Pseudocapillaria (Ichthyocapillaria) bumpi n. sp. (Nematoda: Capillariidae) Parasitising West African Lungfish Protopterus annectens (Owen, 1839) (Lepidosireniformes: Protopteridae) in Mozambique and Its Phylogenetic Position Within Capillariid Nematodes

Svitin, Roman; Bullard, Stephen A.; Dutton, Haley R.; Netherlands, Edward C.; Syrota, Yaroslav; Verneau, Olivier; Preez, Louis Du

doi:10.1007/s11686-021-00389-1

Cited by 2 publications

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References 9 publications

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“…The use of DNA-based molecular techniques is one of the recent advancements for the accurate identification and understanding of nematode evolutionary relationships [ 8 , 9 ]. The nuclear small subunit of the ribosomal gene (18S rRNA) has been frequently used to analyze phylogenetic relationships among nematodes at different taxonomic levels, especially of some representative capillariids [ 5 , 10 – 14 ]. Genome-based phylogenetic analyses such as mitochondrial (mt) genome (mitogenome) are increasingly utilized by the taxonomist for a better understanding of nematodes’ relationships at various taxonomic levels and/or judgment of the discordances and congruences with morphology-based and nuclear rDNA-based phylogenies due to the shortcomings of 18S rRNA [ 15 , 16 ].…”

Section: Introductionmentioning

confidence: 99%

Aonchotheca (Nematoda: Capillariidae) is validated as a separated genus from Capillaria by both mitochondrial and nuclear ribosomal DNA

et al. 2022

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Background The family Capillariidae is a group of thread-like nematodes of 27 genera and over 300 species that infect a great variety of hosts including humans. Among these, some taxa such as the genus Aonchotheca have remained controversial regarding their systematic status for decades. The aim of the current study was to verify Aonchotheca’s systemic status and to further determine whether it is a distinct genus from Capillaria using molecular and phylogenetic analyses. Results We sequenced the mitochondrial (mt) genome and nuclear small subunit (18S) rRNA gene of Aonchotheca putorii, a representative species of the genus, and investigated its systematic status in Trichinellida using maximum likelihood and Bayesian inference. The differences in amino acid sequences of 13 protein-coding genes were 12.69–67.35% among Aonchotheca, Capillaria, Eucoleus, and Pseudocapillaria with cox1 (12.69%) and atp8 (67.35%) as the most and the least conserved gene, respectively, and the difference of two mt rRNAs was 18.61–34.15%. Phylogenetic analyses of the complete mt genome and 18S rRNAs unequivocally showed that Aonchotheca was a distinct genus from Capillaria. Conclusions Large difference exists among Aonchotheca, Capillaria, Eucoleus, and Pseudocapillarias. Aonchotheca putorii is the first species in the genus Aonchotheca for which a complete mitogenome has been sequenced. These data are useful for phylogenetics, systematics and the evolution of Capillariidae. Graphical Abstract

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Section: Introductionmentioning

confidence: 99%

Aonchotheca (Nematoda: Capillariidae) is validated as a separated genus from Capillaria by both mitochondrial and nuclear ribosomal DNA

et al. 2022

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Description of Pseudocapillaria (Discocapillaria) trilobularis n. sp. (Capillariidae) and redescription of Heliconema alatum (Majumdar, 1965) (Physalopteridae), two nematodes parasitising synbranchiform fishes in India

Moravec

Chaudhary²,

Kashyap³

et al. 2022

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One new nematode species is described and another one, already known species is redescribed based on specimens collected from synbranchiform shes of the River Ganga, India, in 2021 and 2022: Pseudocapillaria (Discocapillaria) trilobularis n. sp. (Capillariidae) from the intestine of cuchia, Monopterus cuchia (Hamilton) (Synbranchidae), is mainly characterised by the presence of the large ventral postcloacal lobe in the male, the spicule length 351 µm, the size of eggs 60-69 × 30-36 µm (with protruding polar plugs) and by the body length (male 10.50 mm, females 11.02-12.44 mm). It is the fourth species of this genus recorded from shes in India. The species name Heliconema alatum (Majumdar, 1965) (Physalopteridae) is resurrected. This nematode is redescribed from specimens collected from the intestine of zig-zag eel, Mastacembelus armatus (Lacepède) (Mastacembelidae). The examination by SEM revealed some previously not reported morphological features in this nematode species, e.g., the presence of cephalic papillae or a lateroterminal depression and two inner at dorsoventral teeth on each pseudolabium. Based on these ndings, H. monopteri Moravec, Chaudhary & Singh, 2019 is considered a junior synonym of H. alatum.

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Pseudocapillaria (Ichthyocapillaria) bumpi n. sp. (Nematoda: Capillariidae) Parasitising West African Lungfish Protopterus annectens (Owen, 1839) (Lepidosireniformes: Protopteridae) in Mozambique and Its Phylogenetic Position Within Capillariid Nematodes

Cited by 2 publications

References 9 publications

Aonchotheca (Nematoda: Capillariidae) is validated as a separated genus from Capillaria by both mitochondrial and nuclear ribosomal DNA

Aonchotheca (Nematoda: Capillariidae) is validated as a separated genus from Capillaria by both mitochondrial and nuclear ribosomal DNA

Description of Pseudocapillaria (Discocapillaria) trilobularis n. sp. (Capillariidae) and redescription of Heliconema alatum (Majumdar, 1965) (Physalopteridae), two nematodes parasitising synbranchiform fishes in India

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