Studies on the Trematode Family Strigeidae (Holostomidae) No. XIII. Three New Species of Tetracotyle

Hughes, R. Chester

doi:10.2307/3222239

Cited by 16 publications

(17 citation statements)

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“…After dissection and removal from the fish, the eyes were opened to reveal the lens, vitreous body, and subretinal regions, which were examined for metacercariae. The worms recovered were washed in 0.9% saline solution and roughly identified using the descriptions of and keys to the metacercarial diplostomoids in Hughes (1929) and Gibson et al (2002), and then following the identification key to the metacercariae in fishes available in Gibson (1996). The further processing of specimens depended on the analysis to be performed, i.e., morphology, ultrastructure, genetics, or morphometrics and is described below.…”

Section: Methodsmentioning

confidence: 99%

Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal

et al. 2011

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The morphology, ultrastructure, genetics, and morphometrics of a species of Diplostomum von Nordmann 1832 (Digenea: Diplostomidae), isolated from the European flounder (Platichthys flesus (L.)) caught off the northwest coast of Portugal, are characterized. The metacercarial stage was found unencysted in the lens capsule of the eye. Light microscopical observations revealed the existence of some variability in specimen shape and size, with two morphotypes, referred to as "round" and "long", being apparent. Scanning electron microscopy revealed a smooth, unarmed tegument, with the lappet region being the most irregular and porose. Both the oral and ventral suckers were provided with a series of papillae, which presented very distinctive ultrastructural features and were particularly conspicuous in the case of the ventral sucker. The two morphotypes detected were found to have 100% genetic correspondence in the 18S + ITS1 + 5.8S region of the rDNA. Since the genetic data for this metacercaria differed from those of the species of Diplostomum available in GenBank, a description of a new genotype (accession number GQ370809) is provided. The molecular phylogenetic analyses, in conjunction with principal components and cluster analyses based on morphometric data, revealed the existence of consistent differences between the Diplostomum sp. metacercariae from flounder compared with Diplostomum spathaceum, Diplostomum mergi, Diplostomum pseudospathaceum, and Diplostomum paracaudum. The latter of these species was found to be the most similar to the present material. Our results do not support an evolutionary separation of the European and North American species of Diplostomum.

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Section: Methodsmentioning

confidence: 99%

Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal

et al. 2011

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“…Adult of Hysteromorpha corti (Hughes, 1929) from Phalacrocorax auritus , Montreal, Quebec, Canada. Italy.…”

Section: Resultsmentioning

confidence: 99%

“…In the Nearctic, Hughes (1929) provided the first description of Hysteromorpha , from metacercariae in the muscle of Ameiurus nebulosus and Ameiurus melas in the Illinois River. Hughes (1929) named these metacercariae Diplostomulum corti . Hugghins (1954a, 1954b) synonymized D. corti with Hysteromorpha triloba (Rudolphi, 1819) Lutz 1931.…”

Section: Resultsmentioning

confidence: 99%

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Nuclear and mitochondrial phylogenomics of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes)¹

Caffara

et al. 2018

Preprint

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phylogenetic studies, namely the possible placement of the Cyathocotylidae outside the 109 Diplostomoidea (Hernández-Mena et al., 2017), and the Diplostomidae as a basal lineage in the 110 order Plagiorchiida (Brabec et al., 2015). Both results originate from analysis of mtDNA, and we 111 obtained data to determine if these patterns were robust to additional taxon sampling. To decide 112 between what were likely to be conflicting topologies based on mtDNA and rDNA, we 113 employed phylogenomic analyses of ultra-conserved elements (UCEs). 114Although we set out to work on higher relationships among a small number of 115 representative specimens, we were aware that the diversity and identity of diplostomoid species 116 often differs from initial suspicions based on morphology (Blasco-Costa and Locke, 2017). We 117 therefore supported our identifications with morphological comparisons and analysis of 118 additional DNA sequences from closely related species, which led to several findings related to 119 the alpha taxonomy of the seven specimens of principal interest. 120 121 2. Materials and Methods 122 2.1 Specimen collection and identification 123

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“…It can be distinguished from Tetracotyle of A. pellucidus by the number of genital rudiments and from Tetracotyle of A. fuligulae in having two masses of genital rudiments and in the absence of prepharynx. It differs from T, communis and T, diminuta Hughes, 1928 in the pattern of excretory system and number of genital rudiments, Tetracotyle srivastavai n. sp.…”

Section: Discussionmentioning

confidence: 99%

Studies on someTetracotyle Fillipi (1859) metacercariae from fishes of Lucknow

Agrawal

Khan

1982

Proc Ani Sci

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Three unknown Tetracotyle metacercariae , collected from piscme host, have been described. Tetracotyle pandei n.sp., Tetracotyle srivastavai n.sp, and Tetracotyle ramalingi n.sp. were collected from the visceral organs and musculature of Channa punctatus (BI.). They are characterised by the shape and position of pseudosuckers, shape of hold fast organ and hold fast gland, number and position of genital rudiment and pattern of reserve excretory system.Keywords. Tetracotyle pandei n.sp.,; Tetracotylc srivastavai n.sp.; Tetracotyle ramalingi n.sp. ; metacercariae ; Channa punctatus (BI.).Tetracotyle pandei" n, sp Host: Channa punctatus (Bl.) Location : mesenteries and liver of infected host Locality: Lucknow Number of host examined : 55 Number of host found infected: 3 Measurements in mm, Cyst-l'22-1 '24 X 0 '75-0 '76, outer layer-l '22-1 '24 X 0'75-0'76, middle layer-0'66-Q'69 and inner layer-Q'44-Q'46 X 0'24-0'26. Body-I'80-1'82 X 1'32-1'33 (live) and 0'52-0'57 X 0'40-0'50 (fixed). Oral sucker-O'13-0'14 (live) and 0'07-0'08 (fixed). Ventral sucker 0'19-0'20 (live) and 0 '09-0 '10 (fixed).Pharynx-O '04-0 '07 (live) and 0 '02-0 '03 (fixed). Pseudosucker-e-Or l Sc-Or.l S X 0'13-Q'14 (fixed). Hold fast organ-0'08-O'09 X 0'05-Q'06 (fixed).Oval cyst (figure I) three layered. Outer layer thick, fibrous, tough and pigmented, middle and inner layers thin. Body (figure 2) aspinose, with broad anterior and narrow posterior ends. Ventral sucker equatorial, larger. Large triangular pseudosucker one pair, posterior to oral sucker. Host fast gland triangular, deeply stained cell mass. Mouth terminal. Pharynx round and muscular.• The species has been named in honour of Late Prof. B P Pande. 515

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Studies on the Trematode Family Strigeidae (Holostomidae) No. XIII. Three New Species of Tetracotyle

Cited by 16 publications

References 4 publications

Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal

Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal

Nuclear and mitochondrial phylogenomics of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes)¹

Studies on someTetracotyle Fillipi (1859) metacercariae from fishes of Lucknow

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Studies on the Trematode Family Strigeidae (Holostomidae) No. XIII. Three New Species of Tetracotyle

Cited by 16 publications

References 4 publications

Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal

Morphology, ultrastructure, genetics, and morphometrics of Diplostomum sp. (Digenea: Diplostomidae) metacercariae infecting the European flounder, Platichthys flesus (L.) (Teleostei: Pleuronectidae), off the northwest coast of Portugal

Nuclear and mitochondrial phylogenomics of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes)1

Studies on someTetracotyle Fillipi (1859) metacercariae from fishes of Lucknow

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Nuclear and mitochondrial phylogenomics of the Diplostomoidea and Diplostomida (Digenea, Platyhelminthes)¹