This section is in progress.Order AMPHIDISCOSIDA
Family HyalonematidaeHyalonema populiferum
Family PheronematidaePoliopogon mendocino
Order LYSSACINOSIDA
Family EuplectellidaeNubicaulus careyi
Family Leucopsacasidae [Placopegmatidae]Leucopsacus scoliodocus
Family Rossellidae [Lanuginellidae]Acanthascus new species
Family RossellidaeAcanthascus platei
Family RossellidaeRhabdocalyptus dawsoni
Family RossellidaeStaurocalyptus dowlingi
Family RossellidaeStaurocalyptus solidus
Order HEXACTINOSIDA