Ditylenchus anchilisposomus ( Tarjan, 1958 ) Fortuner, 1982

Hashemi, Kobra & Karegar, Akbar, 2019, Description of Ditylenchus paraparvus n. sp. from Iran with an updated list of Ditylenchus Filipjev, 1936 (Nematoda: Anguinidae), Zootaxa 4651 (1), pp. 85-113 : 90

1. Ditylenchus anchilisposomus ( Tarjan, 1958) Fortuner, 1982

7 females: L = 660 (615–708) µm; stylet = 8.4 (7.5–9) µm; pharynx = 117 (107–139) µm; anterior end to end of glands = 144 (114–170) µm; tail = 55.8 (51–66) µm; a = 42.1 (37.3–46.9); b = 5.7 (4.4–6.5); c = 11.9 (10.6–13.2); c′ = 5.3 (4.8–5.7); V = 80.1 (77.5–82.0); V′ = 87.5 (85.3–88.7); PUS/VBW = 2.0 (1.4–2.6); PUS/V-A = 40.4 (29.2– 46.2) %; V-A/T = 1.4 (1.2–1.7).

3 males: L = 620 (610–632) µm; stylet = 7.8 (7–8) µm; pharynx = 110 (103–114) µm; anterior end to end of glands = 138 (135–139) µm; tail = 55.4 (50–64) µm; a = 44.5 (41.5–47.3); b = 5.7 (5.4–6.0); c = 11.3 (9.9–12.1); c′ = 5.3 (4.7–6.6); spicules = 15.5 (15–16) µm.

Diagnosis. D. anchilisposomus is characterised by six lateral field incisures, head with rounded margins and weak cephalic skeleton, delicate medium-sized stylet with small rounded to posteriorly sloping knobs, usually long (seldom pyriform) basal pharyngeal bulb overlapping intestine and measuring 7–41 µm and seldom pyriform, posterior position of vulva, long post-vulval uterine sac, rounded to dull tail tip and short spicules.

The Iranian population of D. anchilisposomus is similar to D. dauniae Brzeski & Marinari, 1991 , D. geraerti , D. medicaginis Wasilewska, 1965 , D. myceliophagus Goodey, 1958 , D. silvaticus Brzeski, 1991 , D. tenuidens Gritzenko, 1971 , D. triformis and D. valveus Thorne & Malek, 1968 . It can be distinguished from all of these, except some specimens of D. myceliophagus , by having a long pharyngeal lobe overlapping intestine. The only difference between D. anchilisposomus and D. myceliophagus is the cephalic skeleton (weak to medium and extending two annuli into the body vs. short, crescentic and with refractive margins).