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Characterisation of two Chinese native Hemicriconemoides species (Nematoda: Criconematidae) with updated descriptions of H. chitwoodi Esser, 1960 and Criconemoides myungsugae Choi & Geraert, 1975

AuthorsMaria, Munawar; Cai, Ruihang; Castillo, Pablo ; Cantalapiedra-Navarrete, C.
KeywordsCriconemoides myungsugae
First record
Hemicriconemoides chitwoodi
Hemicriconemoides fujianensis
Hemicriconemoides parasinensis
Host association
Issue Date1-Feb-2019
PublisherBrill Academic Publishers
CitationNematology 21(2): 181-205 (2019)
AbstractPopulations of Hemicriconemoides chitwoodi, H. fujianensis, H. parasinensis, and Criconemoides myungsugae isolated in China from the rhizosphere soil of woody perennials were characterised molecularly, important morphological details being elucidated by SEM observations. The morphometric data of the Chinese populations were compared with all previously reported populations. The SEM observations of en face views indicated that H. chitwoodi and H. parasinensis have lip patterns belonging to type 1 and phylogenetically both species clustered with other Hemicriconemoides species that showed the same kind of lip pattern. On the other hand, H. fujianensis showed a lip pattern belonging to type 2 and phylogenetically appears basal to the above-mentioned clade. SEM observation of C. myungsugae showed that the first lip annulus forms a non-projecting uninterrupted disc and the labial annulus is a rectangular shape with slight dorsal and ventral indentations. Phylogenetic relationships among Criconemoides spp. are apparently not well resolved. The present study provides updated morphological descriptions, molecular diagnostics and phylogenetic relationships of H. chitwoodi, H. fujianensis, H. parasinensis, and C. myungsugae, the last species being the first report from China.
Publisher version (URL)https://doi.org/10.1163/15685411-00003206
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