Systematic implications of male caudal morphology in ascaridoid nematode parasites

Fagerholm, Hans-Peter

doi:10.1007/bf00011888

Cited by 102 publications

(126 citation statements)

References 33 publications

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“…Later, several workers [38,39] used barcode structures to propose phylogenetic hypotheses for some ascaridoids, and the phylogenetic trees were developed with the help of ribosomal DNA sequences. These trees supported the classification of Ascaridoidea [19] proposed earlier, though the detailed illustrations later inferred [13] that rDNA based genetic characterization was heavily biased towards a single locus, and therefore, certain queries remained unanswered.…”

Section: Discussionsupporting

confidence: 81%

“…The systematics of Ascaridoids was reorganized to comprise 5 families and 8 subfamilies [19], based on the structure of secretory-excretory system, in combination with the established concepts [37]. Later, several workers [38,39] used barcode structures to propose phylogenetic hypotheses for some ascaridoids, and the phylogenetic trees were developed with the help of ribosomal DNA sequences.…”

Section: Discussionmentioning

confidence: 99%

“…There has been no report on the same individual fish serving as intermediate as well as definitive host of a Raphidascaridoid nematode from freshwater fish hosts in India. The distinctive taxonomic status of family Anisakidae, comprising subfamilies Anisakinae and Contracaecinae, separate from Raphidascarididae, has already been recognized [19]. The transversions-weighted bootstrap tree published earlier [13] did not recover the grouping of Goezia with anisakids, but Goezia was a part of Raphidascarididae with higher (99%) bootstrap support in the combined evidence tree.…”

Section: Introductionmentioning

confidence: 93%

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Molecular Characterization of Host-Specific Raphidascaridoid Worms from the Gangetic Garfish (Teleostomi: Belonidae) in India

Malhotra¹

2017

IJMBOA

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The 18S rDNA gene analysis with Internal Transcribed Spacers 1 and 2, and Mit. coi gene analyses of 12 sequences from the host-specific nematodes parasitizing liver of garfish, Xenentodon cancila (Belonidae) revealed their monophyletic characterization. The purification of PCR products was done using Centri-Sep spin columns (Princeton Separations, Adelphia, New Jersey, USA) and sequenced by ABI 3730 auto sequencer Applied Biosystems. Their genetic heterogeneity on the basis of comparable sequences from gnathostomatoid genus, Gnathostoma, 16 anisakid and ascaridoid genera assisted these to be ascribed to a newer genus, Indospinezia multispinatum gen. et sp. n. under a newly erected tribe Indospineziinea tribe n. under family Goeziinae, as the morphological differentiation distinctly segregated their taxonomic identity. The fish host, X. cancila acted as the common intermediate as well as definitive host in the Gangetic riverine ecosystem at Allahabad, India. Though the newer worms had typical gnathostomatoid (fish spirurins) characters, yet the single-toothed unidentate spines, cervical sacs, and the number of caudal papillae, that comprised pre-cloacal foliate as well as 'sunflower' papillae, differentiated them from the spirurins. The postlabial double-ridged cuticular collar at the base of head, and an altogether different sclerotized oral lid-plate distinguished these worms from genus Goezia as well as spirurins. Therefore, the new genus, has been accommodated under a newly raised tribe, Indospineziinea tribe n.

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Section: Discussionsupporting

confidence: 81%

Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 93%

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Molecular Characterization of Host-Specific Raphidascaridoid Worms from the Gangetic Garfish (Teleostomi: Belonidae) in India

Malhotra¹

2017

IJMBOA

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“…The taxonomic classification of nematodes was made in accordance with Fagerholm (1991). The larvae were identified as described by Felizardo et al (2009) and Fontenelle et al (2013).…”

Section: Methodsmentioning

confidence: 99%

Anisakid larva parasitizing Plagioscion squamosissimus in Marajó Bay and Tapajós River, state of Pará, Brazil

Fontenelle

Knoff

Felizardo

et al. 2016

Rev. Bras. Parasitol. Vet.

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In November 2014 and May 2015, a total of 44 specimens of the South American silver croaker Plagioscion squamosissimus were collected: 30 in Marajó Bay and 14 in the Tapajós River, state of Pará, Brazil. The aim was to investigate the presence of anisakid nematodes and determine their parasitism indices and sites of infection, because of their importance regarding health inspection. Sixty-nine Anisakis sp. larvae were found; among them, 16 larvae in seven fish collected in Marajó Bay and 53 larvae in four fish in the Tapajós River. The parasitism indices of the nematodes collected from the fish in Marajó Bay comprised prevalence (P) of 23%, mean infection intensity (MI) of 2.28, mean abundance (MA) of 0.53, range of infection (RI) of 1-4, and infection site (IS) in the mesentery. The fish from the Tapajós River showed P = 28%, MI = 13.2, MA = 3.8, RI = 1-22, and IS = mesentery and intestine. To assist in taxonomic identification, images of the specimens obtained through optical microscopy with Nomarski's interferential contrast system and scanning electron microscopy were used. This is the first record of Anisakis sp. parasitizing P. squamosissimus.Keywords: Sciaenidae, freshwater fish, Anisakidae, Northern Brazil. ResumoEm novembro de 2014 e maio de 2015, foi coletado um total de 44 espécimes de pescada branca, Plagioscion squamosissimus, sendo 30 na Baía de Marajó e 14 no Rio Tapajós, Estado do Pará, Brasil, com o objetivo de pesquisar a presença de nematoides anisaquideos e fornecer os índices parasitários, assim como os sítios de infecção, devido a sua importância na inspeção sanitária. Encontrou-se um total de 69 larvas de Anisakis sp., sendo 16 em 7 peixes coletados da Baía de Marajó e 53 larvas em 4 peixes do Rio Tapajós. Os índices parasitários desses nematoides coletados dos peixes da Baía de Marajó apresentaram prevalência (P) de 23%, intensidade média (IM) de 2,28, abundância média (AM) de 0,53, amplitude de variação da intensidade de infecção (AI) de 1-4 e sítio de infecção (SI) o mesentério; e os do Rio Tapajós P = 28%, IM = 13,2, AM = 3,8, AI = 1-22 e SI = mesentério e intestino. Para auxiliar na identificação taxonômica foram utilizadas imagens obtidas dos espécimes por microscopia ótica com sistema de contraste interferencial de Nomarski e microscopia eletrônica de varredura. Esse é o primeiro registro de Anisakis sp. parasitando P. squamosissimus.Palavras-chave: Sciaenidae, peixe de água doce, Anisakidae, Norte do Brasil.

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“…The taxonomic classification of nematodes was made in accordance with Fagerholm (1991). The larvae were identified as described by Deardorff & Overstreet (1981), Timi et al (2001), Felizardo et al (2009a) and Knoff et al (2012).…”

Section: Methodsmentioning

confidence: 99%

Anisakidae and Raphidascarididae larvae parasitizing Selene setapinnis (Mitchill, 1815) in the State of Rio de Janeiro, Brazil

Fontenelle

Knoff

Felizardo

et al. 2015

Rev. Bras. Parasitol. Vet.

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Between February and August, 2012, thirty specimens of Atlantic moonfish, Selene setapinnis, were purchased in local markets in Niterói, State of Rio de Janeiro, Brazil, with the aim of analyzing the presence of anisakid nematodes, establishing their rates of parasitism and infection sites, due to importance in the sanitary inspection. A total of sixty nematode larvae, belonging to at least two species were found: nine larvae of Terranova sp., Anisakidae, with prevalence (P) of 13.3%, mean intensity (MI) of 2.25, mean abundance (MA) of 0.30 and range of infection intensity (RI) from 1 to 6; and 51 larvae of Hysterothylaciumfortalezae, Raphidascarididae, with P = 26.7%, MI = 6.40, MA = 1.70, and RI = 1-17. The infection sites for Terranova sp. were the mesentery and liver serosa; and for H. fortalezae, the infection sites were the mesentery, abdominal cavity and liver serosa. New morphological data from scanning electron microscopy, on the external structures of H. fortalezae (mainly at the posterior end), are presented. This is the first report of H. fortalezae parasitizing S. setapinnis.

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Systematic implications of male caudal morphology in ascaridoid nematode parasites

Cited by 102 publications

References 33 publications

Molecular Characterization of Host-Specific Raphidascaridoid Worms from the Gangetic Garfish (Teleostomi: Belonidae) in India

Molecular Characterization of Host-Specific Raphidascaridoid Worms from the Gangetic Garfish (Teleostomi: Belonidae) in India

Anisakid larva parasitizing Plagioscion squamosissimus in Marajó Bay and Tapajós River, state of Pará, Brazil

Anisakidae and Raphidascarididae larvae parasitizing Selene setapinnis (Mitchill, 1815) in the State of Rio de Janeiro, Brazil

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