Trichodorus iranicus Pedram & Pourjam, 2014, sp. n.
Creators: name: Pedram, Majid
name: Pourjam, Ebrahim
Publisher: name: Zenodo
Year: 2014
Subjects: Biodiversity
Taxonomy
Animalia
Nematoda
Adenophorea
Triplonchida
Trichodoridae
Trichodorus
Trichodorus iranicus

description: Trichodorus iranicus sp. n.
(Figs 1–3)
Measurements. Table 2.
Male: Body cylindrical, tapering very slightly anteriorly, J-shaped after heat relaxation. Cuticle moderately swollen, 2–3 µm thick at onchiostyle region and 3 µm thick at mid-body and at anterior lip of anus. Lip region rounded, 8–9 µm wide. Amphidial fovea cup-shaped, its opening a wide slit. Stoma with refractive strengthening rods, approximately 5 µm long. Pharyngostom 42.5% of pharynx length, onchiostyle well developed, curved, onchium fine, 17–18 µm long, onchiophore well sclerotized, guiding ring at 3.5 times lip region width from anterior end. Pharynx composed of two parts: anterior slender part expanding gradually to form an offset terminal bulb, 20 µm wide×50 µm long, within which the dorsal gland nucleus and posterior pair of ventrosublateral nuclei are clearly visible, while the anterior pair of ventrosublateral nuclei are much smaller and more difficult to discern. Cardia slightly to moderately developed. Nerve ring 7.5–11.5 µm posterior to the base of pharyngostom. Three distinct cervical papillae present, the anteriormost (CP1) located at about 50–60% of pharyngostom length, the second papilla (CP2) at ca. 5 µm anterior (in paratype male) or posterior (holotype) to the pharyngostom base and the third papilla (CP3) at or slightly posterior to the middle of the isthmus. Secretory-excretory pore at 13.5–16.0 µm posterior to CP3, opposite the isthmus. Reproductive system monorchic, sperm cells with large sausage-shaped nuclei, spicules ventrally curved, slightly sclerotized, their proximal part widened with slightly developed capitulum, middle part indented and provided with a few bristles (two dorsal and two on ventral side in holotype), gubernaculum short. Three precloacal supplements (SP), with the posteriormost (SP1) located anterior to the proximal end of the spicules. Tail rounded, its length less than one body width at cloacal region, one pair of small postcloacal subventral papillae situated just posterior to the cloacal opening, subventral pair of caudal pores at a short distance from them. Hyaline part of tail 7–9 µm thick.
Female: Body straight, cigar-like. General morphology similar to that of male, except for the reproductive system, and with the posterior body region not ventrally curved. Excretory pore opposite isthmus. Anterior and posterior genital tracts of more or less equal length, each with a spermatheca containing sperm cells near the oviduct at the reflexed tip of the ovary. Morphology of sperm cells similar to mature sperm in genital tract of the male. Vagina well developed, 46–57% of corresponding body width in length, pars proximalis vaginae more or less rhomboid, pars refringens vaginae triangular to rounded-triangular, medium sized (ca. 3.5 µm), 1–2 µm apart from each other; vulva a transverse slit in ventral view. One female with copulatory plug at vulva-vagina level.
Post-advulval body pore 33 µm (n=1) posterior to vulva. Tail short, 3–5 µm in length, and rounded. Caudal pores subventral, just posterior to anus.
Juveniles: Some damaged juveniles were found, but were in poor condition and not suitable for morphological study.
Code, using the polytomous identification key of Decraemer & Baujard (1998):
For male: A = 222 (mean, min, max), B = 22, C = 11, D = 33, E = 12, F = 3, G = 0, H = 20, I = 11, J = 500, K = 33, L = 44, M = 160, N = 11, O = 1, P = 2; for female: A = 200, B = 22, C = 1, D = 1, E = 200, F = 100, G = 2, H = 22, I = 23, J = 11, K = 400, L = 22, M = 1, N = 2, O = 11, P = 11, Q = 1, R = 1, S = 7.
Type habitat and localit y. Soil samples collected from the rhizosphere of grasses in forests of Golestan province, GPS coordinates: N36°34.942, E051°49.166.
Type material. Holotype male and three paratype females deposited in the Nematode Collection of the Faculty of Agriculture, Tarbiat Modares University, Tehran, Iran. One paratype male and two females in the USDA Nematode Collection, Beltsville, MD, USA.
description: Published as part of Pedram, Majid & Pourjam, Ebrahim, 2014, Description of Trichodorus iranicus sp. n. (Diphtherophorina, Trichodoridae) from Iran, pp. 431-440 in Zootaxa 3795 (4) on pages 433-435, DOI: 10.11646/zootaxa.3795.4.3, http://zenodo.org/record/226996