Two new species of the genus Hypoglossum Kützing (Delesseriaceae, Rhodophyta) are described: H. androlamellare sp. nov. from Zanzibar Island, Tanzania, and H. annae sp. nov. from the Malay Archipelago. The former is the first species of Hypoglossum to be reported from Tanzania and is distinguished by a combination of its overall habit, the chevron-like arrangement of the spermatangial sori, and the non-participation of lateral pericentral cells in sporangium formation within the tetrasporangia sori. The latter species is based on the material identified by Weber-van Bosse as “Hypoglossum spathulatum Kützing” ( [16] and [17] , as Delesseria spathulata Sonder), which has been recognized as having nothing to do with the present taxonomic placement of that species, Apoglossum spathulatum (Sonder) Womersley et Shepley. H. annae is distinguished by the restriction of its reproductive structures to relatively small final-order, or penultimate-order, bladelets. Hypoglossum simulans M.J. Wynne, I.R. Price et D.L. Ballantine is newly reported for Zanzibar. |
