Ditylenchus anchilisposomus Fortuner 1982

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).
Published as part of Hashemi, Kobra & Karegar, Akbar, 2019, Description of Ditylenchus paraparvus n. sp. from Iran with an updated list of Ditylenchus Filipjev, 1936 (Nematoda: Anguinidae), pp. 85-113 in Zootaxa 4651 (1) on page 90, DOI: 10.11646/zootaxa.4651.1.6, http://zenodo.org/record/3359134
{"references":["Tarjan, A. C. (1958) A new genus, Pseudhalenchus (Tylenchinae: Nematoda), with descriptions of two new species. Proceedings of the Helminthological Society of Washington, 25, 20 - 25.","Fortuner, R. (1982) On the genus Dilylenchus Filipjev, 1936 (Nematoda: Tylenchida). Revue de Nematologie, 5, 17 - 38.","Wasilewska, L. (1965) Ditylenchus medicaginis n. sp., a new parasitic nematode from Poland (Nematoda, Tylenchidae). Bulletin de l'Academie polonaise des Sciences. Classe II. Serie des Sciences Biologiques, 13, 167 - 170.","Goodey, J. B. (1958) Ditylenchus myceliophagus n. sp. (Nematoda: Tylenchidae). Nematologica, 3, 91 - 96. https: // doi. org / 10.1163 / 187529258 X 00166","Brzeski, M. W. (1991) Review of the genus Ditylenchus Filipjev, 1936 (Nematoda: Anguinidae). Revue de Nematologie, 14, 9 - 59.","Gritzenko, V. P. (1971) Ditylenchus tenuidens n. sp. and Aphelenchoides curiolis n. sp. (Nematoda, Tylenchidae and Aphelenchoididae) from Kirgizia. Zoologicheskii Zhurnal, 50, 1402 - 1405.","Thorne, G. & Malek, R. B. (1968) Nematodes of the northern Great Plains. Part I. Tylenchida (Nemata: Secernentea). South Dakota agricultural Experiment Station Technical Bulletin, 31, 1 - 111."]}