Abstract:
Three species belonging to three genera of the fami
ly Tylenchidae, namely,
Cephalenchus leptus
,
Eutylenchus excretorius,
and
Lelenchus leptosoma
were discovered as
first reports for Iran's nematode fauna. They were
characterized by morphological,
morphometric
and molecular phylogenetic studies. The two latter
genera are new for
Iran. Iranian population of
Cephalenchus leptus
is characterized by lateral field with six
lines in females, stylet length of 16-20 μm and tai
l length of 153-290 μm with pointed tip.
The recovered population of
Eutylenchus excretorius
is characterized by 848-1,038 μm
long females’ body, stylet length of 20.0-21.5 μm,
having advulval flaps and absence of
male. The Iranian population of
Lelenchus leptosoma
is defined by its narrow slender
body, flattened lip region, sinuous amphidial openi
ng and absence of lateral field. The
phylogenetic relationships of the three recovered s
pecies were studied using the partial
sequences of 28S rDNA D2/D3 segment and revealed th
e genera
Cephalenchus
and
Eutylenchus
forming a monophyletic clade, while,
Lelenchus
was placed inside the clade
of currently sequenced species of
Malenchus
in Bayesian tree.
Keywords:
Morphometric, Nematode, Northern Iran forests, Phy
logeny, Sabalan region,
Taxonomy.
