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<p>A new species of the genus <italic>Oscheius</italic>, <italic>O. saproxylicus</italic> sp. n., collected in decaying wood obtained from an orchard in Southern Iberian Peninsula, is reported. A detailed description, including morphometrics, LM and SEM images, and molecular (18S and 28S rDNA genes) information is provided. The female is characterized by a moderately long body, lateral field with three longitudinal ridges, midbody vulva, and conical tail with acute tip. It was distinguished from its closest relative, <italic>O. dolichura</italic>, by a shorter tail and longer rectum. The male was not found. Morphological and molecular data support its belonging to <italic>Dolichura</italic>-group. Molecular analyses show that both <italic>Insectivorus</italic> and <italic>Dolichura</italic> groups are related to each other, being proposed as subgenera of the genus <italic>Oscheius</italic> as <italic>Oscheius</italic> and <italic>Dolichorhabditis.</italic> Finally, an updated taxonomy of the genus is presented, with generic and subgeneric diagnoses, list of species and a key to their identification.</p>
</abstract>

A new species of the genus Oscheius, O. saproxylicus sp. n., collected in decaying wood obtained from an orchard in Southern Iberian Peninsula, is reported. A detailed description, including morphometrics, LM and SEM images, and molecular (18S and 28S rDNA genes) information is provided. The female is characterized by a moderately long body, lateral field with three longitudinal ridges, midbody vulva, and conical tail with acute tip. It was distinguished from its closest relative, O. dolichura, by a shorter tail and longer rectum. The male was not found. Morphological and molecular data support its belonging to Dolichura-group. Molecular analyses show that both Insectivorus and Dolichura groups are related to each other, being proposed as subgenera of the genus Oscheius as Oscheius and Dolichorhabditis. Finally, an updated taxonomy of the genus is presented, with generic and subgeneric diagnoses, list of species and a key to their identification.

Morphological and Molecular Characterization of <italic>Oscheius saproxylicus</italic> sp. n. (Rhabditida, Rhabditidae) From Decaying Wood in Spain, With New Insights into the Phylogeny of the Genus and a Revision of its Taxonomy

Journal of Nematology

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

Morphological and Molecular Characterization of  sp. n. (Rhabditida, Rhabditidae) From Decaying Wood in Spain, With New Insights into the Phylogeny of the Genus and a Revision of its Taxonomy

running-head

A new species of the genus Oscheius, O. saproxylicus sp. n., collected in decaying wood obtained from an orchard in Southern Iberian Peninsula, is reported. A...

Morphological and Molecular Characterization of Oscheius saproxylicus sp. n. (Rhabditida, Rhabditidae) From Decaying Wood in Spain, With New Insights into the Phylogeny of the Genus and a Revision of its Taxonomy

Article Category: Arts & Humanities

Publié en ligne: 17 sept. 2019

Pages: 1 - 21

Reçu: 13 nov. 2018

DOI: https://doi.org/10.21307/jofnem-2019-053

© 2019 Joaquín Abolafia et al., published by Sciendo

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