<abstract xmlns="http://www.w3.org/1999/xhtml"><p><italic>Sectonema caobangense</italic> sp. n. from evergreen forest soil in Vietnam is described, including scanning electron micrograph (SEM) observations and D2-D3 LSU rDNA analysis. The new species is characterized by its 3.12 to 5.80 mm long body, lip region offset by deep constriction and 21 to 23 μm broad, mural tooth 13 to 14 μm long at its ventral side, 940 to 1,112 μm long neck, pharyngeal expansion occupying 61% to 69% of total neck length, uterus a long simple tube-like structure 292 to 363 μm long or 2.7 to 2.9 times the corresponding body diameter, <italic>pars refringens vaginae</italic> well developed, <italic>V</italic> = 48 to 56, short (36-51 μm, <italic>c</italic> = 77-132, <italic>c</italic>’ = 0.5-0.8) and rounded tail, 87 to 99 μm long spicules, and four or five irregularly spaced ventromedian supplements bearing hiatus. <italic>Sectonema caobangense</italic> sp. n. differs from the typical pattern of <italic>Sectonema</italic> in the nature of the stomatal protrusible structure, bearing a mural tooth attached to the ventral side of the stoma. Molecular data obtained and the derived evolutionary trees support a close phylogenetic relationship with other <italic>Sectonema</italic> species.</p></abstract>

Sectonema caobangense sp. n. from evergreen forest soil in Vietnam is described, including scanning electron micrograph (SEM) observations and D2-D3 LSU rDNA analysis. The new species is characterized by its 3.12 to 5.80 mm long body, lip region offset by deep constriction and 21 to 23 μm broad, mural tooth 13 to 14 μm long at its ventral side, 940 to 1,112 μm long neck, pharyngeal expansion occupying 61% to 69% of total neck length, uterus a long simple tube-like structure 292 to 363 μm long or 2.7 to 2.9 times the corresponding body diameter, pars refringens vaginae well developed, V = 48 to 56, short (36-51 μm, c = 77-132, c’ = 0.5-0.8) and rounded tail, 87 to 99 μm long spicules, and four or five irregularly spaced ventromedian supplements bearing hiatus. Sectonema caobangense sp. n. differs from the typical pattern of Sectonema in the nature of the stomatal protrusible structure, bearing a mural tooth attached to the ventral side of the stoma. Molecular data obtained and the derived evolutionary trees support a close phylogenetic relationship with other Sectonema species.

<italic>Sectonema caobangense</italic> sp. n. from Vietnam (Nematoda, Dorylaimida, Aporcelaimidae)

Biología Vegetal y Ecología, Universidad de Jaén

Vietnam Academy of Science and Technology

Journal of Nematology

This work is licensed under the Creative Commons Attribution 4.0 International License.

 sp. n. from Vietnam (Nematoda, Dorylaimida, Aporcelaimidae)

Sectonema caobangense sp. n. from evergreen forest soil in Vietnam is described, including scanning electron micrograph (SEM) observations and D2-D3 LSU rDNA...

Sectonema caobangense sp. n. from Vietnam (Nematoda, Dorylaimida, Aporcelaimidae)

Publié en ligne: 21 juil. 2017

Pages: 95 - 103

Reçu: 05 janv. 2016

DOI: https://doi.org/10.21307/jofnem-2017-014

Mots clés
Bayesian inference, description, LSU ribosomal DNA, maximum likelihood, morphology, morphometrics, SEM, taxonomy

© 2016 Sergio Álvarez-Ortega et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Sectonema caobangense sp. n. from Vietnam (Nematoda, Dorylaimida, Aporcelaimidae)

Publié en ligne: 21 juil. 2017

Pages: 95 - 103

Reçu: 05 janv. 2016

DOI: https://doi.org/10.21307/jofnem-2017-014

Mots clésBayesian inference, description, LSU ribosomal DNA, maximum likelihood, morphology, morphometrics, SEM, taxonomy

© 2016 Sergio Álvarez-Ortega et al., published by Sciendo

This work is licensed under the Creative Commons Attribution 4.0 International License.

Mots clés
Bayesian inference, description, LSU ribosomal DNA, maximum likelihood, morphology, morphometrics, SEM, taxonomy