query: parent_taxon zeugophiurina
supports: Zeugophiurina is a suborder of primitive brittle stars with three extinct families . The family Ophiocanopidae with only one living genus and species , Ophiocanops fugiens has been placed here but recent studies have challenged this classification . The Oegophiurida are an order of brittle stars, class Ophiuroidea.  
  In formal nomenclature.
  When formally naming a taxon, uncertainty about its taxonomic classification can be problematic. The International Code of Nomenclature for algae, fungi, and plants, stipulates that "species and subdivisions of genera must be assigned to genera, and infraspecific taxa must be assigned to species, because their names are combinations", but ranks higher than the genus may be assigned "incertae sedis". Ophiocanops fugiens is the only one living species in the brittle star family Ophiocanopidae. It has been regarded as the most primitive brittle star, close to Paleozoic forms, though other authors have disagreed with the view. "Ophiocanops" is usually placed in the order Oegophiurida (suborder Zeugophiurina) or regarded as a genus "incertae sedis" or even given its own subclass Oegophiuridea. Some recent data suggest its relationship to the extant family Ophiomyxidae (it would thus belong to the order Phrynophiurida). The Phrynophiurida (formerly called Euryalae) are an order of brittle stars containing the basket stars. Brittle stars or ophiuroids are echinoderms in the class Ophiuroidea closely related to starfish. They crawl across the sea floor using their flexible arms for locomotion. The ophiuroids generally have five long, slender, whip-like arms which may reach up to in length on the largest specimens. They are also known as serpent stars; the New Latin class name Ophiuroidea is derived from the Ancient Greek , meaning "serpent".
candidates: fungi oegophiurida ophiocanops ophiuroidea phrynophiurida starfish
answer: oegophiurida