Velumbrella is an eldonioid[1] known from the Early to Middle Cambrian of Poland.[2] The fossils depict a scleritosed disk with a U-shaped gut.[3]
Velumbrella was originally thought to be related to the hydrozoan order Trachylenida,[4] or possibly to Ediacaria or Beltanella which were considered to be Cambrian jellyfish.[5] Upon erecting the class Eldonioidea, Dzik assigned Vellumbrella to Eldoniidae rather than Rotadiscidae on account of its radial ribs.[6]
Several authors (including Dzik) later noted the similarity between Velumbrella cznarnockii and Pararotadiscus guizhouensis (which was initially described as Rotadiscus guizhouensis).[7][8] A more recent review tenatively placed Velumbrella in the Rotadiscidae (along with the more confidently-assigned Pararotadiscus),[1] noting that the rotadiscids are distinguished from other eldonioid families by concentric ornamentations on the dorsal surface.[9]
