Two New Species of Myxozoa, <i>Myxobolus inaequus</i> sp. n. and <i>Henneguya theca</i> sp. n. from the Brain of a South American Knife Fish, <i>Eigemannia virescens</i> (V.)

Abstract

Two new species of Myxozoa from the brain of the green knife fish Eigemannia virescens are described: Myxobolus inaequus sp. n. has an unusually large spore body and extremely unequal polar capsules, and Henneguya theca sp. n. has an attenuated spore encased in a sheath not previously described in other Myxozoa . Only spores of the two species were observed, and infections caused no obvious pathological changes in the brain.