[1] X. churro shares morphological similarities with other species of the genus Xenoturbella, and is known for lacking respiratory, circulatory and an excretory system.

The body wall displays several furrows: on the circumference, on the side, and four deep, longitudinal, dorsal ones.

[1] Tissues contain exogenous DNA corresponding to a bivalve mollusk, the vesicomyid Calyptogena pacifica.

[1] Comparison of mitochondrial DNA and protein sequences showed that the species X. churro is the sister group to X. profunda.

In turn, these two species share evolutionary affinities with X. monstrosa into a clade of 'deep-water' taxa.