Hyella caespitosa

Hyella caespitosa Bron et Flah Tedania ignis Nostoc sphaericum Tolypothrix tjipanasensis New Zealand Ascidian Australian Ascidian Didemnum sp. 

Since the late 1960s, several carbazole alkaloids oxygenated in the 3-position were isolated from diverse natural sources, the majority of which were isolated from different plant sources. However, in 1979, Moore et al. reported the isolation of two unusual, non-basic, 3-oxygenated carbazole alkaloids, hyellazole (245) and chloro-hyellazole (246), from the blue-green marine algae Hyella caespitosa (225). These alkaloids have structures entirely different from those of the carbazole alkaloids isolated from terrestrial plants. 

Subtidal habitats are the domain of Hyella caespitosa Bornet et Flahault. H. caespitosa bores long individual tunnels (Fig. 2.4.2-1,2) rather than common conical pits and forms a dense network of intertwined borings several hundred microns deep. Both species of Hyella meet and overlap in the lower intertidal zone. Shaded areas of the intertidal zone are sometimes dominated... 

Hyellazole and chlorohyellazole are two derivatives of carbazole isolated from the littoral cyanobacteriiun Hyella caespitosa (Cardellina et al., 1979b). 

CardeDina, J.H., Kirkup, M.P., Moore, R.E., Mynderse, J.S., SefF, K.S., and Simmons, C.J. (1979b) Hyellazole and chlorohyeDazole, two novel carbazoles from the blue-green alga Hyella caespitosa Born et Flash. Tetrahedron Lett., 20, 4915-4916. 

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