One order is the monotypic Stensioellida, containing the enigmatic "Stensioella", and the other order is the equally enigmatic Pseudopetalichthyida.
Another order is the equally enigmatic Pseudopetalichthyida. One order is the monotypic Stensioellida, containing the enigmatic "Stensioella".
One order is the monotypic Stensioellida, containing the enigmatic "Stensioella". Another order is the equally enigmatic Pseudopetalichthyida.
One order is the monotypic Stensioellida, containing the enigmatic "Stensioella". Another order is the equally enigmatic Pseudopetalichthyida.