Heydrichia woelkerlingii gen. et sp. nov., a newly discovered non-geniculate red alga (Corallinales, Rhodophyta) from Cape Province, South Africa

Heydrichia homalopasta sp. nov. (Sporolithaceae, Rhodophyta) from Australia

“…Three species of Heydrichia have been described in the last five years (Townsend et al 1994, Keats and Figs 9Ϫ13. Heydrichia homalopasta (BB7902).…”

“…They were then processed for transmission electron microscopy (TEM), scanning electron microscopy (SEM) and light microscopy (LM) using a combination of the methods described in Borowitzka and Vesk (1978) and Townsend et al (1994).…”

“…The terminology used in this paper is that used by Townsend and Adey (1990) and Townsend et al (1994Townsend et al ( , 1995 except that the term sorus is replaced by nemathecium. A nemathecium is defined as an area of thallus where the vegetative structure has been modified concurrent with the differentiation of reproductive cells.…”

“…Heydrichia shares character states with Sporolithon, such as a calcified sporangial initial wall and proliferation of the tetrasporangia from individual stalk cells but there are also differences such as the numerous stalk cells formed in the sporangial complexes of Heydrichia as compared to the single stalk cells observed in Sporolithon. Heydrichia comprises three species: two have been described from South Africa (Townsend et al 1994, Keats andChamberlain 1995) and the third, H. homalopasta from southeastern Australia is described in this paper.…”

“…The Sporolithaceae contains two genera, Sporolithon and Heydrichia Townsend, Chamberlain et Keats (1994). Heydrichia shares character states with Sporolithon, such as a calcified sporangial initial wall and proliferation of the tetrasporangia from individual stalk cells but there are also differences such as the numerous stalk cells formed in the sporangial complexes of Heydrichia as compared to the single stalk cells observed in Sporolithon.…”