Journal
PAKISTAN JOURNAL OF ZOOLOGY
Volume 54, Issue 2, Pages 993-996Publisher
ZOOLOGICAL SOC PAKISTAN
DOI: 10.17582/journal.pjz/20200910100938
Keywords
Mononchids; Oionchus; Soil nematodes; Morphology; Taxonomy
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A new species of Oionchus, Oionchus sindhicus n. sp., is described from soil samples collected around the roots of cotton plants in Umerkot, Sindh, Pakistan. Morphological and morphometric data of two other Oionchus species from Pakistan, O. paraobtusus Jairajpuri and Khan, 1982 and O. obtusus Cobb, 1913, are also provided.
Oionchus sindhicus n. sp., is described from specimens collected from soil around the roots of cotton (Gossypium hirsutum L.) from Umerkot, Sindh, Pakistan. The new species is characterized by having a combination of characters: body length of female 0.7-1.0 mm, vulva at 56-59 percent of body length, anterior part of buccal cavity 5-7 ??m wide, pharynx 198-238 ??m long, tail 30-33 ??m long, post uterine sac 10-16 ??m in length, apex of dorsal tooth 3-5 ??m from anterior end. Morphometric and morphological data of O. paraobtusus Jairajpuri and Khan, 1982 and O. obtusus Cobb, 1913 are also given. These species are described and redescribed for the first time from Pakistan.
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