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Steinernema aciari sp. n. (Nematoda: Steinernematidae), a new entomopathogenic nematode from Guangdong, China

A new species of entomopathogenic nematode, Steinernema aciari sp. n. was described. It was recovered from a soil sample collected from Haimen town, Shantou district in the eastern coast of Guangdong province, the People’s Republic of China during a survey for entomopathogenic nematodes. S. aciari s...

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Published in:Journal of invertebrate pathology 2005, Vol.88 (1), p.58-69
Main Authors: Qiu, L., Yan, X., Zhou, Y., Nguyen, K.B., Pang, Y.
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description A new species of entomopathogenic nematode, Steinernema aciari sp. n. was described. It was recovered from a soil sample collected from Haimen town, Shantou district in the eastern coast of Guangdong province, the People’s Republic of China during a survey for entomopathogenic nematodes. S. aciari sp. n. belongs to the Steinernema glaseri group. It can be separated from all described Steinernema species by the combined morphological and morphometrical characters of various stages of the nematodes. For male, the new species can be recognized by spicule length (86 ± 6.3 μm); spicule tip blunt with a hook-like structure; gubernaculum with a short and Y-shaped cuneus and corpus well-separated posteriorly. For infective juvenile, the combination of the following characters: body length (1113 ± 68 μm), distance from anterior end to excretory pore (95 ± 3.7 μm), tail length (78 ± 5.2 μm), and E % (123 ± 7) can be used to differentiate the new species from other nematodes. For female, the tail (conoid with a long mamillate terminus and a distinct postanal swelling) and vulva (slightly protruding from body surface with conspicuous double flapped epiptygma) shapes can be used as diagnostic characters for the new species. The new species can also be distinguished from other Steinernema species by DNA sequences of either a partial 28S rDNA or the internal transcribed spacer regions of rDNA, and from the close related species S. glaseri, Steinernema longicaudum CWL05, and Steinernema guangdongense by cross-breeding test.
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For male, the new species can be recognized by spicule length (86 ± 6.3 μm); spicule tip blunt with a hook-like structure; gubernaculum with a short and Y-shaped cuneus and corpus well-separated posteriorly. For infective juvenile, the combination of the following characters: body length (1113 ± 68 μm), distance from anterior end to excretory pore (95 ± 3.7 μm), tail length (78 ± 5.2 μm), and E % (123 ± 7) can be used to differentiate the new species from other nematodes. For female, the tail (conoid with a long mamillate terminus and a distinct postanal swelling) and vulva (slightly protruding from body surface with conspicuous double flapped epiptygma) shapes can be used as diagnostic characters for the new species. 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(Nematoda: Steinernematidae), a new entomopathogenic nematode from Guangdong, China</title><title>Journal of invertebrate pathology</title><addtitle>J Invertebr Pathol</addtitle><description>A new species of entomopathogenic nematode, Steinernema aciari sp. n. was described. It was recovered from a soil sample collected from Haimen town, Shantou district in the eastern coast of Guangdong province, the People’s Republic of China during a survey for entomopathogenic nematodes. S. aciari sp. n. belongs to the Steinernema glaseri group. It can be separated from all described Steinernema species by the combined morphological and morphometrical characters of various stages of the nematodes. For male, the new species can be recognized by spicule length (86 ± 6.3 μm); spicule tip blunt with a hook-like structure; gubernaculum with a short and Y-shaped cuneus and corpus well-separated posteriorly. For infective juvenile, the combination of the following characters: body length (1113 ± 68 μm), distance from anterior end to excretory pore (95 ± 3.7 μm), tail length (78 ± 5.2 μm), and E % (123 ± 7) can be used to differentiate the new species from other nematodes. For female, the tail (conoid with a long mamillate terminus and a distinct postanal swelling) and vulva (slightly protruding from body surface with conspicuous double flapped epiptygma) shapes can be used as diagnostic characters for the new species. 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For male, the new species can be recognized by spicule length (86 ± 6.3 μm); spicule tip blunt with a hook-like structure; gubernaculum with a short and Y-shaped cuneus and corpus well-separated posteriorly. For infective juvenile, the combination of the following characters: body length (1113 ± 68 μm), distance from anterior end to excretory pore (95 ± 3.7 μm), tail length (78 ± 5.2 μm), and E % (123 ± 7) can be used to differentiate the new species from other nematodes. For female, the tail (conoid with a long mamillate terminus and a distinct postanal swelling) and vulva (slightly protruding from body surface with conspicuous double flapped epiptygma) shapes can be used as diagnostic characters for the new species. 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subjects 28S rDNA sequence
animal morphology
animal taxonomy
Animals
Base Sequence
Biological and medical sciences
Biological control
body measurements
China
Control
crossing
DNA, Helminth
Entomopathogenic nematode
entomopathogenic nematodes
Female
Fundamental and applied biological sciences. Psychology
Identification
internal transcribed spacers
Invertebrates
Male
Microscopy, Electron, Scanning
Molecular Sequence Data
molecular systematics
morphometry
Nemathelminthia. Plathelmintha
Nematoda
new species
nucleotide sequences
Phylogeny
Phytopathology. Animal pests. Plant and forest protection
Polymerase Chain Reaction
Protozoa. Invertebrates
rDNA ITS sequence
Rhabditida - anatomy & histology
Rhabditida - classification
Rhabditida - physiology
ribosomal DNA
Soil Microbiology
Steinernema
Steinernema aciari sp. n
Steinernematidae
Systematics. Geographical distribution
Taxonomy
title Steinernema aciari sp. n. (Nematoda: Steinernematidae), a new entomopathogenic nematode from Guangdong, China
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