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Wetzeliella (Rhombodinium) glabra
Wetzeliella (Rhombodinium) glabra Cookson, 1956
Originally (and now) Rhombodinium, subsequently Wetzeliella subgenus Rhombodinium.
Holotype: Cookson, 1956, pl.2, fig.1
Paratype: Cookson, 1956
Locus typicus: Noarlunga, south-east of Adelaide, S. A.
Stratum typicum: Carbonaceous clay from Noarlunga, Eocene
Original diagnosis: Cookson, 1956, p.186
Cell encysted, flattened, quadrangular in outline with an entire margin, divided equally by a transverse girdle into a triangular epitheca with a short, bluntly pointed apical horn and a hypotheca with 2 short unequal horns. The girdle is most clearly evident in the position of lateral horns. The cell membrane is finely granular and usually completely smooth; in the holotype a few minute teeth-like outgrowths are present in the region of the horns, particularly the apical horn. The cyst, which is separated from the cell membrane by a wide space, is ellipsoidal and flattened, and has a moderately thick, roughened wall with a granular sculpture (Plate 2, Fig.4). An approximately quadrangular opening hasbeen present in all the specimens, and the detached "lid" can sometimes be seen lying in the cell cavity.
Dimenisons: Holotype (Plate 2, Fig. 1): cell 137 µm long x 126 µm broad; cyst 82 µm long x 82 µm broad. Paratype (Plate 2, Fig. 5): cell 117 µm broad, cyst 75 µm long x 73 µm broad.
Originally (and now) Rhombodinium, subsequently Wetzeliella subgenus Rhombodinium.
Holotype: Cookson, 1956, pl.2, fig.1
Paratype: Cookson, 1956
Locus typicus: Noarlunga, south-east of Adelaide, S. A.
Stratum typicum: Carbonaceous clay from Noarlunga, Eocene
Original diagnosis: Cookson, 1956, p.186
Cell encysted, flattened, quadrangular in outline with an entire margin, divided equally by a transverse girdle into a triangular epitheca with a short, bluntly pointed apical horn and a hypotheca with 2 short unequal horns. The girdle is most clearly evident in the position of lateral horns. The cell membrane is finely granular and usually completely smooth; in the holotype a few minute teeth-like outgrowths are present in the region of the horns, particularly the apical horn. The cyst, which is separated from the cell membrane by a wide space, is ellipsoidal and flattened, and has a moderately thick, roughened wall with a granular sculpture (Plate 2, Fig.4). An approximately quadrangular opening hasbeen present in all the specimens, and the detached "lid" can sometimes be seen lying in the cell cavity.
Dimenisons: Holotype (Plate 2, Fig. 1): cell 137 µm long x 126 µm broad; cyst 82 µm long x 82 µm broad. Paratype (Plate 2, Fig. 5): cell 117 µm broad, cyst 75 µm long x 73 µm broad.