 250 species of Monorchiidae Odhner, 1911, just four are known from gerreid fishes. Here, we report adult specimens of a new species infecting Gerres oyena (Forsskål) and Gerres subfasciatus Cuvier from off Heron Island and North Stradbroke Island, Queensland, Australia. The species is morphologically most similar to the concept of Lasiotocus Looss, 1907, which currently comprises eight species, in the possession of an unspined genital atrium, bipartite terminal organ, round oral sucker and unlobed ovary. However, phylogenetic analyses of the 28S ribosomal DNA gene region shows the species to be distantly related to the two sequenced species of Lasiotocus – Lasiotocus mulli (Stossich, 1883) Odhner, 1911 and Lasiotocus trachinoti Overstreet & Brown, 1970 – and that it clearly requires a distinct genus; thus, we propose Gerricola queenslandensis n. g., n. sp. Morphologically, G. queenslandensis n. g., n. sp. differs significantly from L. mulli and L. trachinoti only in the possession of distinctly longer caeca, which terminate in the post-testicular region, and in the absence of a distinct gap in the terminal organ spines. The remaining species of Lasiotocus possess caeca that also terminate in the post-testicular region, which might warrant their transfer to Gerricola n. g. However, doubt about their monophyly due to a combination of significant morphological variation, a lack of information on some features and infection of a wide range of hosts, lead us to retain these taxa as species of Lasiotocus until molecular sequence data are available to better inform their phylogenetic and taxonomic positions. Sporocysts and cercariae of G. queenslandensis n. g., n. sp. were found in a lucinid bivalve, Codakia paytenorum (Iredale), from Heron Island. Sexual adult and intramolluscan stages were genetically matched with the ITS2 ribosomal DNA and cox1 mitochondrial DNA regions. This is the second record of the Lucinidae as a first intermediate host for the Monorchiidae. Additionally, we report sporocysts and cercariae of another monorchiid infection in a tellinid bivalve, Jactellina clathrata (Deshayes), from Heron Island. Molecular sequence data for this species do not match any sequenced species and phylogenetic analyses do not suggest any generic position.

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Section: Discussionmentioning

confidence: 99%

Gerricola queenslandensis n. g., n. sp., a new monorchiid trematode from the eastern Australian coast and its life cycle partially elucidated

2021

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“…Monorchiids are morphologically characterised by complex terminal genitalia armed with recurved spines, vitelline follicles in restricted fields, and well-developed uterine coils [11]. The genetic library for species allocated to the family has increased significantly in the recent years; several new species have been described following an integrative taxonomy approach, most of them from Australian marine fish [18,[25][26][27][29][30][31]. In a recent study, Wee et al [28] performed one of the most comprehensive studies for species in the genus Lasiotocus Looss 1907, a taxonomically problematic group within the Monorchiidae.…”

Section: Introductionmentioning

confidence: 99%

Monorchiids (Digenea, Trematoda) of fishes in the Yucatán Peninsula, Mexico, with the description of three new species based on morphological and molecular data

Andrade-Gómez¹,

Ortega-Olivares

Solórzano‐García³

et al. 2023

Parasite

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Adult specimens of monorchiids (Digenea) were collected from the intestines of the white grunt, Haemulon plumierii Lacepède (Haemulidae), and the white mullet, Mugil curema Valenciennes (Mugilidae) from five localities off the Yucatán Peninsula and one locality in the Gulf of Mexico. Some specimens were photographed and sequenced for two molecular markers, the large subunit (LSU) of nuclear rDNA and the cytochrome c oxidase subunit 1 (cox1) of mitochondrial DNA. Other specimens were processed for morphological analyses. Newly generated sequences were aligned with other sequences available in GenBank. Bayesian inference and maximum likelihood analyses were implemented using the data sets of LSU and cox1 independently. Reciprocal monophyly evidenced through phylogenetic analyses, sequence divergence values for both molecular markers, and detailed morphological analyses, including scanning electron microscopy photomicrographs, revealed three new genetic lineages, i.e., species, as parasites of M. curema. The three new species are Sinistroporomonorchis mexicanus n. sp., Sinistroporomonorchis yucatanensis n. sp., and Sinistroporomonorchis minutus n. sp. Two additional species of monorchiids were sampled, characterised molecularly, and re-described, namely Sinistroporomonorchis glebulentus (Overstreet, 1971) from the white mullet, and Alloinfundiburictus haemuli (Overstreet, 1969), from the white grunt.

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“…longicollis Yamaguti, 1934 is represented by genetic sequence data. Recent phylogenetic analyses have reported it as sister to all other monorchiid taxa (Wee et al ., 2020 a , 2020 b , 2020 c ), or to all except Cableia pudica Bray et al ., 1996 (Panyi et al ., 2020; Wee et al ., 2021 b ).…”

Section: Introductionmentioning

confidence: 99%

Three new species of Helicometroides Yamaguti, 1934 from Japan and Australia, with new molecular evidence of a widespread species

et al. 2022

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We report specimens of monorchiids infecting Haemulidae from the waters off Japan and Australia; these specimens represent five species of Helicometroides Yamaguti, 1934, three of which are unambiguously new. Helicometroides murakamii n. sp. infects Diagramma pictum pictum from off Minabe, Japan; Helicometroides gabrieli n. sp. infects Plectorhinchus chrysotaenia from off Lizard Island, Australia; and Helicometroides wardae n. sp. infects Plectorhinchus flavomaculatus and Plectorhinchus multivittatus from off Heron Island, Australia. Helicometroides murakamii n. sp. and H. gabrieli n. sp. conform to the most recent diagnosis of Helicometroides in lacking a terminal organ, but H. wardae n. sp. possesses a terminal organ with distinct, robust spines; despite this morphological distinction, the three form a strongly-supported clade in phylogenetic analyses. We also report specimens morphologically consistent with Helicometroides longicollis Yamaguti, 1934, from D. pictum pictum from off Minabe, Japan, and Diagramma pictum labiosum on the Great Barrier Reef, Australia. Genetic analyses of ITS2 rDNA, 28S rDNA and cox1 mtDNA sequence data for the Japanese specimens reveal the presence of two distinct genotypes. Specimens of the two genotypes were discovered in mixed infections and are morphologically indistinguishable; neither genotype can be associated definitively with H. longicollis as originally described. We thus identify them as H. longicollis lineage 1 and 2, pending study of further fresh material. Genetic analyses of specimens from the Great Barrier Reef are consistent with the presence of only H. longicollis lineage 1. This species thus has a range that incorporates at least Australia and Japan, localities separated by over 7000 km.

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Pseudohurleytrema yolandae n. sp., the first monorchiid trematode reported from the Triacanthidae (Tetraodontiformes)

Cited by 6 publications

References 33 publications

Gerricola queenslandensis n. g., n. sp., a new monorchiid trematode from the eastern Australian coast and its life cycle partially elucidated

Gerricola queenslandensis n. g., n. sp., a new monorchiid trematode from the eastern Australian coast and its life cycle partially elucidated

Monorchiids (Digenea, Trematoda) of fishes in the Yucatán Peninsula, Mexico, with the description of three new species based on morphological and molecular data

Three new species of Helicometroides Yamaguti, 1934 from Japan and Australia, with new molecular evidence of a widespread species

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