Dataset Information

Description of Laimaphelenchus sinensis n. sp. (Nematoda: Aphelenchoididae) from declining Chinese pine, Pinus tabuliformis in Beijing, China.

ABSTRACT: Laimaphelenchus sinensis n. sp. isolated from declining Chinese pine, Pinus tabuliformis Carrière, is described and characterized morphologically and molecularly. The new species has four incisures in the lateral field and the excretory pore situated posterior to the nerve ring; the female has a vulval flap and vaginal sclerotization is quite prominent in majority of specimens. The female tail is conoid, ventrally curved having a single stalk-like terminus with 8 to 10 projections. The male spicules are 14.0 (13.2-15)??m long along curved median line and tail is ventrally curved typical of the genus; however, the projections are less prominent as compared to those of female. The male has two pairs of caudal papillae and Bursa is absent. Phylogenetically, the ribosomal DNA sequences of the new species placed it within Laimaphelenchus clade and are morphologically similar to L. persicus, L. preissii, L. simlaensis and L. unituberculus.Laimaphelenchus sinensis n. sp. isolated from declining Chinese pine, Pinus tabuliformis Carrière, is described and characterized morphologically and molecularly. The new species has four incisures in the lateral field and the excretory pore situated posterior to the nerve ring; the female has a vulval flap and vaginal sclerotization is quite prominent in majority of specimens. The female tail is conoid, ventrally curved having a single stalk-like terminus with 8 to 10 projections. The male spicules are 14.0 (13.2-15)??m long along curved median line and tail is ventrally curved typical of the genus; however, the projections are less prominent as compared to those of female. The male has two pairs of caudal papillae and Bursa is absent. Phylogenetically, the ribosomal DNA sequences of the new species placed it within Laimaphelenchus clade and are morphologically similar to L. persicus, L. preissii, L. simlaensis and L. unituberculus.

SUBMITTER: Gu J

PROVIDER: S-EPMC7266038 | biostudies-literature | 2020

REPOSITORIES: biostudies-literature

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Description of Laimaphelenchus sinensis n. sp. (Nematoda: Aphelenchoididae) from declining Chinese pine, Pinus tabuliformis in Beijing, China.

Gu Jianfeng J Maria Munawar M Fang Yiwu Y Liu Lele L Bian Yong Y Chen Xianfeng X

Journal of nematology 20200101

Laimaphelenchus sinensis n. sp. isolated from declining Chinese pine, Pinus tabuliformis Carrière, is described and characterized morphologically and molecularly. The new species has four incisures in the lateral field and the excretory pore situated posterior to the nerve ring; the female has a vulval flap and vaginal sclerotization is quite prominent in majority of specimens. The female tail is conoid, ventrally curved having a single stalk-like terminus with 8 to 10 projections. ...[more]

PMID: 32180385

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Project description:A new species of the genus Geocenamus was isolated from soil and root samples from the rhizosphere of Casuarina equisetifolia (Casuarinaceae) in Quang Nam province, Vietnam. This species is characterized by a round-to-hexagonal labial disc, the presence of a labial region, which is continuous or slightly offset from the body with six sectors, lateral sectors of first labial annulus being smaller than the submedian sectors, the presence of six to seven labial annules; the absence of deirids; stylet length 24 to 28???m long, body length 776 to 979???m long; lateral field with six to eight lateral lines, without areolation at mid-body and with areolation in outer bands at the tail region and a pointed tail terminus. Geocenamus vietnamensis n. sp. most closely resembles G. boghiae in having a non-sclerotized head framework and lacking a bursa in the males. It can be clearly distinguished from all other species of the genus Geocenamus by these characteristics. The combination of morphology, morphometric features, and phylogenetic trees, based on D2-D3 of 28S and ITS rDNA sequences, showed that this new species can be clearly separated from all other sequenced species. This record is the first for Geocenamus in Vietnam.A new species of the genus Geocenamus was isolated from soil and root samples from the rhizosphere of Casuarina equisetifolia (Casuarinaceae) in Quang Nam province, Vietnam. This species is characterized by a round-to-hexagonal labial disc, the presence of a labial region, which is continuous or slightly offset from the body with six sectors, lateral sectors of first labial annulus being smaller than the submedian sectors, the presence of six to seven labial annules; the absence of deirids; stylet length 24 to 28???m long, body length 776 to 979???m long; lateral field with six to eight lateral lines, without areolation at mid-body and with areolation in outer bands at the tail region and a pointed tail terminus. Geocenamus vietnamensis n. sp. most closely resembles G. boghiae in having a non-sclerotized head framework and lacking a bursa in the males. It can be clearly distinguished from all other species of the genus Geocenamus by these characteristics. The combination of morphology, morphometric features, and phylogenetic trees, based on D2–D3 of 28S and ITS rDNA sequences, showed that this new species can be clearly separated from all other sequenced species. This record is the first for Geocenamus in Vietnam.

Dataset Information

Description of Laimaphelenchus sinensis n. sp. (Nematoda: Aphelenchoididae) from declining Chinese pine, Pinus tabuliformis in Beijing, China.

Publications

Description of <i>Laimaphelenchus sinensis</i> n. sp. (Nematoda: Aphelenchoididae) from declining Chinese pine, <i>Pinus tabuliformis</i> in Beijing, China.

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