Laimaphelenchus persicus
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Ordo: Aphelenchida
Familia: Aphelenchidae
Genus: Laimaphelenchus
Name
Laimaphelenchus persicus Asghari, Ramazan, 2012 – Wikispecies link – Pensoft Profile
- Laimaphelenchus persicus Asghari, Ramazan, 2012, Zootaxa 3325: 60-65.
Description
Measurements.Table 1.
Materials Examined
Material examined. The description presented here is based on measurements of 18 ♀s and seven ♂s; Gorgan, Golestan province, north of Iran (GPS coordinates: N 36 ° 49 ', E 54 ° 23 '). Extracted from bark of a dead pine (Pinus sylvestris) in the Hezarpich region. Coll. Ramazan Asghari, in May and June 2010. Holotype female, ten paratype females and four males deposited in the Nematode Collection of the Faculty of Agriculture, University of Tarbiat Modares, Tehran, Iran (slide no, LP 0012,1–LP 0012,4). Vouchers (collection data as above): Five paratype females and two males deposited at the National Nematode Collection, New Zealand (NNCNZ). Three paratype females and one male deposited in the Canadian National Nematode Collection, Ottawa, Canada.
Description
Description. Female. Body ventrally arcuate in heat relaxed specimens. Cuticle with fine transverse annulations about 1.4–1.8 µm apart at mid-body. Lateral fields with 4 incisures, inner 2 incisures closer together than outer pair, not areolate, extending to origin of tubercle. Head region rounded, slightly offset, and slightly wider than body at base, 3–3.5 µm high and 6–7.5 µm wide. Cephalids not seen. Stylet slender with small basal swellings. Procorpus cylindrical, 40–43 µm long, median bulb rounded to oval, 16–20 μm long, 11.5–13 μm wide with crescentic valves centrally, located 56–68 μm from the anterior end; isthmus 37–44 µm long, encircled by nerve ring at about its mid-length. Nerve ring located anterior to excretory pore.
Population Characters Holotype female Paratype females mean±s.d. range Paratype males mean±s.d. range n L a1 18 – 888.0 767.6±75.0 615.0–925.0 40.3 42.6±3.1 35.9–48.7 7 – 769.0±73.9 641.0–857.0 49.2±4.6 42.7–56.7b b' c7.7 7.0±0.5 6.4–8.0 5 4.3±0.4 3.9–5.4 26.9 21.8±1.7 17.5–24.7 6.7±0.4 6.1–7.4 4.5±0.3 4.2–5.1 17.8±1.4 16.4–20.1c' V or T Head height2.7 3.1±0.2 2.8–3.7 67.7 68.0±0.6 66.6–68.9 4.0 3.1±0.3 3.0–3.5 3.1±0.2 2.7–3.6 65.6±2.1 63.6–68.5 3.2±0.3 3.0–4.0Head width Stylet m Anterior end to valves of median bulb MB Pharynx length Head–vulva7.0 6.5±0.5 6.0–7.5 10.0 10.9±0.4 10.0–11.5 45.0 42.8±2.7 36.3–45.4 59.0 63.3±3.6 56.0–68.0 51.7 58.3±2.6 54.8–64.7 114.0 109.4±7.3 95.0–121.0 602.0 521.9±49.0 423.0–630.0 6.3±0.3 6.0–7.0 10.9±0.5 10.0–11.5 43.7±4.6 36.4–50.0 63.4±1.9 62.0–67.0 56.2±3.7 52.9–63.6 113.1±6.5 99.0–117 – –Maximum body width PUS length PUS/maximum body width Vulva –anus Tail length PUS/V–A22.0 18.0±1.1 16.0–20.0 153.0 130.8±20.0 100.0–162.0 6.9 7.2±1.0 5.5–9.0 253.0 210.4±25.0 164.0–255.0 33.0 35.2±2.7 28.0–40.0 60.4 62.4±8.5 46.0–75.5 15.6±1.1 14.0–17.5 – – – – – – 43.1±4.2 39.0–51.0 – –PUS/L Spicule length– 17.0±2.4 12.6–20.5 – – – – – 20.4±0.7 19.0–21.0 Excretory pore conspicuous. Hemizonid not seen. Pharyngeal glands overlapping intestine on dorsal side, extending for 51–85 μm. Reproductive system with outstretched ovary with oocytes in single file; conspicuous spermatheca filled with sperm cells; vagina sloping anteriorly, with massive sclerotization (Fig. 1 F, G). Post-vulval uterine sac (PUS) occupying 46–75 % of distance from vulva to anus. Vulva with well-developed anterior vulval flap (Fig. 2 C). Tail conoid, ventrally curved, with a single stalk-like terminus and four pedunculate tubercles ending with 4–6 finger-like protrusions which curve towards body. Male. Morphology similar to that of female. Testis outstretched, spermatocytes in a single column. Spicules paired, rosethorn–shaped, with prominent capitulum and rostrum broad with bluntly rounded tip. No gubernaculum present. Caudal papillae located at three positions: first pair preanal subventral, second pair postanal subventral, at about 48–62 % of distance between cloacal aperture to tail tip and third pair subventrally, very small, in some specimens obscure and at 78–81 % of distance between cloaca and tail tip (Fig. 2 E, F). Tail conoid, ventrally curved, with a single stalk-like terminus and four pedunculate tubercles ending with 4–6 finger-like protrusions which curve towards body.
Diagnosis
Diagnosis and Relationships.Laimaphelenchus persicus n. sp. is characterised by having a distinct tail shape with an offset terminus, with 4 clearly pedunculate tubercles ending in 4–6 finger-like protrusions which curve towards the nematode body in both sexes; lateral fields with four lines; female with vulval flap; male with three pairs of caudal papillae, one pair pre-anal subventral, one pair post-anal subventral at 40–62 % of distance between cloaca and tail end and one small pair anterior to tail terminus at 78–81 % of distance between cloaca and tail tip. The species in the genus Laimaphelenchus are divided into those with and those without a vulval flap (Baujard 1981; Hunt 1993). Laimaphelenchus persicus n. sp. belongs to the first group, bringing its members to nine. The other species in this group are L. penardi, L. deconincki, L. pensobrinus, L. cocuccii, L. unituberculus, L. helicosoma, L. preissii and L. simlaensis.
Laimaphelenchus persicus n. sp. is morphologically close to L. penardi, L. pensobrinus, L. deconincki, L. phloesini, L. pini, L. australis, L. cocuccii, L. pannocaudus and L. patulus.
Etymology
Etymology. The species epithet “ persicus ” refers to the Latin name of Iran, the country of origin of this species.
Taxon Treatment
- Asghari, Ramazan; Pourjam, Ebrahim; Heydari, Ramin; Zhao, Zeng Qi; 2012: Laimaphelenchus persicus n. sp. (Nematoda: Aphelenchoididae) from Iran, Zootaxa 3325: 60-65. doi
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