New and Known Species of Pratylenchus Filipjev, 1936 (Nematoda: Pratylenchidae) from Haryana, India, with Remarks on Intraspecific Variations

Authors

  • Harish K. Bajaj
  • D. S. Bhatti

Abstract

Two new monosexual and one bisexual species Pratylenchus Filipjev, 1936 collected from Haryana state of India are described and illustrated. The primary distinguishing features of these species are Pratylenchus microstylus n. sp.: L = 331-458 [mu]m, spear = 11 or 12 [mu]m; Pratylenchus cruciferus n. sp.: L = 648-793 [mu]m, central core of lateral fields with oblique lines, hemizonid 2-8 annules anterior to excretory pore; Pratylenchus ekrami n. sp.: spear = 11-13 [mu]m, spermatheca oblong, post vulval uterine sac with differentiated cells, tail with 26-40 annules, males abundant. Studies on intraspecific variations of P. cruciferus, P. ekrami, and P. coffeae (Zimmermann, 1898) Goodey, 1951 revealed that spear length and value of 'V' are the least variable characters. Body length and size of post vulval uterine sac varies to varying degrees in different species. Shape of median bulb in P. ekrami, number of incisures in P. coffeae, and tail shape in P. ekrami and P. coffeae exhibit the greatest amount of intraspecific variations. P. zeae Graham, 1936 and P. thornei Sher & Allen, 1953 are the other species collected during the present studies. Key words: taxonomy, morphology, Pratylenchus microstylus, P. cruciferus, P. ekrami.

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Published

1984-10-15

Issue

Vol. 16, No. 4 (October 1984)

Section

Articles

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