Original paper

Marine Cyanophyceae of Papua New Guinea. VII. Endoliths

Taton, Arnaud; Hoffmann, Lucien

Abstract

During several expeditions to Papua New Guinea (1986-1997), fragments of carbonate substrates (especially coral skeletons) were sampled in the intertidal as well as in the infralittoral zones. Their endolithic blue-green algal flora was studied by classical light microscopical methods. A total of seventeen endolithic blue-green algal taxa belonging to the genera Hapalosiphon, Herpyzonema, Hormathonema, Hyella, Kyrtuthrix, Leptolyngbya, Lithonema, Mastigocoleus, and Solentia could be distinguished. In the intertidal zone, exposed during low tides to drying and rain, Herpyzonema intermedium, Hormathonema violaceonigrum, H. luteobrunneum, Hyella spp., Kyrtuthrix dalmatica, Mastigocoleus testarum, and Solentia spp. were frequently found. The true-branching Lithonema adriaticum was frequently observed in the intertidal zone, but always in low abundance. In the upper intertidal zone, besides Herpyzonema intermedium, a second stigonematalean endolithic blue-green alga was occasionally observed; it probably represents a new species tentatively placed in the genus Hapalosiphon. Although not quantitatively of great importance, the greatest diversity occurred in the genus Hyella with six distinct taxa, two of which may represent new species. In the infralittoral zone, endolithic blue-green algae were less diverse (mainly Leptolyngbya terebrans and Mastigocoleus testarum) and they were often accompanied by endolithic green algae (especially Ostreobium sp.), especially inside living corals.

Keywords

bioerosioncyanobacteriacyanophyceaeendolithsmarinepapua new guinea