Acrobeloides ishraqi sp. n. and Acrobeloides mushtaqi sp. n. (Nematoda: Rhabditida) from chickpea rhizosphere, Uttar Pradesh, India

Abstract

Two new species of nematode in the genus Acrobeloides were found from rhizosphere of chickpea from Jhansi and Faizabad districts of Uttar Pradesh, India. Acrobeloides ishraqi sp. n. and A. mushtaqi were identified and described on the basis of morphological observations. Measurement and morphological observation of different stages of A. ishraqi were taken and compared with known species of the genus. Acrobeloides ishraqi sp. n. is closely related to Acrobeloides bodenheimeri (Steiner G. 1936. Opuscula miscellanea nematologica, IV. Proceedings of the Helminthological Society of Washington. Vol. 3. p. 74–80.), Thorne G. 1937. A revision of the nematode family Cephalobidae Chitwood & Chitwood, 1934. Proceedings of Helminth Society, Washington. Vol. 4. p. 1–16; however, it differs in having longer body 0.99–1.19 mm (vs. L = 0.655–0.821mm); longer stoma 15.5–16.49 μm (vs. stoma = 11–13 μm), longer pharyngeal corpus 179.4–223.1 μm (vs. pharynx 140–170 m); larger bulb 24.25–38.8 μm (vs. 19–25 μm); bulb is spherical (vs. ovoid), of lesser a value 10.5–15.8 (vs. a = 16.6–23.5); longer rectum 31.04–42.68 μm. (vs. rectum = 20–27 μm) and absence of males (vs. male present). Tail shape is blunt in sp. n. vs. rounded terminus. A. ishraqi sp. n. also compared with Acrobeloides arenicola (Abolafia J, Pena-Santiago R. 2003. Nematodes of the order Rhabditida from Andalucía Oriental, Spain. The genus Acrobeloides (Cobb, 1924) Thorne, 1937, with description of A. arenicola sp. n. and a key to species. J Nematode Morphol Syst. 5:107–130) but differs in having longer body (vs. c = 9.6–10.5); lesser C1 value (vs. C1 = 3.3 –3.7); lesser number of labial probolae (vs. labial probolae 5); shape of female tail (vs. tail with pointed terminus). A. mushtaqi sp. n. comprises of 0.49–0.79 mm long nematodes, with annulated cuticle all over the body. Body pores are very prominent. Reproductive system monoprodelphic with posteriorly out-stretched ovary extending beyond vulva with single flexure. New species close resemblance to A. bodenheimeri (Steiner G. 1936. Opuscula miscellanea nematologica, IV. Proceedings of the Helminthological Society of Washington. Vol. 3. p. 74–80) Thorne G. 1937. A revision of the nematode family Cephalobidae Chitwood & Chitwood, 1934. Proceedings of Helminth Society, Washington. Vol. 4. p. 1–16, but differs in having prominent body pores, greater a value (vs. a = 16–24 in A. bodenheimeri); lesser number of lateral lines (vs. lateral field with five incisures); difference in lip region n. sp. bears a pair of sensilla (vs. flattened amalgamated lips in A. bodenheimeri).