Volume 8, Part 1 (2000)
- H.
Braasch and H. Schmutzenhofer. Bursaphelenchus abietinus sp.
n. (Nematoda: Parasitaphelenchidae) associated with fir bark beetles (Pityokteines
spp.) from declining silver fir trees in Austria, 1-6
- W.M.
Wouts. The subgenus Nothocriconemella Ebsary, 1981 (Nematoda:
Criconematidae), with the description of four new species from New Zealand, 7-31
- Pham
Van Luc, K.B. Nguyen, A.P. Reid and S.E. Spiridonov. Steinernema
tami sp. n. (Rhabditida: Steinernematidae) from Cat Tien Forest, Vietnam,
33-43
- O.V.
Slobodyanyuk. Revision of the species Psyllotylenchus pawlowskyi
(Kurochkin, 1960) Poinar & Nelson, 1973. III. Description of Spilotylenchus
ivashkini sp. n., 45-55
- E.S.
Ivanova and W.D. Hope. Two new species of Ungella Cobb, 1928
(Rhabditida: Drilonematoidea) from earthworms deposited in the Smithsonian
Institution Natural History Museum, 57-64
- F.
Lamberti, S. Molinari, M. Moens and D.J.F. Brown. The Xiphinema
americanum group. I. Putative species, their geographical occurrence
and distribution, and regional polytomous identification keys for the group, 65-84
- Abstracts of papers presented at the Third English Language International
Symposium of the Russian Society of Nematologists (St. Petersburg, 21-27
August 1999), 85-103
- Book Reviews, 104-108
Braasch, H.
and Schmutzenhofer, H.
Bursaphelenchus abietinus sp. n. (Nematoda: Parasitaphelenchidae)
associated with fir bark beetles (Pityokteines spp.) from declining
silver fir trees in Austria
Summary:
During 1997 and 1998, specimens of an undescribed Bursaphelenchus
species were recovered from approximately 33 to 50% of each of a hundred
Pityokteines
spinidens, P. vorontzowi and P. curvidens (Coleoptera,
Scolytidae) fir bark beetles collected in the Bludenz region, Austria.
Bursaphelenchus abietinus sp. n., is relatively small (L = 594 to
632 µm in males and females, respectively) with a delicate stylet
(12 to 13 µm), a low 'a ' value (28 to 29), small spicules (13 µm),
and a small bursa shaped like a two or three pointed shovel on the tail
end. The moderately bent spicules have a narrow, high condylus and a blunt
rostrum. Bursaphelenchus abietinus sp. n. is most similar to B.
corneolus, B. wilfordi, B. hylobianum, B. fungivorus
and B. hellenicus from which it differs by having differently shaped
spicules and female tail terminus, relatively short post-uterine branch,
morphometrics and from B. hellenicus by the number of caudal papillae.
Key words: Abies alba, Austria, Bursaphelenchus
abietinus sp. n., Pityokteines curvidens, P. spinidens, P. vorontzowi,
taxonomy
Wouts, W. M.
The subgenus Nothocriconemella Ebsary, 1981
(Nematoda: Criconematidae), with the description of four new species from
New Zealand
Summary:
In the genus Criconema, the subgenus Nothocriconemella
is discussed and redefined. The following species are recorded for New
Zealand: C. (N.) acuticaudatum, C. (N.) alpinum, C. (N.) californicum,
C. (N.) graminicola, C. (N.) macilentum, C. (N.) mutabile, C. (N.) pasticum
and C. (N.) sphagni. A short description of each of these is given.
Criconema
(N.) macilentum is redescribed from a population from Auckland Island.
Four new species are described and illustrated: C. (N.) crosbyi
sp. n. from Campbell Island; C. (N.) farrelli sp. n. from Auckland
Islands, and C. (N.) dugdalei sp. n. from high altitude, and C.
(N.) ramsayi sp. n. from sea level, in the South Island. The basal
part of the stylet, the lip and postvulval regions of these species are
illustrated and compared, and a key to the species is presented.
Key words: Criconema, nematodes, new species, New Zealand,
Nothocriconemella
Pham Van Luc,
Nguyen,K. B., Reid, A. P. and Spiridonov, S. E.
Steinernema tami sp. n. (Rhabditida: Steinernematidae)
from Cat Tien Forest, Vietnam
Summary:
Steinernema tami sp. n. from Cat Tien Forest, Vietnam has characteristics
of species in the ìcarpocapsaeî group (IJ3 body length < 600
µm). It can be distinguished from species in this group by the mean
IJ3 body length (530 µm ), which is shorter than that of S. kushidai,
S. scapterisci, S. carpocapsae, and S. abbasi (589, 572, 558,
and 541 µm) but longer than that of S. rarum, S. ritteri, and
S. siamkayai (511, 510, and 446 µm). In the male, the spicule
of the new species (77 µm ) is shorter than that of S. scapterisci
(83 µm) but longer than that of all other species in the group (<
75 µm); ratio SW (spicule length/anal body width) of the first generation
male (2.0) is smaller than that of S. scapterisci (2.5) but greater
than that of other species (< 1.8). Steinernema tami sp. n. is
further differentiated from other species in the group by the profiles
of at least 3-4 enzymes in rDNA-RFLP analysis.
Key words: "carpocapse" group, entomopathogenic nematodes,
South East Asia, Steinernema tami sp. n., taxonomy, Vietnam
Slobodyanyuk,
O. V.
Revision of the species Psyllotylenchus pawlowskyi
(Kurochkin, 1960) Poinar & Nelson, 1973. III. Description of Spilotylenchus
ivashkini sp. n.
Summary:
A description of the morphology and life cycle of the nematode Spilotylenchus
ivashkini sp. n. is given. The species is established as a result of
a revision of Psyllotylenchus pawlowskyi (Kurochkin, 1960) Poinar
& Nelson, 1973, a parasite of Coptopsylla lamellifer and Nosopsyllus
laeviceps fleas, which was described from specimens representing three
separate species (Spilotylenchus pawlowskyi (Kurochkin, 1960) partim
Slobodyanyuk, 1997 that parasitises only Coptopsylla lamellifer
fleas and Kurochkinitylenchus laevicepsi (Slobodyanyuk, 1999) and
Spilotylenchus
ivashkini sp. n., each of which parasitise Nosopsyllus laeviceps
fleas). The new species can be distinguished from S. pawlowskyi
by body length and the position of the excretory pore in the parasitic
female, by body shape and tail shape in juveniles from the host coelom
and from the environment, and by the host insect. From all other spilotylenchs,
including S. pawlowskyi, the new species differs by the shape of
the parasitic female stylet.
Key words: biology, fleas, morphology, Spilotylenchus
ivashkini sp. n.
Ivanova, E.S and Hope, W.D.
Two new species of Ungella Cobb, 1928
(Rhabditida: Drilonematoidea) from earthworms deposited in the Smithsonian
Institution Natural History Museum
Summary:
Two new species of Ungella Cobb, 1928 are described from earthworms
deposited in the collection of the Smithonian Institution Natural History
Museum. Ungella burmensis sp. n. is distinguished from U. secta Cobb, 1928 by
having finely mammilated egg shells, smaller gubernaculum and more numerous pre-cloacal
pappillae. Ungella mexicana sp. n. differs from other species in the genus by
having bifurcated spicule termini. The presence and absence of spicular
apparatus within the ungellid genera is discussed.
Key words: Drilonematidae, earthworm parasites,
Ungellidae, Ungella burmensis sp. n., Ungella mexicana sp. n.
Lamberti, F. Molinari, S., Moens, M. and Brown, D.J.F.
The Xiphinema
americanum group. I. Putative species, their geographical occurrence
and distribution, and regional polytomous identification keys for the group
Summary:
Problems associated with identification of species attributed to the Xiphinema
americanum group are reviewed to provide a "benchmark" for a
European Economic Union funded research collaboration. The principal objective
of the research is to establish a definitive morphological and molecular scheme
for detection and diagnosis of virus-vector nematodes in the group. Forty-nine
putative species are included in the group, together with two species considered
species inquirendae. Information and comments on the geographical
occurrence and distribution of each is provided. Those species for which there
is unequivocal evidence of the nematode's ability to transmit viruses are
listed, together with those species that have been reported to have three or
four juvenile stages. A series of polytomous identification keys is provided as
a practical means for establishing a preliminary identification of X.
americanum group nematodes occuring in the major geographical areas. The
identification keys are provided in the expectation that researchers world-wide
will provide constructive comment for improvement with the objective of finally
establishing a practical, definitive morphological identification
key. Key words: distribution, European
Economic Union, nematodes, polytomous keys, quarantine organisms, virus-vectors,
Xiphinema americanum group.
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