Descriptions of Two New Genera, Scageliopsis and Glandothamnus (Ceramiaceae, Rhodophyta), Including Five Previously Undescribed Species From Southern Australia

Two genera, Scageliopsis and Glandothamnus , including 5 new species (Scageliopsis patens , Glandothamnus ramulentus , G. manifestus , G. flexilis , and G. acicularis ), are described from southern Australia. Both genera have some similarities with the northern hemisphere genus Scagelia Wollaston and with Platythamnion J. Agardh. Scageliopsis and Glandothamnus are placed with Scagelia in the tribe Antithamnieae (Ceramiaceae). Complete keys to all known genera of the tribes Antithamnieae and Heterothamnieae are included.