Description of Panagrolaimus namibiensis n. sp. (Rhabditida Panagrolaimidae), an Anhydrobiotic Nematode from the Namib Desert of Namibia

Description of Panagrolaimus namibiensis n. sp. (Rhabditida : Panagrolaimidae), an Anhydrobiotic Nematode from the Namib Desert of Namibia

© 2024 Christopher J. Rawson et al., published by Sciendo.

Bibliographische Detailangaben
Veröffentlicht in:Journal of nematology. - 1969. - 56(2024), 1 vom: 21. März, Seite 20240039
1. Verfasser: Rawson, Christopher J (VerfasserIn)
Weitere Verfasser: Nemmers, London, Criswell, Stacey, Smythe, Ashleigh B, Burke, Alison K, Marais, Eugene, Maggs-Kölling, Gillian, Treonis, Amy M
Format: Online-Aufsatz
Sprache:English
Veröffentlicht: 2024
Zugriff auf das übergeordnete Werk:Journal of nematology
Schlagworte:Journal Article Cryptobiosis morphology phylogeny scanning electron microscopy taxonomy
Beschreibung
Zusammenfassung:© 2024 Christopher J. Rawson et al., published by Sciendo.
Panagrolaimus namibiensis n. sp. was recovered and cultured from soils collected under Arthraerua leubnitziae (pencil-bush) in the Namib Desert of Namibia, one of the driest terrestrial habitats on Earth. It is described here based on morphometrics, scanning electron micrographs, light images, line drawings, and molecular data. The new species is distinguished by having a conspicuous posterior deirid, a hook-shaped stegostomal dorsal tooth, and anterior deirids and excretory pore aligned at mid-bulb. It was morphologically compared to eleven well-described species in the genus with which it shared similar labial structure (six distinct rounded lips, and low lip segments separated in pairs), conoid tail, and/or a lateral field with three incisures, including P. labiatus, P. kolymaensis, P. davidi, P. rigidus, and P. superbus. Bayesian phylogenetic analyses using SSU and LSU rDNA each placed P. namibiensis n. sp. within clades of Panagrolaimus species, although the two trees resolved its relationship to previously described species differently. Furthermore, our analyses showed the genus is not monophyletic. In a laboratory experiment, P. namibiensis n. sp. survived exposure to 0% relative humidity for 24 h, demonstrating the anhydrobiotic ability of this species that contributes to its survival in the Namib Desert
Beschreibung:Date Revised 25.11.2024
published: Electronic-eCollection
Citation Status PubMed-not-MEDLINE
ISSN:0022-300X
DOI:10.2478/jofnem-2024-0039