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

[5] The etymology of the species name corresponds to a scientific patronym in honor of Linda and Nicholas Holland.

[6] Xenoturbella hollandorum is 2.5 cm (0.98 in) in length, with a uniform bright pink colouration.

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

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