Return to Filenchus
Filenchus Andrassy, 1954
Dactylotylenchus (Wu, 1968)
Discotylenchus (Siddiqi, 1980)
Duosulcius (Siddiqi, 1979)
Lambertia (Brzeski, 1977)
Ottolenchus (Husain & Khan, 1965)
Zanenchus (Siddiqi, 1979)
In an extensive review of the genus, Brzeski (1997) noted coverlap of
morphometric data among species and proposed extensive synonymization:
F. cylindricollis and F. plattensis
with F. butteus
F. ditissirnus, F. clarki, F.. rnicrodorus,
F. rnagnus, F zaphari, F. sheri, F. annulatus, F. crassus, F.
parvissirnus, F. neorninirnus and F. arnaritus with
F. aquilonius with F. orbus;
F. helenae and F.
longicaudatulus with F.
F. cerealis with F.
F. cylindricus, F. cylindricaudatus, F.
hageneri, F. japonicus and F. filipjevi with F. thornei
F. mirus, F. cynodontus, F. ruatus, F.
angusticephalus, Basiroides paraobliquus, F. conicephalus and F. brevis
with F. vulgaris.
Dactotylenchus filiformis with
Commonly occurring in most soils.
As an example:
Soil nematodes were studied in three spruce forests in the Czech Republic
from 1988 to 1991. A total of 74 species occurred, most belonged to the
The most abundant nematodes were the mycophytophagous species of the family
Tylenchidae followed by bacteriophages, especially by those in the order
Probably fairly small.
Most reports are about occurrence and abundance rather than documenting any
effects on growth.
Feed on algae, mosses, lichens and plant roots.
Ectoparasites of plant roots, root hairs, algae, etc.
Okada et al (2002 and 2003) have demonstrated that Filenchus misellus
and F. fungivorus are fungal-feeding nematodes and able to reproduce on a range of fungi.
Saprophytic fungi were better hosts than plant-parasitic fungi.
Okada et al (2005) measured population growth rates of three Filenchus
species, when feeding on seven fungal species. On Potato Dextrose Agar and in
soil, populations of Filenchus misellus, Filenchus discrepans and an
unidentified Filenchus sp. increased on saprophytic fungi (Rhizoctonia
solani, Chaetomium globosum, Coprinus cinereus, Flammulina velutipes) but
less well on plant-pathogenic fungi (Fusarium oxysporum, Pythium ultimum).
Apparently, fungal-feeding is not unusual for Filenchus.
Relatively slight, small stylets penetrating only thin cell walls.
Bert, W., Okada, H., Tavernier, I., Borgonie, G.,
Fouthoofd, W. 2010. Morphological, morphometrical and molecular characterisation
of Filenchus fungivorus n. sp., a fungivorous nematode from Japan in a most
likely polyphyletic genus (Nematoda: Tylenchina). Nematology 12:235-246.
Brzeski, M.W. 1997. Redescription of some species of
the genus Filenchus Andrï¿½ssy, 1954 (Nematoda, Tylenchidae). Misc. Zoologica
Geraert, E. 2008. The Tylenchidae of the world: identification of the family
Tylenchidae (Nematoda). Gent, Academia Press: 540 pp
Hanel, Ladislav. 1996. Comparison of soil nematode communities in three
spruce forests Boubin Mount, Czech Republic. Biologia (Bratislava)
Okada, H., Tsukiboshi, T., Kadota ,
I., 2002. Mycetophagy in Filenchus misellus (Andrassy, 1958) Raski
& Geraert, 1987 (Nematoda: Tylenchidae), with notes on its morphology.
Nematology 4, 795-801.
Okada, H., Kadota, I., 2003. Host status of 10 fungal
isolates for two nematode species, Filenchus misellus and Aphelenchus
avenae. Soil Biology and Biochemistry 35, 1601-1607.
Okada, H., Harada, H., Kadota, I. 2005. Fungal-feeding habits
of six nematode isolates in the genus Filenchus. Soil Biol. Biochem 37:
Yeates, G.W., T. Bongers, R.G.M. de Goede, D.W.Freckman and S.S.
Georgieva. 1993. Feeding habits in soil nematode families - an outline for
ecologists. Journal of Nematology 25:315-331.