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- Title
Steinernema borjomiense n. sp. (Rhabditida: Steinernematidae), a new entomopathogenic nematode from Georgia.
- Authors
Gorgadze, Oleg; Fanelli, Elena; Lortkhipanidze, Manana; Troccoli, Alberto; Burjanadze, Medea; Tarasco, Estachio; De Luca, Francesca
- Abstract
A new species of entomopathogenic nematode, Steinernema borjomiense n. sp., was isolated from the body of the host insect, Oryctes nasicornis (Coleoptera: Scarabaeidae), in Georgia, in the territory of Borjomi-Kharagauli. Morphological characters indicate that the new species is closely related to species of the feltiae-group. The infective juveniles are characterised by the following morphological characters: body length of 879 (777-989) μm, distance between the head and excretory pore = 72 (62-80) μm, pharynx length = 132 (122-142) μm, tail length = 70 (60-80) μm, ratio a = 26.3 (23.0-29.3), H% = 45 (40-51), D% = 54 (47-59), E% = 102 (95-115), and lateral fields consisting of seven ridges (eight incisures) at mid-body. Steinernema borjomiense n. sp. was molecularly characterised by sequencing three ribosomal regions (the ITS, the D2-D3 expansion domains and the 18S rRNA gene) and the mitochondrial COI gene. Phylogenetic analyses revealed that S. borjomiense n. sp. differs from all other known species of Steinernema and is a member of the monticolum-group.
- Subjects
STEINERNEMATIDAE; INSECT nematodes; BEETLES; TAXONOMY; MORPHOMETRICS
- Publication
Nematology, 2018, Vol 20, Issue 7, p653
- ISSN
1388-5545
- Publication type
Article
- DOI
10.1163/15685411-00003167