Arthrocereus
Arthrocereus, Kakteen: 146, 337. 1929, nom. cons. sec. Zappi & Taylor 20201 wfo-4000003156
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Taxon standing
Category B. The genus is monophyletic based on phylogenetic studies that support the clade based on a sufficiently dense or even complete sampling, or support a monotypic genus as a distinct lineage, but do not provide a new taxonomic treatment at the species level. In many cases, older classical taxonomic synopses or a monographic treatment exist for these genera providing a reliable assessment of the species included.