Heterorhabditis noenieputensis n. sp. (Rhabditida: Heterorhabditidae), a new entomopathogenic nematode from South Africa
Date
2012-12
Authors
Malan, Antoinette P.
Knoetze, R.
Tiedt, L.
Journal Title
Journal ISSN
Volume Title
Publisher
Cambridge University Press - CUP
Abstract
A new entomopathogenic nematode in the genus Heterorhabditis is described
from South Africa, from two singular isolates found 1000km from each other,
from beneath a fig tree and in a citrus orchard, respectively. Morphological and
molecular studies indicate both isolates to be the same and a new undescribed
Heterorhabditis species. Comparison of sequences of the internal transcribed
spacer (ITS) rDNA and the D2D3 region of the 28S rDNA gene with available
sequences of other described species within the genus, indicate the two isolates
as a new species. Phylogenetic analysis of the sequence data concerned placed
the new species, H. noenieputensis n. sp., closest to H. indica and H. gerrardi in the
indica-group. The new species, H. noenieputensis n. sp., is distinguished from
other species in the genus by a combination of several morphological traits of the
males and the infective juveniles (IJs). The new species differs from all other
species previously described, as regards the body length of the IJs, except for
H. indica and H. taysearae, in which the IJ is smaller. The IJ also differs from that of
H. indica in the length of the oesophagus, the body diameter, the length of the tail
and the E%. In addition, males of H. noenieputensis n. sp. differ from their closest
relative, H. indica, in the position of the excretory pore, SW% and D%; and from
H. gerrardi in the length of the oesophagus and SW%. The seventh pair of genital
papillae of H. noenieputensis n. sp. are normally developed, while for H. indica
they are often branched or swollen at the base, while 8 and 9 are usually absent in
both species.
Description
The original publication is available at http://journals.cambridge.org/action/displayJournal?jid=JHL
Keywords
Entomopathogenic nematode -- Pest control agents -- South Africa, Heterorhabditis -- Phylogenetic analysis, Rhabditida
Citation
Malan, A. P., Knoetze, R. & Tiedt, L. 2012. Heterorhabditis noenieputensis n. sp. (Rhabditida: Heterorhabditidae), a new entomopathogenic nematode from South Africa, Journal of Helminthology :1-13, FirstViewArticles, doi:10.1017/S0022149X12000806.