| A new species Ralfsia huanghaiensis nov. sp. was identified from specimens collected by the authors in November, 1982 and 1982 - 1988 from Heishijiao, Shi-miao, Changshan Islands, Lushun and Jinshou,. in the Dalian region. Holotypes are deposited in the Dalian Fisheries College Herbarium.
Ralfsia huanghaiensis nov. sp, (Fig.1 - Fig.3)
Thalli, yellow brownish in color, coriaceous, crustaceous, adhere loosely to midtidal rocks and radially branched dichotomous or trichotomus divisions, about 1.2 - 2.0 cm wide and 0.6 - 1.0 mm thick when matured. Thalli composed of two layers; the basal layers with horizontally extended cells possessing assurgent filaments and downwardly directed filaments which give rise to rhizoids, the upper layers with 3 - 6 cells, densely arranged in rows. Unilocular sporangia rather large, elongate cylindrical in shape, 100 - 110 μm in length, 24 - 28 μm in diameter, with a basal stalk cell. Lateral filaments clavate, composed of 8 - 10 cell, 200 - 208 μm in length, 10 - 13 μm in diameter. Plurilocular sporangia with uniserially arranged 5 - 6 cells and one sterile terminal cell per series, is not acoompanied by paraphyses. Both of them are formed in the upper layer of the thalli.
Holotype, 8211 (Sporophyte) at Heishijiao of Dalian region, 15, November, 1982. |
