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An 18s Rdna Perspective On The Classification Of Criconematoidea, Thomas O. Powers, Timothy Harris, Rebecca Higgins, Peter Mullin, Kirsten Powers
An 18s Rdna Perspective On The Classification Of Criconematoidea, Thomas O. Powers, Timothy Harris, Rebecca Higgins, Peter Mullin, Kirsten Powers
Department of Plant Pathology: Faculty Publications
In the nematode family Criconematidae, a taxonomy primarily based on cuticle characters has created classifications that are notoriously volatile. Molecular characters may lead to their stabilization. A phylogenetic tree of Criconematoidea was constructed using 166 new near full-length 18S rDNA sequences and 58 sequences from GenBank. Bayesian and maximum likelihood (ML) analyses produced trees with similar topologies. Major features include a strongly supported clade that includes Criconematidae and Hemicycliophoridae, excluding Paratylenchidae and Tylenchulidae. Another well-supported clade groups Criconema, Ogma, Crossonema, and Hemicriconemoides plus Xenocriconemella, combining nematodes with cuticular scales with those without scales at any life stage. Mesocriconema, Discocriconemella limitanea, …