Volume 6, Part 1 (1998)
Chizhov and D. Sturhan. Description of Deladenus minimus sp.
n. (Tylenchida: Phaenopsitylenchidae), an entomogenous nematode from Germany,
Chizhov and D. Sturhan. Pratinema sepsis gen. n., sp. n. (Tylenchida:
Allantonematidae), a parasite of coprphilous flies of the genus Sepsis
(Diptera: Sepsidae), 5-8
Hunt. and J. Sheldon. SEM studies on the area rugosa
of two species of Brumptaemilius Dollfus, 1952 (Rhigonematida: Carnoyidae),
Eyualem, A. Karegar, H. Nabil and P. De Ley. A redescription and ultrastructure
study of Diploscapter coronatus (Cobb, 1893) Cobb, 1913 from Ethiopia
and Iran, 17-22
Karegar, P. De Ley and E. Geraert. The genera Cervidellus
Thorne, 1937 and Stegelletina Andrassy, 1984 (Nematoda: Cephalobidae)
from Iran, with description of S. kheirii sp. n., 23-36
Baujard, D. Mounport and M.E. Doucet. Scanning electron microscope
observations on Telotylenchinae Siddiqi, 1960 (Nemata: Belonolaimidae).
4. New data on Triversus festonatus (Doucet, 1985) Fortuner &
Luc, 1987, 37-40
Malakhov. Embryological and histological peculiarities of the order
Enoplida, a primitive group of nematodes, 41-46
Perry and J. T. Jones. The use of molecular biology techniques
in Plant Nematology: past, present and future, 47-56
- Abstracts of papers presented at the Second English Language International
Symposium of the Russian Society of Nematologists (Moscow, 23-30 August,
- Book Reviews, 90-92;
and Sturhan, D.
Description of Deladenus minimus sp. n. (Tylenchida:
Phaenopsitylenchidae), an entomogenous nematode from Germany
Descriptions are given of the infective female and the free-living
male of Deladenus minimus sp. n. found in wood samples of Pinus
silvestris L. trunks growing in the vicinity of Braunschweig, Germany.
The new species is distinguished from the seven Deladenus species,
for which the insect parasitic stages are known, by smaller sizes of both
the infective female and the free-living male, a stylet with large and
separated basal knobs and a conoid, pointed tail in the infective female
and a leptoderan bursa in the free-living male.
Key words: Deladenus minimus sp. n., entomogenous nematode,
Germany, morphology, taxonomy
V.N. and Sturhan, D.
Pratinema sepsis gen. n., sp. n. (Tylenchida: Allantonematidae),
a parasite of coprophilous flies of the genus Sepsis (Diptera: Sepsidae)
Pratinema sepsis gen. n., sp. n. is described from coprophilous
flies of the family Sepsidae (Sepsis punctum and Sepsis sp.).
This species can be distinguished from those in the related genus Contortylenchus
by its ventrally curved female body, prominent cuticularization of the
excretory pore and the duct in invasive females, and by the absence of
bursa and a gubernaculum in free-living males. Contortylenchus species
are parasites of bark beetles. The life cycle of Pratinema sepsis
gen. n., sp. n. consists of a single gamogenetic population with copulation
outside of host.
Key words: Allantonematidae, Diptera, Pratinema
sepsis sp. n., Russia, taxonomy, Tylenchida.
and Sheldon, J.
SEM studies on the area rugosa of two species of Brumptaemilius
Dollfus, 1952 (Rhigonematida: Carnoyidae)
SEM studies of the area rugosa of two undescribed species of Brumptaemilius
Dollfus, 1952 collected from the gut of diplopods from Nigeria and South
Africa are compared and contrasted and the value of the area rugosa as
a taxonomic character in the genus discussed. The disposition and form
of the copulatory papillae and the form of the spicules are also commented
upon. A table of the known distribution of the genus in Africa is provided.
Key words: Africa, Brumptaemilius, distribution,
morphology, Nigeria, SEM, South Africa.
Karegar, A., Nabil, H. and De Ley, P.
A redescription and ultrastructural study of Diploscapter
coronatus (Cobb, 1893) Cobb, 1913 from Ethiopia and Iran
Populations of Diploscapter coronatus (Cobb, 1893) Cobb, 1913
are described from Ethiopia and Iran. Scanning electron microscope pictures
of this species and genus are provided for the first time. The lip region
of females bears six labial papillae and lacks cephalic papillae. Both
populations have very prominent annulation between the anus and mid-tail,
a character not mentioned previously in descriptions of Diploscapter
Key words: Diploscapter coronatus, free-living nematodes,
morphology, SEM, taxonomy, tropics.
De Ley, P. and Geraert, E.
The genera Cervidellus Thorne, 1937 and Stegelletina
Andrássy, 1984 (Nematoda: Cephalobidae) from Iran, with description
of S. kheirii sp. n.
One new and one known species of the genus Stegelletina and
three species of the genus Cervidellus were found in soil samples
from Iran. Stegelletina kheirii sp. n. is characterized by its convex-conoid
tail with subacute terminus and by its anterior structure: labial probolae
slender-conical with a single bifurcation, primary axils with single triangular
guarding piece appearing as two refractive U-shaped elements, lip margins
in secondary axils with four pairs of rounded tines, without refractive
elements. S. kheirii sp. n is close to S. similis and S.
devimucronata but differs from both mainly in the shape of the tail
terminus and absence of a U-shaped element in each secondary axil. Scanning
electron microscopic study of C. neftasiensis and C. vexilliger
showed that the extension of the lateral field on the tail and width of
the phasmid opening are variable characters. Stegelletina devimucronata
cancellatus were also found and described here.
Key words: Cephalobidae, Cervidellus, morphology,
SEM, Stegelletina, taxonomy.
Mounport, D. and Doucet, M.E.
Scanning electron microscope observations on Telotylenchinae
Siddiqi, 1960 (Nemata: Belonolaimidae). 4. New data on Triversus festonatus
1985) Fortuner & Luc, 1987.
Scanning electron microscope (SEM) observations on Triversus festonatus
revealed the head morphology to be similar to that observed in two other
species of the genus, Triversus annulatus and Triversus triglyphus.
Preparation of a definitive description of the taxonomic limits of the
genus Triversus requires SEM observations to be made of the two
remaining species in the genus, T. hollisi and T. hyalacus.
Key words: morphology, SEM, Telotylenchinae, Triversus
Embryological and histological
peculiarities of the order Enoplida, a primitive group of nematodes
Unusual features of the order Enoplida have been revealed in recent
years. The type of enoplids embryogenesis differs sharply from all other
nematodes. The cleavage of enoplids is characterized by the variability
of the blastomeres arrangement. No strict determination of blastomeres
has been revealed in the development of enoplids. Unlike in other nematodes,
the bilateral symmetry appears late in the emryogenesis of enoplids. Enoplids
do not have eutely which is considered to be a characteristic feature of
nematodes. Enoplids are able to regenerate experimentally destroyed internal
organs if the cuticle was not disrupted. These features suggest that enoplids
are possibly more primitive than other nematode taxa.
Key words: cell-lineage, embryogenesis, Enoplida, eutely,
Perry, R.N. and Jones, J. T.
The use of molecular biology techniques in Plant Nematology:
past, present and future
Aspects of the use of molecular biology techniques in three areas of
Plant Nematology (molecular taxonomy and diagnostics, genetic engineering
for resistance and gene identification and function) are presented. Selected
examples are used to illustrate the expansion of research in these areas
and, especially, to indicate the priorities and possible future developments
for molecular biology studies of plant-parasitic nematodes. Emphasis is
placed on the need for novel control strategies based on genetic engineering
for resistance, the desirability of using information from
elegans research and the need for an integrated approach with physiologists
and biochemists to determine gene function.
Key words: C. elegans, diagnostics, gene identification,
molecular biology, plant-parasitic nematodes, resistance.