Redescription and molecular characterisation of Dujardinascaris madagascariensis and a note on D. dujardini (Nematoda: Heterocheilidae), parasites of Crocodylus niloticus, with a key to Dujardinascaris spp. in crocodilians
Language English Country New Zealand Media electronic
Document type Journal Article, Research Support, Non-U.S. Gov't
PubMed
25544522
DOI
10.11646/zootaxa.3893.2.6
PII: zootaxa.3893.2.6
Knihovny.cz E-resources
- MeSH
- Alligators and Crocodiles parasitology MeSH
- Animal Structures anatomy & histology growth & development MeSH
- Phylogeny MeSH
- Nematoda anatomy & histology classification genetics growth & development MeSH
- DNA, Ribosomal Spacer genetics MeSH
- Nematode Infections parasitology veterinary MeSH
- Animal Distribution MeSH
- Organ Size MeSH
- Body Size MeSH
- Animals MeSH
- Check Tag
- Male MeSH
- Female MeSH
- Animals MeSH
- Publication type
- Journal Article MeSH
- Research Support, Non-U.S. Gov't MeSH
- Geographicals
- Kenya MeSH
- Names of Substances
- DNA, Ribosomal Spacer MeSH
An examination of one specimen of Nile crocodile, Crocodylus niloticus (Laurenti, 1768), from Lake Turkana (Kenya), revealed the presence of two ascaridoid nematodes belonging to the genus Dujardinascaris Baylis, 1947. Dujardinascaris madagascariensis Chabaud & Caballero, 1966 was studied by scanning electron microscopy, redescribed, and differentiated from D. dujardini (Travassos, 1920). Dujardinascaris madagascariencsis is the second of the genus to be sequenced. An internal fragment of the small ribosomal subunit and nuclear ribosomal DNA internal transcribed spacer 2 region were amplified--the slowly evolving 18S gene region was used for phylogenetic analysis. Molecular data confirmed affinity of D. madagascariensis to the family Heterocheilidae and revealed its closest relationship with D. waltoni. A key to the species of Dujardinascaris parasitizing crocodiles is provided.
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