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Asteroidea - Hudsonasteridae
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If no rank is listed, the taxon is considered an unranked clade in modern classifications. Ranks may be repeated or presented in the wrong order because authors working on different parts of the classification may disagree about how to rank taxa.
|L. G. Herringshaw et al. 2007||Hudsonasterid with primary circlet of large, somewhat irregular primary radials and interradials abutting directly against proximal superomarginals and carinals. Superomarginals and inferomarginals round in shape, primary carinals more angular and slightly smaller in size; separated by numerous minor carinals. Small, circular, radially grooved madreporite present in aboral interradius.|