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Issue: Vol. 4088 No. 1: 8 Mar. 2016
Type: Article
Published: 2016-03-07
DOI: 10.11646/zootaxa.4088.1.6
Page range: 129–138
Abstract views: 69
PDF downloaded: 1

A new species of the genus Discolaimus Cobb, 1913 (Nematoda: Dorylaimida: Qudsianematidae) from Qinghai, China

Lab of Plant Nematology/Research Center of Nematodes of Plant Quarantine, Department of Plant Pathology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong 510642, China
Department of Grassland Sciences, Agriculture and Animal Husbandry College, Qinghai University, Xining, Qinghai 810003, China
Lab of Plant Nematology/Research Center of Nematodes of Plant Quarantine, Department of Plant Pathology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong 510642, China
Lab of Plant Nematology/Research Center of Nematodes of Plant Quarantine, Department of Plant Pathology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong 510642, China
Department of Grassland Sciences, Agriculture and Animal Husbandry College, Qinghai University, Xining, Qinghai 810003, China
Lab of Plant Nematology/Research Center of Nematodes of Plant Quarantine, Department of Plant Pathology, College of Agriculture, South China Agricultural University, Guangzhou, Guangdong 510642, China
Nematoda Discolaimus key morphology new species Qudsianematidae taxonomy

Abstract

A new species of the family Qudsianematidae Jairajpuri, 1965 collected from soil from Qinghai Province, China is described as Discolaimus anemaqen n. sp. It is mainly characterized by having a disc-like lip region with six labial sectors separated by six Y-shaped radial grooves; amphid fovea an inverted-stirrup shape; odontostyle aperture 53–59% of its length; anterior part of pharynx with two swellings, basal part expanded gradually with a sheath of tissue visible ventrally and at the base; no groups of large cells observed in cardiac region; female genital system amphidelphic; tail dorsally convex, conoid, with flat ventral side and bluntly rounded terminus, and males not found. The new species is close to D. major Thorne, 1939, D. similis Thorne, 1939 and D. silvicolus Sauer & Annells, 1985 in most measurements, but can be differentiated from them by lip morphology, pharynx structure, body size, and tail shape. A key to the species of Discolaimus is also provided.

 

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