Spiroxys ankarafantsika Roca et Garcia, 2008 (Nematoda: Gnathostomatidae) and Other Nematodes Parasitising Pelusios spp. (Testudines: Pelomedusidae) from South Africa and Mozambique

Nel, Teneal; Preez, Louis Du; Netherlands, Edward C.; Syrota, Yaroslav; Svitin, Roman

doi:10.1007/s11686-021-00352-0

Cited by 2 publications

(2 citation statements)

References 11 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Nematodes belonging to the genus Spiroxys Schneider are mainly parasites of freshwater chelonians, frogs, salamander, and snakes (Berry 1985) in adult stage, some of which are also commonly found in the locality where these fish were collected in the present study. Of the 18 species assigned to the genus Spiroxys (Baker 1987;Hasegawa et al 1998;Moravec and Vargas-Vazquez 1998;Roca et al 2007;Nel et al 2021), one has been reported in Australia (Berry 1985). The Australian Spiroxys species, S. chelodinae, in its adult form, occurs in three species of freshwater chelonian turtles, namely Chelodina longicollis, C. expansa and C. oblonga, and has been reported from Armidale (New South Wales), Fraser Island (Queensland), Milang, Tailem Bend, Mannum and Lake Alexandrina (South Australia).…”

Section: Discussionmentioning

confidence: 99%

See 1 more Smart Citation

Characterisation of nematode larvae found in a vulnerable native Australian fish, the southern pygmy perch, Nannoperca australis Günther

2023

View full text Add to dashboard Cite

Context The southern pygmy perch (Nannoperca australis) is an endemic freshwater fish in Australia that is facing population decline and is listed as endangered or vulnerable in several states. Aims The aim of this study was to investigate the presence of parasites in the southern pygmy perch population and provide insights into their effect on the health and conservation of the species. Methods In total, 81 southern pygmy perch specimens were examined for parasite infections, followed by characterisation of the parasites. Key results The postmortem examination of the fish specimens did not show any visible parasites. However, through the incubation method, nematode larvae were discovered in 14 fish (mean intensity 1.6, mean abundance 0.28). Conclusions This study represents the first report of nematode larvae belonging to the genus Spiroxys in Australia, specifically in the southern pygmy perch. These findings highlighted the presence of parasite infections in the endangered southern pygmy perch and underscored the importance of conducting further research on parasites and their potential effect on the health and conservation of this species. Implications The discovery of nematode larvae in the southern pygmy perch raises concerns about the potential effects of parasites on the population.

show abstract

Section: Discussionmentioning

confidence: 99%

“…Habronema muscae was used as an outgroup. Bayesian posterior probability values of >90% are indicated above the branches(Ando et al 2006;Li et al 2014;Nel et al 2021;Shamsi et al 2021c;Tsuchida et al 2021). The asterisk (*) indicates the specimen obtained from this study.…”

mentioning

confidence: 99%

Characterisation of nematode larvae found in a vulnerable native Australian fish, the southern pygmy perch, Nannoperca australis Günther

2023

View full text Add to dashboard Cite

show abstract

Morphological description and molecular characterization of Ancyracanthus electrophori n. sp. (Gnathostomatoidea: Gnathostomatidae): a new nematode parasitic in the electric eel Electrophorus varii (Gymnotiformes: Gymnotidae), from the Brazilian Amazon

et al. 2023

View full text Add to dashboard Cite

A new species of Ancyracanthus, parasite of the electric eel Electrophorus varii, in the Brazilian Amazon, is described based on morphological and molecular characterization. Ancyracanthus electrophori n. sp. differs from the two congeners namely, Ancyracanthus pinnatifidus and Ancyracanthus schubarti, based on the structure of cephalic appendages, number and arrangement of caudal papillae in males, vulva very close to anus in females, eggs with smoothly mamillated shell, host taxon and geographical origin. Moreover, the new species is the first in the genus to be described with thorny cuticular rings and to be observed with the use of scanning electron microscopy (SEM). The morphology of A. pinnatifidus and A. schubarti is still poorly-known and should be revised in details; however, the separation between them and the new species was clear. Genetic characterization based on 28S rDNA and cytochrome c oxidase subunit I (cox1) mtDNA partial sequences, performed for the first time in Acyracanthus, along with phylogenetic reconstructions using both genetic markers, placed Ancyracanthus electrophori n. sp. in a suggestive basal position within Gnathostomatidae. Phylogenetic reconstructions using cox1 sequences also suggested lack of monophyly in the genera Gnathostoma and Spiroxys and, consequently, in the subfamilies Gnathostominae and Spiroxyinae. However, such results are preliminary. With the first genetic characterization and observations using SEM in Ancyracanthus, resulting in the discovery of a new species and in the expansion of the geographical occurrence of the genus to Amazonian fish, an important step towards a better understanding of these nematodes has been taken.

show abstract

Spiroxys ankarafantsika Roca et Garcia, 2008 (Nematoda: Gnathostomatidae) and Other Nematodes Parasitising Pelusios spp. (Testudines: Pelomedusidae) from South Africa and Mozambique

Cited by 2 publications

References 11 publications

Characterisation of nematode larvae found in a vulnerable native Australian fish, the southern pygmy perch, Nannoperca australis Günther

Characterisation of nematode larvae found in a vulnerable native Australian fish, the southern pygmy perch, Nannoperca australis Günther

Morphological description and molecular characterization of Ancyracanthus electrophori n. sp. (Gnathostomatoidea: Gnathostomatidae): a new nematode parasitic in the electric eel Electrophorus varii (Gymnotiformes: Gymnotidae), from the Brazilian Amazon

Contact Info

Product

Resources

About