<abstract xmlns="http://www.w3.org/1999/xhtml">

<p>A newly recovered population of the genus <italic>Laimaphelenchus</italic> from a dead maritime pine wood sample in Potchefstroom, South Africa, representing a new species, named <italic>L. africanus</italic> n. sp., is herein described and illustrated based on morphological and molecular data. The new species is mainly characterized by the following: 750–987 µm long females; a cephalic region with no disc and six cephalic lobs not divided by ribs; a 10.0–12.5 µm long stylet; four incisures in the lateral field; secretory-excretory pore (SE-pore) at slightly posterior to the nerve ring; vulva with a well-developed anterior flap, vagina with two well-developed sclerotized pieces; post-vulval uterine sac (PUS) 63–125 µm long; tail conical, 30–44 µm long, ventrally curved with a subventral stalk in terminus, lacking tubercles, with six to nine small projections at the tip in scanning electron microscopy (SEM); and rare males with 17 μm long spicules. The new species was morphologically compared to those species of the genus with a stalk in tail terminus, lacking tubercles, a vulval flap and four incisures in the lateral field viz., <italic>L. liaoningensis</italic>, <italic>L. preissii</italic>, <italic>L. simlaensis</italic>, <italic>L. sinensis</italic>, <italic>L. spiflatus</italic>, and <italic>L. unituberculus</italic>. Phylogenetically, the new species was placed into the major <italic>Laimaphelenchus</italic> clade using partial large subunit ribosomal DNA (LSU rDNA D2-D3) sequences. An overall literature review corroborated the presence of the stalk (currently with two main groups) at the tail end is the main characteristic trait delimiting the genus. A compendium based on the characters of the stalk, presence/absence of a vulval flap in females and number of the lateral lines was also established.</p>
</abstract>

A newly recovered population of the genus Laimaphelenchus from a dead maritime pine wood sample in Potchefstroom, South Africa, representing a new species, named L. africanus n. sp., is herein described and illustrated based on morphological and molecular data. The new species is mainly characterized by the following: 750–987 µm long females; a cephalic region with no disc and six cephalic lobs not divided by ribs; a 10.0–12.5 µm long stylet; four incisures in the lateral field; secretory-excretory pore (SE-pore) at slightly posterior to the nerve ring; vulva with a well-developed anterior flap, vagina with two well-developed sclerotized pieces; post-vulval uterine sac (PUS) 63–125 µm long; tail conical, 30–44 µm long, ventrally curved with a subventral stalk in terminus, lacking tubercles, with six to nine small projections at the tip in scanning electron microscopy (SEM); and rare males with 17 μm long spicules. The new species was morphologically compared to those species of the genus with a stalk in tail terminus, lacking tubercles, a vulval flap and four incisures in the lateral field viz., L. liaoningensis, L. preissii, L. simlaensis, L. sinensis, L. spiflatus, and L. unituberculus. Phylogenetically, the new species was placed into the major Laimaphelenchus clade using partial large subunit ribosomal DNA (LSU rDNA D2-D3) sequences. An overall literature review corroborated the presence of the stalk (currently with two main groups) at the tail end is the main characteristic trait delimiting the genus. A compendium based on the characters of the stalk, presence/absence of a vulval flap in females and number of the lateral lines was also established.

<article-title xml:lang="en"><italic>Laimaphelenchus africanus</italic> n. sp. (Tylenchomorpha: Aphelenchoididae) from South Africa, a morphological and molecular phylogenetic study, with an update to the diagnostics of the genus

Journal of Nematology

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

 n. sp. (Tylenchomorpha: Aphelenchoididae) from South Africa, a morphological and molecular phylogenetic study, with an update to the diagnostics of the genus

A newly recovered population of the genus Laimaphelenchus from a dead maritime pine wood sample in Potchefstroom, South Africa, representing a new species,...

Laimaphelenchus africanus n. sp. (Tylenchomorpha: Aphelenchoididae) from South Africa, a morphological and molecular phylogenetic study, with an update to the diagnostics of the genus

Publié en ligne: 21 mai 2021

Pages: 1 - 14

DOI: https://doi.org/10.21307/jofnem-2021-053

Mots clés
Aphelenchoidea, Compendium, Grouping, LSU rDNA D2-D3, Phylogeny, Potchefstroom, Stalk, Taxonomy

© 2021 Farahnaz Jahanshahi Afshar et al., published by Sciendo.

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

Laimaphelenchus africanus n. sp. (Tylenchomorpha: Aphelenchoididae) from South Africa, a morphological and molecular phylogenetic study, with an update to the diagnostics of the genus

Publié en ligne: 21 mai 2021

Pages: 1 - 14

DOI: https://doi.org/10.21307/jofnem-2021-053

Mots clésAphelenchoidea, Compendium, Grouping, LSU rDNA D2-D3, Phylogeny, Potchefstroom, Stalk, Taxonomy

© 2021 Farahnaz Jahanshahi Afshar et al., published by Sciendo.

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

Mots clés
Aphelenchoidea, Compendium, Grouping, LSU rDNA D2-D3, Phylogeny, Potchefstroom, Stalk, Taxonomy