Journal
JOURNAL OF HELMINTHOLOGY
Volume 96, Issue -, Pages -Publisher
CAMBRIDGE UNIV PRESS
DOI: 10.1017/S0022149X22000529
Keywords
Entomopathogenic nematodes; Insectivora-group; molecular analysis; new species; Ochrobactrum pseudogrignonense; taxonomy
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Funding
- Ferdowsi University of Mashhad [p3/48695]
- Iran National Science Foundation (INSF) [97024982]
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A new species of the genus Oscheius, Oscheius Cyrus n. sp., was discovered in moist soils in the north of Iran. Molecular and morphological data confirmed its belonging to the Insectivora-group and distinguished it from other similar species. The dominant associated bacterium of the new Oscheius species was identified as Ochrobactrum pseudogrignonense.
A new species of the genus Oscheius, Oscheius cyrus n. sp., collected in the moist soils taken from forest heights in the north of Iran, is recorded. A comprehensive description, comprising molecular (internal transcribed spacer (ITS), 18S, and 28S rDNA genes) information, morphometrics data, light microscope and scanning electron microscope images, is supplied. The species resembles Oscheius myriophilus. However, the highest ranges for female body length, female tail, infective juvenile tail length, median bulb, absence of epiptygma and lateral field incisures number vary. The new species was distinguished from Oscheius insectivorus by the general lip region. The male was not found. Molecular analysis showed that the new species has the most similarity to O. myriophilus both in the ITS and 18S regions. Morphological and molecular data confirmed its belonging to the Insectivora-group. Furthermore, the species of Ochrobactrum pseudogrignonense was reported as a dominant associated bacterium of the new Oscheius species. Finally, the mortality of the host after seven days varied from 20% to 82.5%, depending on nematodes' concentration.
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