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

0439437 - BC 2015 RIV NZ eng J - Journal Article
Mašová, Š. - Baruš, V. - Seifertová, M. - Malala, J. O. - Jirků, Miloslav
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.
Zootaxa. Roč. 3893, č. 3 (2014), s. 261-276. ISSN 1175-5326. E-ISSN 1175-5334
R&D Projects: GA ČR GBP505/12/G112
Institutional support: RVO:60077344
Keywords : Lake Turkana * Omo River delta * Kenya * Africa * bar-coding * 18S rDNA * ITS2
Subject RIV: EG - Zoology
Impact factor: 0.906, year: 2014

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 ujardinascaris 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.
Permanent Link: http://hdl.handle.net/11104/0242712