Non–metric MDS ordination of all specimens analyzed. Two clear clusters displayed which represent the species Parvulastra dyscrita on the left, and the species Parvulastra exigua on the right. Circles indicate 75% similarity. The specimen causing a cluster overlap is of the species P. exigua, but has many of the morphological characteristics associated with P. dyscrita due to its large size and possibly collection location.

  Part of: Payne RP, Griffiths CL, von der Heyden S, Koch E (2015) The cushion–star Parvulastra exigua in South Africa: one species or more? ZooKeys 524: 1-16.