The species name galapagensis has the incorrect ending (m/f), which led to a mandatory change to galapagense (n.) by Okanishi & Fujita (2018). However, the stem of Galapagos should be galapago and consequently the name should probably be galapagoense, which may not be mandatory though.
Okanishi, M.; Fujita, T. (2018). A taxonomic review of the genus Astrodendrum (Echinodermata, Ophiuroidea, Euryalida, Gorgonocephalidae) with description of a new species from Japan. Zootaxa. 4392(2): 289.