Two new desma-less species of Theonella Gray, 1868 (Demospongiae: Astrophorida: Theonellidae), from the Great Barrier Reef, Australia, and a re-evaluation of one species assigned previously to Dercitus Gray, 1867 Author Hall, Kathryn A. Marine Environments, Natural Environments Program, Queensland Museum, South Brisbane, Queensland, Australia. Author Ekins, Merrick G. Marine Environments, Natural Environments Program, Queensland Museum, South Brisbane, Queensland, Australia. Author Hooper, John N. A. Marine Environments, Natural Environments Program, Queensland Museum, South Brisbane, Queensland, Australia. & Eskitis Institute for Drug Discovery, Griffith University, Nathan, Queensland, Australia. text Zootaxa 2014 2014-06-11 3814 4 451 477 journal article 5361 10.11646/zootaxa.3814.4.1 2d8b2273-4e20-4eab-bdce-f3f281851929 1175-5326 4919275 13BE2340-E772-421A-8215-E78578815A4E Genus Theonella Gray, 1868 Rhachella Sollas, 1888 Diagnosis. with characteristics of Theonellidae ; ectosomal spicules as phyllo- to dichotriaenes; large choanosomal oxeas sometimes present; megascleres sometimes completely absent; microscleres as small, acanthose microrhabds only, sometimes curved slightly. Type-species. Theonella swinhoei Gray, 1868 ; by monotypy ( Gray 1868 ).