چکیده
|
A new species of the genus Talanema, recovered from the northwest
of Iran, was described based on morphological, morphometric, and
molecular data. Talanema eshtiaghii sp. n. was characterized by its
1.45-1.68 mm long body, lip region offset by constriction and 13-15
μm wide, odontostyle 15-18 μm long, double guiding ring, neck 312-
362 μm long, pharyngeal expansion occupying 41-43% of the total
neck length, uterus tripartite, and 111-189 μm long or 2.1-3.2 body
diameters, vulva transverse (V = 55-58), tail similar in both sexes,
conical with a dorsal concavity (30-44 μm, c = 33-56, c’ = 1.0-1.6),
spicules 49-56 μm long, and 14-18 shortly spaced ventromedian
supplements in front of the level of the anterior end of spicules, with
distinct hiatus. It was compared to four closely similar species, with
emphasis on the most relevant traits to distinguish them. Molecular
phylogenetic studies using partial sequence of the 28S rDNA (D2-
D3 segment) revealed that the new species forms a clade with
other currently sequenced representatives of Talanema, tentatively
supporting the monophyly of this genus.
|