Is there an isovector companion of the X(2175)?

In this Letter we study the reaction e+e−→ϕπ0η with the π0η system in an isoscalar s-wave configuration. We use a formalism recently developed for the study of e+e−→ϕππ and e+e−→ϕK+K−. The obtained cross section is within the reach of present e+e− machines. Measuring this channel would test the absence of an isovector companion of the X(2175) as predicted by the three body approach to this resonance.