Rathbunaster is a monospecific genus of sea stars in the family Asteriidae. The genus name was given by Walter Kenrick Fisher to honor the American biologist...

on the starfish's surface. Some species like Labidiaster annulatus, Rathbunaster californicus and Novodinia antillensis use their large pedicellariae...

Müller and Troschel, 1840 Plazaster Fisher, 1941 Psalidaster Fisher, 1940 Rathbunaster Fisher, 1906 Saliasterias Koehler, 1920 Sclerasterias Perrier, 1891 Stephanasterias...

was indubitably a member of class Asteroidea and was a sister taxon to Rathbunaster in the order Forcipulatida. It is considered that X. medusiformis may...