Steinernema jeffreyense n. sp. (Rhabditida: Steinernematidae), a new entomopathogenic nematode from South Africa

Journal of Helminthology
Antoinette P MalanL Tiedt

Abstract

During a non-targeted survey for entomopathogenic nematodes in South Africa, a new species of Steinernema was isolated from a soil sample collected from underneath a guava tree, close to the shore at Jeffrey's Bay. The nematode was isolated by means of the insect-baiting technique using last-instar larvae of Galleria mellonella. It is described herein as Steinernema jeffreyense n. sp. The nematode can be separated from other described, closely related species in terms of the morphological and morphometric characteristics of the different life stages, and in terms of the characterization and phylogeny of DNA sequences of the internal transcribed spacer (ITS) rDNA of the 18S gene, and of the D2D3 region of the 28S rDNA gene. The new species is placed molecularly in the arenarium-glaseri-karii-longicaudatum group characterized by the following morphological characters: infective third-stage juvenile with a body length of 926 (784-1043) μm, distance from head to excretory pore of 87 (78-107) μm, tail length of 81 (50-96) μm, with an E% of 109 (86-169), and eight evenly spaced ridges (i.e. nine lines) in the middle of the body. First-generation males have a spicule length of 88 (79-95) μm and gubernaculum length of 57 (51-61) μm. Ma...Continue Reading

Citations

Jul 7, 2020·Journal of Nematology·Ramandeep K SandhiGadi V P Reddy
Jan 9, 2019·Frontiers in Microbiology·Jönike DreyerLeon M T Dicks

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