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- Title
Ditylenchus dactylonae n. sp. (Tylenchomorpha: Anguinidae), an associate of Cynodon dactylon (L.) Pers. in the USA.
- Authors
Zeng, Yongsan; Dant, Lukas A.; Roberts, Joseph A.
- Abstract
Summary: A new species of the genus Ditylenchus was recovered from rhizosphere soil of a 'TifEagle' hybrid bermudagrass (Cynodon dactylon (L.) Pers. × C. transvaalensis (Burtt-Davy)) putting green located at the Pee Dee Research & Education Center, Clemson University, Florence, SC, USA. It is described herein as Ditylenchus dactylonae n. sp. and is characterised by possessing the combined characters of a medium body size (682-815 μ m in females; 618-718 μ m in males), six incisures at the lateral fields, a delicate stylet (7.6-8.0 μ m) with rounded knobs, a bottle-shaped basal pharyngeal bulb (BPB), an excretory pore (EP) near anterior end of BPB, a posteriorly located vulva (V = 78-83%), a reflexed ovary, a uterus with crustaformeria anteriorly and nearly spherical structure posteriorly, a post-vulval uterine sac (30-50% of the vulva-anus distance), an elongate conoid and ventrally bent tail, a tylenchoid spicule (17-18 μ m), and a leptoderan bursa. Ditylenchus dactylonae n. sp. was differentiated from other sequenced species by the partial small subunit (SSU) rRNA gene, D2-D3 expansion segments of the large subunit (LSU) rRNA gene and internal transcribed spacer (ITS) rRNA. Phylogenetic analysis revealed that D. dactylonae n. sp. belongs to the D. dipsaci -group, and is sister to D. medicaginis and/or D. ferepolitor based on SSU 18S, LSU D2-D3 and ITS sequences.
- Subjects
CLEMSON University; BERMUDA grass; BODY size; RIBOSOMAL RNA; VULVA; RHIZOSPHERE; OVARIES
- Publication
Nematology, 2023, Vol 25, Issue 5, p579
- ISSN
1388-5545
- Publication type
Article
- DOI
10.1163/15685411-bja10240