Morphological characterisation of three isolates of Heterorhabditis Poinar, 1976 from the 'Irish group' (Nematoda

Rhabditida: Heterorhabditidae) and additional evidence supporting their recognition as a distinct species, H. downesi n. sp.

S Patricia Stock, Christine T. Griffin, Ann M. Burnell

Research output: Contribution to journalArticle

37 Citations (Scopus)

Abstract

The morphological variation of three representative isolates of the 'Irish group' of Heterorhabditis was examined. First generation hermaphrodites were characterised by having a blunt and mucronate tail. Females (second generation) and third-stage infective juveniles were also distinguished by the morphology of the tail and the presence of a refractile projection in the tail tip. Males were characterised by the position of the excretory pore and by the value of ratio SW. These morphological features do not fit the description of currently recognised Heterorhabditis species, and provide additional evidence in support for the consideration of the Irish group as a new species. A description of this species, as H. downesi n. sp., is provided.

Original languageEnglish (US)
Pages (from-to)95-106
Number of pages12
JournalSystematic Parasitology
Volume51
Issue number2
DOIs
StatePublished - 2002

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Rhabditida
Heterorhabditidae
Heterorhabditis
Nematoda
Tail
tail
nematode larvae
new species

ASJC Scopus subject areas

  • Agricultural and Biological Sciences(all)
  • Parasitology

Cite this

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title = "Morphological characterisation of three isolates of Heterorhabditis Poinar, 1976 from the 'Irish group' (Nematoda: Rhabditida: Heterorhabditidae) and additional evidence supporting their recognition as a distinct species, H. downesi n. sp.",
abstract = "The morphological variation of three representative isolates of the 'Irish group' of Heterorhabditis was examined. First generation hermaphrodites were characterised by having a blunt and mucronate tail. Females (second generation) and third-stage infective juveniles were also distinguished by the morphology of the tail and the presence of a refractile projection in the tail tip. Males were characterised by the position of the excretory pore and by the value of ratio SW. These morphological features do not fit the description of currently recognised Heterorhabditis species, and provide additional evidence in support for the consideration of the Irish group as a new species. A description of this species, as H. downesi n. sp., is provided.",
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