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Steinernema sichuanense n. sp (Rhabditida, Steinernematidae), a new species of entomopathogenic nematode from the province of Sichuan, east Tibetan Mts., China

文献类型： 外文期刊

作者： Mracek, Zdenek 1 ; Nguyen, Khuong B. 2 ; Tailliez, Patrick 2 ; Boemare, Noel 3 ; Chen, Shulong;

作者机构： 1.Acad Sci Czech Republic, Inst Entomol, Lab Insect Pathol, CR-37005 Ceske Budejovice, Czech Republic

2.Acad Sci Czech Republic, Inst Entomol, Lab Insect Pathol, CR-37005 Ceske Budejovice, Czech Republic; Univ Florida, Dept Entomol & Nematol, Gainesville, FL 32611 USA; Univ Montpellier 2, INRA, Unite Ecol Microbienne Insectes & Interact Hote P, F-34095 Montpellier, France; Hebei Acad Agr & Forestry Sci, Inst Plant Protect, Baoding 071000, Peoples R China

3.Acad Sci Czech Republic, Inst Entomol, Lab Insect Pathol, CR-37005 Ceske Budejovice, Czech Republic; Univ Florida, Dept Entomol & Nematol, Gainesville, FL 32611 USA; Univ Montpellier 2, INRA, Unite Ecol Microbie

关键词： description;entomopathogenic nematodes;insect parasites;molecular;new species;phylogenetic systematics;Steinernema;Xenorhabdus;taxonomy

期刊名称：JOURNAL OF INVERTEBRATE PATHOLOGY （ 影响因子：2.841； 五年影响因子：3.368 ）

ISSN： 0022-2011

年卷期： 2006 年 93 卷 3 期

页码：

收录情况： SCI

摘要： Steinernema sichuanense n. sp. is characterized by male, female and IJ. For male, the spicules are robust with prominent rostrum; gubernaculum has blunt anterior end; cuneus is arrow-shaped, pointed posteriorly. Second-generation male has a prominent mucron. For female, tail usually has one to four papillae-like projections on tail tip; post anal swelling is absent. For U, body length is about 7 10 gm; lateral field has six ridges; the formula of lateral field is 2, 5, 6, 4, 2 with two prominent submarginal ridges; tail usually has a dorsal depression. In Steinernema affine/intermedium group, the U of S. sichuanense n. sp. differs from S. affine by its absence of the internal tail spine; differs from Steinernema beddingi by its six ridges in lateral field compared to 4 for S. beddingi. For male mucron is absent in both generations of S. affine, S. intermedium and S. beddingi, whereas it is present in the second-generation of S. sichuanense sp. n. Morphology and morphometrics of spicules and gubernacula of the four species in S. affine/intermedium group are quite different based on SEM photographs. For female, the postanal swelling is absent in the first-generation of S. sichuanense n. sp. whereas S. affine and S. intermedium have slight swelling and S. beddingi has conspicuous swelling. The new species is further recognized by characterization of sequences of ITS and D2/D3 regions of the ribosomal DNA. The symbiotic bacterium associated to S. sichuanense belongs to the species Xenorhabdus bovienii. (c) 2006 Elsevier Inc. All rights reserved.

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