Basiria birjandiensis, Alvani & Mahdikhani-Moghadam & Rouhani & Mohammadi & Karssen, 2016

Alvani, Somaye, Mahdikhani-Moghadam, Esmat, Rouhani, Hamid, Mohammadi, Abbas & Karssen, Gerrit, 2016, Description of Basiria birjandiensis n. sp (Nematoda: Tylenchidae) from South Khorasan province with a checklist of the family Tylenchidae Örley 1880 from Iran, Zootaxa 4085 (3), pp. 345-373 : 346-347

Basiria birjandiensis n. sp.

( Fig. 1 )

Measurements ( Table 1). Female. Body almost straight to slightly curved ventrally after fixation, 584–748 µm (660.6±72.3). Cuticle with fine annuli, 0.5–1.0 µm (0.6±0.1) wide at mid body. Lateral fields with four incisures (1/ 3 of body width). Lip region high, flat at apex, not set off, non–striated, 2–4 µm (3.4±0.4) high and 5–7µm (6.3±0.5) wide at the base. Stylet with rounded knobs, 11–12 µm in length. Dorsal gland orifice located 6–9 µm posterior to stylet base. Amphidial aperture usually oblique and slit–like. Median bulb oval, weakly developed, 5– 8 µm wide and 8–14 µm long. Terminal bulb pyriform, 6–12 µm wide and 15–27 µm long. Pharyngo–intestinal valve flattened. Excretory pore located from isthmus level to the middle of the basal bulb, 78–91 µm from anterior end of the body. Deirids present in middle of lateral field, positioned at level of excretory pore. Postvulval uterine sac 8–14 µm (10.7±1.9) long. Spermatheca filled with sperm and offset. Tail filiform, 151–181 µm (164.1±13.5), with pointed terminus.

Male. Similar to female, but body shorter, 475–583 µm (529±76.5), shorter tail, 93–119 µm (106±18.4) and lower c ´= 8–9.7 (9±0.9). Spicules ventrally curved, 18–19 µm (18.5±0.6), gubernaculum slightly curved about 4–5 µm (4.7±0.3).

Etymology. From “Birjand” (the centre of the South Khorasan province) and –ensis (a Latin adjectival suffix, meaning “originating in”).

Habitat and locality. Collected from the rhizosphere of Ziziphus zizyphus in South Khorasan province, Iran.

Type material. Holotype (code number: MaUNS 111) and four paratypes (three slides, code numbers MaUNS 112–114 [three females], one slide, code number MaUNS 115 [one male]) deposited in the nematode collection of the Department of Plant Protection, College of Agriculture, Ferdowsi University of Mashhad (Mashhad, Iran). Paratypes code number WT 3661 [one female], code number WT 3662 [one female, one male], WT 3663 [two females] and WT 3664 [one juvenile, one female] at the Wageningen Nematode Collection, Plant Protection Organization (Wageningen, The Netherlands).

Diagnosis. B. birjandiensis n. sp. is differentiated from other Basiria species by its shorter body length (584– 748 µm [660.6±72.3]), high lip region with flat apex, stylet 11–12 µm (11.3±0.5), cuticle with fine annuli (0.5–1 µm wide), V = 57–60 (58.5±0.8), V ´= 77–79 (78±0.7), filiform tail, 151–181 µm (164.1±13.5), c ratio 3.7–4.2 (3.9±0.1) and higher c´ value (14.3–17.2 [15.1±0.9]).

Relationships. The new species shares an anteriorly situated median bulb and pyriform basal bulb with B. elegans ( Khan & Khan 1975) Bajaj & Bhatti 1979 , B. dolichura Loof 1971 and B. jirians Renubala & Dhanachand 1992 , but it differs as follows:

From B. elegans it differs by the shorter body (584–748 vs 750-900 µm), finer body annules (0.5–1.0 vs 1.5– 1.7 µm), higher a ratio (37–42 vs 30–36), shorter tail (151–181 vs 192–218 µm), higher c' ratio (14.3–17.2 vs 13), higher V´ ratio (77–79 vs 74–75) and, tail shape: filiform with pointed terminus in B. birjandiensis n. sp. but conoid with rounded terminus in B. elegans . It differs from B. dolichura by shorter body length (584–748 vs 820–930 µm), longer stylet (11–12 vs 9–11 µm), shorter tail (151–181 vs 220–276 µm), lower c ' ratio (14.3–17.2 vs 16–23), higher V ratio (57–60 vs 52–57) and shorter post vulval uterine sac (8–14 vs 15–16 µm). It differs from B. jirians by longer stylet length (11–12 vs 8–9 µm), longer tail (151–181 vs 130–136 µm), lower V and V' ratio (57–60 vs 61–62 and 77–79 vs 83 respectively) and the position of the excretory pore: 78–91 µm from the anterior end in B. birjandiensis n. sp. vs 64–66 µm in B. jirians .

A list of species of the family Tylenchidae recorded to date from Iran, as well as additional data on their morphometrics, geographical distributions and associated plants, is given below:

Figures

FIGURE 1. Basiria birjandiensis n. sp: Anterior end of the body (A), Lip region with amphid (B, C), Excretory pore position (D, E), Body shape of the female (F) and male (H), lateral lines (G), tail end of the female (J) and male (I) and ovary (K).