Volume 4, Part 2 (1996)
of two new species of Tricoma (Nematoda: Desmoscolecidae) and comments
on the taxonomic status of T. (T.) tertia Blome, 1982 and T.
(T.) brevirostris (Southern, 1914) Steiner, 1916, 107-114
& A.V. Tchesunov. Some Desmoscolecids from the White Sea (Nematoda:
& V.N. Chizhov. Ultrastructure of the integument of parasitic
females in entomogenous tylenchids. II. Howardula phyllotretae,
Parasitylenchus dispar, Contortylenchus sp., and two allantonematid species,
P. Cadet & S.B. N'Diaye. Longidorus brevis sp. n. (Nematoda:
Longidoridae) from Senegal, West Africa, 139-143
W. F. Chiu, C. Yu, C. Li & R. T. Robbins. The occurrence and
geographical distribution of longidorid and trichodorid nematodes associated
with vineyards and orchards in China, 145-153
& O. A. Kulinich. A taxonomic appraisal of the original description,
morphology and status of Bursaphelenchus kolymensis Korentchenko,
1980 (Aphelenchida: Aphelenchoididae), 155-161
Robbins, D. J. F. Brown, J. M. Halbrendt & T. C. Vrain. Compendium
of juvenile stages of Xiphinema species (Nematoda: Longidoridae), 163-171
& R. Pena Santiago. Nematodes of the order Dorylaimida from
Andalucia Oriental, Spain. The genus Mesodorylaimus Andrassy, 1959.
I. Two short-tailed new species, 173-180.
L. A. Guskova & H. Al-Bakkur. An assessment of resistance in glasshouse-grown
tomato cultivars to Meloidogyne incognita, race 2, from Latvia and to M.
javanica from Russia, 181-183
V. N. Chizhov. Phoresia of Nigolaimoides borbophilus (Nematoda:
Dorylaimida) by scatobiotic dipterans, 185-186
E. Tzortzakakis & D.J.F. Brown. The absence of a tail mucro in Xiphinema
index (Nematoda: Longidoridae) appears not to be an inherited
Newsletter of the Russian Society of Nematologists
Descriptions of two new species of Tricoma (Nematoda:
Desmoscolecidae) and comments on the taxonomic status of T. (T.) tertia
Blome, 1982 andT. (T.) brevirostris (Southern, 1914) Steiner,
A study of type material of Tricoma (Tricoma) tertia Blome,
1982 revealed a mixture of two species: T. (T.) tertia and an unidentified
(Tricoma) species. Tricoma (Tricoma) tertia , currently known
by the male holotype and one female paratype, is redescribed and the second
species is described as Tricoma (Tricoma) blomei sp. n. Tricoma
(Tricoma) brevirostris (Southern, 1914) Steiner, 1916 is reviewed.
Tricoma brevirostris and T. euxenica are considered species
inquirendae and T. brevirostris in Decraemer (1978, 1984) is here
described as T. (T.) parabrevirostris , a new species.
Key words: Tricoma (Tricoma) tertia, T. (T.) blomei sp.
n., T. (T.) parabrevirostris sp. n.
W. and Tchesunov, A.V.
Some Desmoscolecids from the White Sea (Nematoda: Desmoscolecida).
Thirty samples, mainly from the sublittoral zone from several localities
of in the Velikaja Salma Strait, Kandalaksha Bay, White Sea contained a
relatively high species diversity of the family Desmoscolecidae, but a
low representation per species. Four species, new to science are described.
paracomecapitata sp. n. characterized by an annulated body cuticle
with 97-112 annuli, ornamented with tubular and hair-like projections and
a lateral differentiation with hair-like setae only, two types of somatic
setae: short setae with fine end and long stout setae with sucker-like
end and in male by the length of the spicules (36 Ám);
albimaris sp. n. by a high number of main body rings (greater than
100), a somatic setal pattern with 10-12 subdorsal setae and 19-25 (male)/19-22
(female) subventral setae, broad triangular head shape, and in male by
the shape of the gubernaculum with thick-walled apophyses; T. (T.) paracapitata sp.
n. by a small body with 76-77 main rings, narrow triangular head shape
in lateral view, somatic setal pattern with 9-10 subdorsal and 19-20 subventral
setae, fine spicules with knob-like manubrium and the presence of two medioventral
genital setae in male and Desmoscolex (Desmoscolex) paragranulatus
sp. n. by a short body, a typical desmoscolecoid setal pattern, a broad
head largely covered by the amphids which reach far anteriorly, presence
of a concentration of pigment granules and in male by the 36 Ám long, curved
spicules. Additional data are given on Tricoma (Tricoma) similis
Cobb, 1912, Desmoscolex (Desmoscolex) labiosus Lorenzen, 1969 and
(D.) petaloides Lorenzen, 1972 found for the first time in the White
Key words: Desmoscolecida, White Sea, taxonomy.
S.A. and Chizhov, V.N.
Ultrastructure of the integument of parasitic females
in entomogenous tylenchids. II. Howardula phyllotretae, Parasitylenchus
dispar,Contortylenchus sp., and two allantonematid species.
The structure of the body walls of parasitic females in five species
of entomogenous nematodes was studied using transmission and scanning electron
microscopy. The body surface of parasitic females in H. phyllotretae
is covered by short microvilli. Numerous ampullae, invaginations of the
outer hypodermal membrane, are situated beneath the surface of parasitic
females of all studied species except those of Contortylenchus sp.,
which were characterized by a thick covering layer of extracellular material.
It is suggested that the network of ampullae and vacuoles are involved
in the assimilation and subsequent transmission of nutrients from the nematode
surface to underlying tissues.
Key words: hypodermis, entomogenous nematodes, Howardula
phyllotretae, Parasitylenchus dispar, Contortylenchus sp., Allantonematidae,
Cadet, P. and N'Diaye, S.B.
Longidorus brevis sp. n. (Nematoda: Longidoridae) from
Senegal, West Africa
Longidorus brevis sp. n. is described from the rhizosphere of
senegalensis , Pennisetum pedicellatum , Cordyla pinnata and Blumea
aurita in Senegal. It is a small longidorid, morphologically resembling
L. juveniloides , L. juvenilis , L. reneyii and L. laevicapitatus.
The new species can be distinguished from these species by combinations
of the following characters: short, thick body (L = 1.71-2.13 mm and a
= 54.2-68.9), short odontostyle (40-43 Ám), lobed amphidial pouches, distance
of guide ring from anterior end (23-25.5 Ám) and an elongate conoid tail
with a slightly digitated terminus (c'= 1.89-2.61).
Key words: Senegal, Longidorus brevis sp. n.,
new species, SEM.
Chiu, W. F., Yu, C., Li, C. and Robbins, R. T.
The occurrence and geographical distribution of longidorid
and trichodorid nematodes associated with plantations and orchards in China
To investigate the occurrence and geographical distribution of Longidoridae
and Trichodoridae nematodes, several species of which are capable of transmitting
plant viruses, a total of 1239 soil samples were collected from 165 orchards
and vineyards in 22 provinces of China. Sixteen species belonging to four
genera were identified: Longidorus macromucronatus Siddiqi, 1962;
martini Merny, 1966; L. moniloides Heyns, 1966; Paratrichodorus
porosus (Allen, 1957) Siddiqi, 1974; Trichodorus kurumeensis Yokoo,
1966; T. nanjingensis Liu & Cheng, 1990; Xiphinema diffusum
Lamberti & Bleve-Zacheo, 1979; X. elongatum Stekhoven &
Teunissen, 1938; X. incognitum Lamberti & Bleve-Zacheo, 1979;
insigne Loos, 1949; X. luci Lamberti & Bleve-Zacheo, 1979;
X. radicicola Goodey, 1936; X. taylori Lamberti et al., 1991;
X. thornei Lamberti & Bleve-Zacheo, 1986; and two putative Xiphinema
: X. sp. 1 and X. sp. 2. The most frequently occurring species
were X. thornei , X. diffusum and X. incognitum each of which
are members of the X. americanum -group
Key words: Longidorus, orchards, Paratrichodorus,
Trichodorus, vineyards, virus-vector, Xiphinema.
C. and Kulinich, O.A.
A taxonomic appraisal of the original description,
morphology and status of Bursaphelenchus kolymensis Korentchenko,
1980 (Aphelenchida: Aphelenchoididae)
The taxonomic status of Bursaphelenchus kolymensis , a member
of the pinewood nematode species complex (PWNSC) is unclear. Examination
of the type specimens of B. kolymensis Korentchenko, 1980 revealed
that the male has a broad beak- or spade-shaped bursa in lateral view and
cucullus on the spicule. The female has a sub-cylindrical tail with a slender
mucro. Comparison with related PWNSC species indicates that B. kolymensis
is morphologically similar to B. fraudulentus Rhm, 1956 and B.
mucronatus Mamiya & Enda, 1979, but distinct from B. xylophilus
(Steiner & Buhrer, 1934) Nickle, 1970. Bursaphelenchus kolymensis
differs from B. fraudulentus by possessing a more slender mucro,
a broad beak- or spade-shaped bursa and by having coniferous hosts. It
is most similar to B. mucronatus populations from Russia and France,
but differs from Japanese populations by its sub-cylindrical female tail
and slender mucro, and the shape of the bursa. It is concluded that mating
and genetic studies are required to resolve the specific status of B.
Key words: Bursaphelenchus kolymensis, morphology,
xylophilus, B. mucronatus, B. fraudulentus.
Robbins, R.T., Brown, D.J.F, Halbrendt, J.M.
and Vrain, T.C.
Compendium of juvenile stages of Xiphinema species
An examination of descriptions and redescriptions of Xiphinema
species, and selected publications, yielded information describing juvenile
developmental stages for only 114 of the 220 putative species comprising
the genus. One juvenile developmental stage was described for each of 13
species; two stages for each of 21 species; three stages for each of 17
species; and four stages for each of 63 species. Excessive overlap in the
morphometric data, or seemingly abnormal size ranges, reported for juveniles
of several of these species prevents unequivocal determination to be made
of the number of developmental stages. However, unequivocal evidence is
available for X. americanum sensu stricto , X. californicum ,
X. chambersi , X. hygrophilum and X. rivesi to consider these
species as having only three, instead of four, juvenile developmental stages.
The characteristics used to identify the first developmental stage is explained,
as is identification of the pre-adult developmental stage. Accurate determination
of the number of juvenile developmental stages is important to the basic
understanding of the taxonomy and biology of Xiphinema nematodes and of practical
significance when distinguishing similar species, especially those species
which transmit virus.
Key words: identification, juvenile stages, development,
J. and Pena Santiago, R.
Nematodes of the order Dorylaimida from Andalucia Oriental,
Spain. The genus Mesodorylaimus Andrassy, 1959. I. Two short-tailed
Two new species belonging to the genus Mesodorylaimus Andrassy,
1959 are described from specimens collected from the rhizosphere of wild
plant communities in southeastern Spain. Mesodorylaimus brevicaudatus
n. is characterized by its medium size (L=1.3-1.6 mm) body, lip region
set-off by depression, odontostyle 11-14 Ám long or almost equal to the
lip region width, V=50-57%, female tail conical, digitate (25-37.5 Ám, c=38-61,
c'=0.9-1.4), spicules 46.5-54 Ám and 6-9 regularly spaced ventromedian supple-
ments. Mesodorylaimus pseudorecurvus sp. n. is characterized by
its medium sized (L=1.1-1.3 mm) body, lip region set- off by a weak depression,
odontostyle 10-11 Ám long, V=51.8-53.2%, presence of irregularities of the
cuticle near the vulva, and tail conical, elongate (35.5-43.5 Ám, c=28.6-34.3,
c'=1.6-2.0) with the posterior half cylindrical and dorsally bent. Both
species are illustrated and tables of morphometrics are given.
Key words: Mesodorylaimus brevicaudatus sp. n.,
Mesodorylaimus pseudorecurvus sp. n., Spain.