Description of Crassolabium persicum sp. n. (Nematoda, Dorylaimida, Qudsianematidae), an interesting species from Iran

Abstract

A new species of the genus Crassolabium, Crassolabium persicum sp. n., collected from Arasbaran rangelands of Iran, is described and illustrated. It is characterized by its body 1.92–2.40 mm long, lip region offset by constriction and 17–19 μm wide, odontostyle 16–19 μm long with aperture occupying less than one–third (27–30%) its length, neck 428–690 μm long, pharyngeal expansion 369–390 μm long or occupying 54–56% of total neck length, female genital system amphidelphic, uterus bipartite and 162–218 μm long or 2.3–3.5 times as long as body diameter, pars refringens vaginae well developed, V = 54–57.5, vulva longitudinal, prerectum bearing a blind sac, tail conical with rounded tip to conoid (25–36 μm, c=60–69, c’=0.5–0.9), spicules 68–72 μm long, precloacal pair of supplements far (22–27 μm) from cloacal aperture, and 13–17 shortly spaced ventromedian supplements with hiatus. The new taxon is compared in depth to its relatives in Crassolabium as well as other similar species of Aporcelaimellus and Amblydorylaimus.

New data on two remarkable Antarctic species Amblydorylaimus isokaryon (Loof, 1975) Andrássy, 1998 and Pararhyssocolpus paradoxus (Loof, 1975), gen. n., comb. n. (Nematoda, Dorylaimida)

“…Related to the cuticle structure, it should be mentioned that genus Aporcelinus has three layered cuticle with inner refractive layer, well visible on several photomicrographs (Figs 4E , 8A–C ) presented by Vinciguerra et al (2014) . Further, the location of adcloacal pair of male ventromedian papillae (comparatively far from cloaca opening) in Amblydorylaimus isokaryon shows some similarity to Crassolabium persicum Jabbari, Niknam, Vinciguerra, Moslehi, Abolafia & Peña-Santiago, 2012, but the latter species differs from it by the odontostyle structure (weakly sclerotised vs quite robust), not differentiated vs bipartite uterus, structure of pars distalis (without differentiation vs with two small sclerotisations close to the pars refringens in Crassolabium persicum ) ( Jabbari et al 2012 ).…”

Metaxonchium persicum sp. n. from Iran (Nematoda, Dorylaimida, Belondiridae), with an updated taxonomy of the genus

“…Leaving aside the plant parasitic forms of the family Longidoridae Thorne, 1935, we can say that the study of dorylaims in Iran is in its infancy despite the great extent of the country and the abundance and diversity of these nematodes. The matter, however, has received more attention during the last 15 years (by, among others: Jairajpuri et al, 1998;Fadaei, 2003;Pedram et al, 2009;Niknam et al, 2010;Ashrafi et al, 2011;Jabbari et al, 2012;Moslehi et al, 2012;and Mowlavi et al, 2012), resulting in the discovery of many new and known species and demonstrating that Iranian dorylaims are likely as diverse as those from other regions of the world.…”